3993 - tan mai-mien dong paper mill - preliminar

PROPOSAL FOR THE ANAEROBIC

WASTE WATER TREATMENT PLANT OF

TAN MAI-MIEN DONG PAPER MILL

Dong Ngai, Vietnam

This document is the property of GLOBAL WATER ENGINEERING (GWE) Ltd., Hong Kong. It shall not be copied, reproduced, transmitted or communicated to third parties without the explicit agreement of GWE. International Conventions of Berne (1886) - Paris (1896) – Berlin (1908) – Berne (1914) – Rome (1928) – Brussels (1948).

Rev. 0 June 09, 2010 PROJ. No. 3993

TABLE OF CONTENTS

1. COMPOSITION OF THE WASTEWATER .................................................................................................................... 1

2. PROCESS DESCRIPTION .............................................................................................................................................. 2

2.1 PRETREATMENT ......................................................................................................................................................... 2 2.2 ANAEROBIC TREATMENT (ANUBIX™-B) .................................................................................................................. 2 2.3 BIOGAS HANDLING ..................................................................................................................................................... 4

3. BASIC DESIGN DATA .................................................................................................................................................... 5

3.1 PRETREATMENT ......................................................................................................................................................... 5 3.2 METHANE REACTOR (ANUBIX™ TYPE) .................................................................................................................... 5

4. SHORT TECHNICAL DESCRIPTION .......................................................................................................................... 7

4.1 MECHANICAL EQUIPMENT .......................................................................................................................................... 8 4.2 PIPING ..................................................................................................................................................................... 12 4.3 INSTRUMENTATION-AUTOMATION- ELECTRICAL ....................................................................................................... 13 4.4 CIVIL WORKS ........................................................................................................................................................... 13

5. DRAWINGS.................................................................................................................................................................... 15

6. COMMERCIAL PROPOSAL ....................................................................................................................................... 16

6.1 SCOPE OF SUPPLY (GWE DELIVERABLES).................................................................................................................. 16 6.1.1 Engineering ........................................................................................................................................................ 16 6.1.2 Mechanical Equipment ....................................................................................................................................... 17 6.1.3 Instrumentation................................................................................................................................................... 17 6.1.4 Panels and Process Control System; Electrical Equipment .................................................................................. 17 6.1.5 Technical Assistance Services ............................................................................................................................. 17 6.1.6 Other items ......................................................................................................................................................... 18

6.2 EXCLUSIONS ............................................................................................................................................................ 18 6.3 BATTERY LIMITS ..................................................................................................................................................... 18 6.4 PRICE ...................................................................................................................................................................... 19 6.5 COMMERCIAL CONDITIONS ....................................................................................................................................... 19

7. LOCAL PART ................................................................................................................................................................ 23

9 June 2010

PROPOSAL PROJECT:

WASTEWATER TREATMENT

CLIENT: PLANT

Tan Mai-Mien Dong Paper Mill PROJECT No: 3993 SHT Dong Ngai, Vietnam BY : DDE 1

REV Date DESCRIPTION BY CHD

1. COMPOSITION OF THE WASTEWATER =======================================

As per data received from the customer, completed as per our experience.

Origin of wastewater: paper mill on recycled paper

Table 1: Wastewater composition (Basis of Design)

PARAMETER UNIT INFLUENT

Flow rate m3/d 30,000

m3/h 1,250

COD mg/l 4,000

kg/d 120,000

BOD5 mg/l 2,600

TSS, max mg/l 1,100

TKN mg/l NA

Calcium, max mg/l 500

SO4 mg/l 500

Total P mg/l NA

F.O.G. mg/l <25

pH - 6-8

Temperature °C 35°C

Comments and remarks:

1. The values in italics (Ca, SO4, temperature) are our estimates, to be confirmed.

2. BOD5 value corrected to the real BOD5/COD ratio of 0.65

3. Nitrogen and phosphorus content are unknown. But in this kind of wastewater N and P are

more or less absent. Sufficient quantities must be added as nutrient for anaerobic treatment.

4. The chloride content is assumed to below 500 mg/l. Frequently higher values would have

consequences for material choice (type of stainless steel). Unless mentioned otherwise,

stainless steel used in machines and systems is AISI 304 and AISI 304L (1.4301), or

occasionally better.

5. We further assume sufficient inherent anaerobic biodegradability of the organic matter in the

wastewater, as measurable in a lab test, and being at least 75%, as common for such paper

mills. Potentially toxic, harmful or inhibiting products are not present in concentrations that

can disturb a biological system in one way or another.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



2. PROCESS DESCRIPTION =========================

2.1 Pretreatment

The wastewater is pumped over a screen (S100) and into a DAF (Dissolved Air Flotation) unit

(S105).

In the DAF unit, the solids are forced to float by fine air bubbles attaching to the solids. The fine

air bubbles are created by recycling clean effluent, in which air is dissolved under pressure. After

injection into the flotation tank, the pressure release results in formation of fine air bubbles.

After the DAF the wastewater is pumped (P115A/B) into the equalization tank (B101) where

biological hydrolysis/acidification processes take place, resulting in the formation of organic

acids, which causes a serious pH drop (down to 5 – 7). This equalization tank is gently mixed

(with submerged mixers A101A/B).

A pH correction on the equalization basin outlet (anaerobic reactor inlet) is foreseen. This pH

correction with NaOH is mainly important in the start-up phase, afterwards it will be low or

stand-by, as typical for this type of paper mills. The pH in the feed line to the methane reactor is

continuously measured and, if required (occasionally), adjusted through in-line NaOH dosing in

front of a static mixer. The setpoint of the pH control lies in the neutral to acid range, depending

on the progress of plant start-up and the loading of the plant. In automatic mode, a cascaded pH

control is activated. The setpoint of the influent pH control is dynamically and step-wise (at

preset intervals) adjusted, in function of the pH in the methane reactor effluent (=pH in recycle).

This system allows minimization of NaOH consumption, while safeguarding correct pH

conditions at any time. In case this pH cascade system would be insufficient to keep the pH of

the methane reactor within a pre-set range, the wastewater influent flow will automatically stop,

as long as the pH remains out of the safe range. If in the meantime the equalization basin fills up,

it will overflow and bypass the anaerobic treatment stage.

2.2 Anaerobic treatment (ANUBIX™-B)

From the pretreatment the wastewater is pumped (P101A/B) into 3 ANUBIX™-B methane

reactors, which is the recommended reactor selected from GWE's program that constitutes the

best system for this wastewater. It is an “Upflow Anaerobic Sludge Bed” (UASB) type of

system.

Note that GWE has several different types of anaerobic systems, from low rate covered lagoons

to ultra-high rate expanded granular sludge bed (EGSB) systems, built as high tower reactors.

GWE’s EGSB system, called ANUBIX™-T is ideal for paper mill wastewater with over 5000

mg/l COD, but is not recommended here, since the wastewater is considerable more dilute, and

the ANUBIX™-T system loading becomes strongly limited by hydraulic factors. The

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



ANUBIX™-B system is more suitable for dilute wastewaters, and is not or less limited by high

hydraulic loads (inlet flows).

The wastewater enters the reactors D101A/B/C at a constant flow rate through an influent

distribution system at the bottom. The total wastewater flowrate to the reactor is controlled at a

predetermined setpoint. The influent (effluent of equalization basin) is controlled by a flow

control loop which, after start-up has been completed, has its setpoint controlled in cascade by

the level in the equalization basin. In order to assure a constant flow to the methane reactor, a

second control loop is installed on the methane reactor effluent recycle line (P102), to

compensate for flow variations of the influent.

The ANUBIX™-B reactor is equipped with a special "3 phase separator" device at the top of the

reactor. After rising through an expanded bed of anaerobic active methanogenic sludge (the so

called "sludge blanket") the wastewater/sludge mixture passes

through an internal 3-phase separator device at the top of the

reactor. This results in a separation of the mixed liquor into

clarified wastewater, biogas and sludge. The absence of any

mechanical agitation allows a natural selection towards heavy

floc and granules of active methanogenic sludge. Effluent

recycle is necessary to have a sufficient mixing in the sludge

blanket and a sufficient upflow velocity to expand the sludge

bed. The internal 3-phase separator comprises a built-in "cross-

flow" type parallel plate separator section, to prevent the loss

of even small methanogenic sludge floc. This highly efficient separator, developed by our

engineers to the present 6th generation model, has proven to be very reliable in practice and

allows peak reactor loading rates without significant sludge loss. As sludge loss is effectively

prevented, the separator also allows shorter start-up periods.

Excess sludge can eventually, from time to time, be withdrawn from the bottom of the reactor.

This is not envisaged in the first half year of operation. If no excess sludge is removed, it will

leave the reactor with the effluent, and be removed in the aerobic treatment. This practice is quite

common, and recommended here. However, to obtain the cleanest effluent (lowest TSS, COD,

BOD), regular removal of excess sludge should be applied. The excess sludge can be quite thick

(5-10% DS). It can be land applied (agriculture) or used to start-up new reactors elsewhere. To

facilitate sludge disposal a storage tank can be foreseen (optional on request, but not essential).

Such a tank also provides an emergency stock or a strategic reserve of sludge, to be reused in

case of incidents with the wastewater treatment plant. When storing anaerobic sludge for several

months, the activity drops only slowly.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



2.3 Biogas handling

If not reused in the factory, the biogas is flared off. Several types of biogas flares --- elevated

flare with visible flame, or shielded flare with largely hidden flame, or groundflare with

completely enclosed flame --- can be used, according to the requirements (see InfoSheet). A

standard elevated flare (H101) has been foreseen for this project.

We recommend future reuse of the biogas, e.g. in a factory steam boiler. A separate proposal for

the supply of a biogas burner system, together with other equipment like biogas blowers,

instrumentation, etc. can be made, after the characteristics of the factory boiler have been given.

GWE has extensive experience in the utilization of biogas, and many installations in operation

worldwide.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



3. BASIC DESIGN DATA =====================

3.1 Pretreatment

Screening capacity 1,250 m³/h peak, 1 mm openings

Design flow rate of DAF 1,250 m³/h average

Surface loading rate 5 m/h at average flow (recycle excluded)

Required surface 250 m² minimum

WASTEWATER

FROM FACTORY

REMOVAL

EFFICIENCY

WASTEWATER

AFTER DAF

m³/h 1,250 - 1,250

mg COD/l 4,000 23 3,200

mg TSS/l 1,100 85 200

Sludge production ca 28,000 kg DS/d at 6 % DS or about 470 m³/d

Equalization tank 4 h, or ca 5,000 m³

Caustic soda consumption range 0 – 2,500 l/d NaOH-50% solution, normally near

zero.

Nutrient dosing:

N anaerobic treatment: 15 mg/l N

P anaerobic treatment: 4 mg/l P

N and P for both anaerobic and aerobic treatment can be added once, together, in the anaerobic

reactor inlet. In that case, more dosing capacity must be foreseen.

3.2 Methane reactor (ANUBIX™ Type)

Design COD load 30,000 m³/d x 3,200 mg COD/l = 96,000 kg COD/d

Volumetric loading rate 10 kg COD/m³.d

Corresponding active volume 9,600 m³

Active reactor height 4.8 m (under 3 phase separators)

Total height (inside) 6.5 m

Total water height 6.0 m

Expected removal efficiencies + corresponding effluent values:

For COD 75 – 80 % or COD effluent: 640 - 800 mg/l

Effluent TSS ± 150-250 mg /l on average

Note: the biodegradability of the organic matter in recycle paper mill wastewater is different

from factory to factory. In practice a minimum of 75% biodegradability (and COD removal

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



efficiency) is always observed, but 5 to 10% higher values might be obtained as well. Only

labtests (min. 8 weeks) can reveal in advance more precisely how much COD removal is to be

expected.

Biogas production 33,600 to 35,840 Nm³/d with 75 % CH4 at design loading

Fuel oil equivalent value 22.5 to 24.0 ton/d fuel oil

Anaerobic excess sludge 0-2% of COD removed

0 – 1,500 kg DS/d (TSS), or 0-30 m³/d

Typically no excess sludge is removed, but is allowed to

come out of the system with the anaerobic effluent.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



4. SHORT TECHNICAL DESCRIPTION ====================================

Note:

- GWE reserves the right to apply technical modifications, resulting from ongoing

improvement activities and technological progress.

GENERAL CONCEPT:

The plant is conceived as a compact concrete block, built above ground, with the methane

reactor and the equalization basin in one block. The available area is unknown by assumed to be

available. The outer appearance is that of a building, and not of a wastewater treatment plant.

Example:

The plant can alternative be conceived as a set of circular concrete or steel tanks, cheaper to

build but resulting in higher cost for connecting piping.

LOCAL REGULATIONS:

Any specific requirements (=beyond standard “public domain” regulations) from local

authorities, mentioned in the construction and operation permit of the wastewater treatment plant

(WWTP) or of the factory as a whole, if applicable for the WWTP, must be communicated to

GWE in advance. Typical items of importance, to be cleared by the client in advance are:

- emission standards for sound, gaseous components, odor, if specified

- fire fighting and safety requirements

- effluent monitoring obligations (e.g. sampling devices)

- constructional and architectural requirements, e.g. maximum height, distance to boundary,

colors, materials used.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



4.1 Mechanical equipment

4.1.1 Pre treatment

A106 : Flocculation reactor

Tubular type, capacity 1,250 m3/h, made of HDPE piping in a stainless steel

frame.

M100 : Polyelectrolyte preparation unit, fully automatic. Include mixers and polymer

powder feeder, for max. 4 kg/h neat polymer dosing, 1.1 kW

P107A/B : Primary sludge pump, monopump, 2 – 20 m3/h at 10 mWC, manually adjustable,

4 kW

P116 : Polymer dosing pump, monopump, 4 m³/h at 10 mWC, manually adjustable, 1.5

kW

S100 : Screen, 1 mm openings, capacity 1,250 m³/h max

S105 : Dissolved Air Flotation unit, 18.3 mm package unit, including scraper bridge,

saturation recycle.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



4.1.2 Anaerobic treatment

A101A/B : Submerged agitators, 22 kW, in stainless steel propeller and coated carbon steel

body, direct drive, complete with SS mounting auxiliaries and galvanized steel

hoist (one mobile hoist for all agitators, with catch hook).

A102 : In line mixer, DN500, in HDPE

B101 : Equalization basin, 5,000 m³ wet volume, concrete basin, approx. dimensions

23.6 x 35.4 x 6.5 m (6.0 m max. water depth), open. With protective epoxy

coating on bottom, walls

B102A/B : Effluent holding box, 23.6 x 1.0 x 2.75 m (1.3 m water depth), concrete. Built in

between D101A/B and D101B/C

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



D101A/B/C: Methane Reactors (ANUBIX™-B Type, concrete)

(Rectangular concrete model; on request also circular, concrete or steel)

Concrete basin: L x W x Htotal = 28.3 x 23.6 x 6.5 m (internal)

ANUBIX™ settlers modules (3-phase separators): 84 units of L x W x H = 4.0 x

1.0 x approx. 1.5 m. Construction materials: stainless steel AISI 304/316, PVC,

Trespa ,GRP, with glass fiber reinforced polyester plates

Internal piping: ca. 500 m of 6” pipe (influent distribution system), made of

HDPE.

Coating (or lining): inside on concrete box and outside in separator area, on the

upper 1.5 m layer: coaltar epoxy or solvent free/solvent poor epoxy coating

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



F101 : Caustic soda (50% NaOH) storage tank, 50 m³ volume, carbon steel or plastic

(GRP, HDPE), with level indication

F103 : Aqueous ammonia (30% NH3; NH4OH) storage tank, 30 m³ volume, plastic

(GRP, HDPE), with level indication

F104 : Phosphoric acid (85% H3PO4) storage tank, 5 m3 volume, plastic (GRP, HDPE),

with level indication

H101 : Biogas safety flare, fully automatic operation, 1,900 Nm³/h biogas, continuous

burning, 0.5 kW (ignition). Built in stainless steel. With motor control inlet

valve, flame arrestor, automatic spark ignition, flame detection. Standard

elevated flare with free visible flame. Other flare types available on request (See

InfoSheet).

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



P101A/B : Methane reactor feed pumps (1 stand-by), 1,250 m³/h at 12 m W.C., 75 kW,

horizontal centrifugal pumps, cast iron body, stainless steel shaft and impeller

P102 Methane reactor effluent recycle pump, 880 m³/h at 7 m W.C., 30 kW, horizontal

centrifugal pump, cast iron body and impeller, stainless steel shaft

P103 A/B : Caustic soda metering pumps, 0-260 l/h, automatically

adjustable (frequency control), premounted on skid, with

pulsation dampener.

P105 : Ammonia metering pump, membrane type, 0-110 l/h,

automatically adjustable, electromagnetic drive. Skid

mounted.

P106 : Phosphoric acid metering pump, membrane type, 0-10 l/h,

automatically adjustable, electromagnetic drive. Skid

mounted.

4.2 Piping

Wastewater stainless steel AISI 304 and HDPE (or painted carbon steel on request, for some

pipes)

Biogas stainless steel AISI 304

Chemicals PVC or PE hose in PVC support pipe

or HDPE or PP piping, welded

Water carbon steel, painted or galvanized. Alternative on request: PE/PP or SS.

Piping supports in painted or galvanized carbon steel. Alternative on request: SS

Valves materials in accordance with piping materials

Pipes or pipe sections embedded in or underneath concrete structures and to be installed during

civil works are part of the civil works (supply, fabrication, installation, testing).

Included in the piping is:

- reactor inlet distribution system (HDPE, 3 x 500 m piping DN 150)

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



4.3 Instrumentation-Automation- Electrical

INSTRUMENTATION:

Complete set of instruments for safety and largely automatic operation

See Process Flow Diagrams

Preliminary list:

To be completed

In addition, certain equipment packages come with built-in instruments, e.g. Flare and dosing pumps.

AUTOMATION/PANELS:

To be discussed

4.4 Civil works

The basic design (guideline drawings and specifications) for the civil works is included in our

scope. The detail (structural) design is to be done by a local certified civil engineer (design

institute), and the works by a local contractor. Architectural design is also best done by a local

architect.

The general concept is that of a compact block (See lay-out). Equipment is placed outside, under

a weather protection roof if requested.

The actual civil works comprise:

1. Site clearance, preparation and soil excavations

2. Piling foundation, if needed.

3. Reinforced concrete works

The basic cost driving factors are:

- concrete

- formwork

- reinforcement steel

The amounts can be estimated on request.

4. Buildings

Detail building design is part of the architectural design, not included in our scope. Also to be

foreseen is lighting, water, and if requested sanitary facilities, a HVAC system, etc

To be foreseen are following buildings/rooms

- control room for control panel (20 m²)

5. Coating and painting

6. Ladders, Stairs, Railings

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



One staircase in concrete is foreseen on one side of the structure. Around the walking areas

on the roof, railings must be installed.

Not foreseen in our scope of design so far are:

- Access roads, pavements, gardening, fences, etc

They can be included in the design on request.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



5. DRAWINGS ===========

Process flow diagrams:

D100 Rev.0 Pretreatment

D101 Rev.0 Anaerobic treatment

Preliminary layout drawing

L101 Rev.0

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



6. COMMERCIAL PROPOSAL ===========================

The previous chapters constitute a description of the complete plant, part of which is quoted by

GWE in this chapter. On request certain items can be added or deleted.

Client will have transmitted all local conditions (such as specific local regulations, factory safety

regulations, factory standard procedures for contractors, factory technical standards, factory

layout, site locations, environmental conditions, geological soil report....) at time of order, as far

as relevant for the scope of the quotation. See also §0, LOCAL REGULATIONS. New

information supplied after contract award may result in scope and price changes.

6.1 Scope of supply (GWE deliverables)

6.1.1 Engineering

Basic Design

- process know-how and one time User License

- process design

- equipment dimensioning

- process flow diagrams

Basic Engineering

- piping and instrument diagrams

- utility diagram

- general layout

- civil guidelines drawings

- equipment list

- detailed drawings of proprietary equipment not supplied by GWE, manufactured by others

- short specification of mechanical equipment not supplied by GWE

- electrical consumer list

- instrument list

- special material list

- specification of special materials not supplied by GWE

- general specifications for civil, coating, piping and electrical works

- detailed operation manual (at start-up),

Note: For items supplied by GWE only manufacturer vendor data are being given, complete

with relevant certificates.

See also GWE general InfoSheet No. 39

Detailed Engineering

- detailed engineering drawings for piping (piping layout, sections and/or isometrics)

- detailed engineering drawings for electricity and instrumentation (wiring, cable tray routings)

- Check and review (dimensional) of the civil detailed engineering drawings, made locally

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



NOTE:

1. Other engineering and support services can be rendered on request and are to be paid at our

standard rates, revised annually.

2. All documents, also manufacturer vendor data, are supplied in electronic format (PDF, and

on request also DOC/Word, XLS/Excel, and DWG/AutoCad 2000/2008), by email and/or on

CD. Documents can be supplied on paper, on request.

3. Language: All engineering documents, the overall Plant Operation & Maintenance Manual

(POM) and the manufacturer vendor date (equipment manuals for bought in equipment) are

supplied in English.

6.1.2 Mechanical Equipment

Supply of the following CIF nearest international seaport:

1. A106, M100, P107A/B, P116, S100, S105

2. A101A/B, A102, H101, P101 A/B, P102, P103 A/B, P105, P106

3. ANUBIX™-B settler modules: 252 modules of each 4 x 1 x 1.5 m, with central overflow

channel and adjustable weirs, made out of stainless steel, with glass fiber reinforced

polyester plates.

6.1.3 Instrumentation

Complete package of instrumentation (see Pt. 4.3)

Incl. breather valves/flame arrestors on methane reactors

6.1.4 Panels and Process Control System; Electrical Equipment

To be discussed

6.1.5 Technical Assistance Services

The minimum foreseen and considered adequate by GWE (Thailand or Philippines based staff)

is:

1. Assistance in mounting supervision for equipment supplied by GWE, in particular:

D101A/B/C internals, H101

Estimated requirement: 1 trip, 3 weeks (7d/w) in total.

2. Assistance in commissioning of the plant, including calibration and testing of equipment

supplied by GWE.

Estimated requirement: 2 trips, 3 weeks (7d/w) in total).

3. On-site training of local operators, with class room sessions and on-the-job training, and

assistance in plant start-up and operation.

Estimated requirement: 2 trips, 6 weeks (7d/w) in total.

4. Assistance in obtaining seed sludge to start-up the methane reactor (incl. in above)

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



5. Assistance on site in conducting performance test run:

1 trip, 2 weeks (7d/w).

Notes:

- The basic services as described above include travel and accommodation expenses.

- Additional services can be provided by GWE on site. Payable at our standard daily rates. E.g.

- Meetings for project kick-off, engineering discussions (after submitting basic engineering

package), engineering review meetings (e.g. constructability review with contractors),

progress meetings, intermediate inspections, assistance in permit procedures, etc.

- After preliminary commissioning and training, the client has to operate the plant under our

supervision and guidance, both on site and remote, until final plant acceptance. On request,

we can take over more on site operation tasks than indicated above, payable at our standard

daily rates.

Daily rates, 2010: 300.- Euro per day (“absence fee”; 10 h/d, 7 d/week)

+ all travel and accommodation expenses.

6.1.6 Other items

Insurances: GWE personnel are covered by an accident insurance valid worldwide. Possible

other required insurances are either not valid for GWE as designer/equipment supplier (not doing

construction work on site), or should be covered by others locally in line with local requirements

and regulations. Costs for such insurances should be foreseen by others.

6.2 Exclusions

Local Works, as listed in Chapter 7

Note: if local works done by others are delayed to the point that extra costs are occurring to

GWE, these costs will be charged extra. E.g. storage fees, idle time on site, delayed power

connection hook-up, etc.

6.3 Battery Limits

Battery limits for design, supply and/or construction, installation work, all services (incl. permit

related documents) are:

influent: at the inlet of screen S100

effluent: at the outlet of the effluent holding box B102A/B

sludge at the reactor D101A/B/C drain nozzles

chemicals: from storage tanks to dosing points

biogas: from reactor to flare + T-piece for connection to biogas user.

water: provided by the client at the entrance of the WWTP building

Electricity: client provides low tension to electrical cabinet GWE

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



6.4 Price

Total Price for above mentioned scope: …- Euro

6.5 Commercial conditions

Payment conditions (typical for supply of complete scope under §0; to be agreed):

30% downpayment at order

20% at supply of basic engineering package

50% at supply of the equipment and hardware, resp. at readiness to supply on

agreed date, by LC, proportional as per the value of the partial shipments,

against shipping documents and 10% performance guarantee to be released

at successful guarantee test run or ultimately 12 months after supply of all

the equipment and hardware, if the mechanical completion is delayed by

no fault of GWE.

No withholdings on payments.

Payable within 30 days, except for first payment at order (7 days)

Validity: 2 months

Supplies: CIF, nearest international seaport

Passing of Risk: The risk of loss or of damage to goods supplied passes to the client at the point

and moment of delivery, or after arrival on site in sealed containers or unopened

packaging.

Upon arrival on site, a formal inspection of quantity and quality (possible

damage) must take place at once, and any deviations reported in detail within 7

days after arrival. After 7 days, the goods are automatically considered accepted,

also without formal signed acceptance certificate. Alternatively, if agreed in

advance, goods arriving in a sealed container can remain under seal till arrival of

a GWE mounting supervisor, supervising the unloading of the container(s).

Mechanical guarantees

Mechanical guarantee for the equipment supplied is 18 months after arrival on site, or 12 months

after beginning of start-up (first wastewater intake), whichever comes first.

Time of delivery (typical):

- layout and civil guideline drawings: 4 weeks

- rest of basic engineering: 8 weeks

- detailed engineering: 12 weeks

- hardware supply: ca. 18 weeks

Starting from receipt of first payment (activation of the contract)

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



Delayed payments will result in corresponding delayed deliveries.

Intellectual Property Rights and Copyright:

This quotation and all attachments remain GWE property. In case of contract award, all

documents supplied will be protected under a User License agreement, allowing use for

construction and operation of one single plant. The User Licenses is to be signed at contract

award or latest at receiving the Basic Engineering Package if not included in the project before.

Without written agreement, it is not allowed to copy or duplicate any document from GWE, to

hand them over to a third party, or to make the contents available to anyone else.

By accepting this quotation, the recipient recognizes GWE’s intellectual property rights.

Date: 09 June 2010 DANNY DEFOUR

Proposal Engineer

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



GENERAL TERMS AND CONDITIONS

1. Unless expressly altered or modified in the body of the quotation or elsewhere in writing, the following terms

and conditions apply to this quotation and shall be deemed incorporated in and form part of the quotation upon

its acceptance.

2. Technical description of equipment, list of instruments and other technical details given in this quotation are

preliminary and the Company reserves itself the right of modifications during the design and engineering stage

in the interest of reliability and performance of the plant, and/or according to availability on the market. These

modifications will however not have any influence on the contract price nor on the given guarantees.

3. All quotations, offer and contracts are subject to changes caused by war, fire, strikes, transport delays shortened

hours of labor, accidents of any kind, Government controls or any other cause or contingency beyond the

control of the Company, whether of the same nature as the preceding causes or not and the Company shall not

be liable in any way for loss, damage, or delay resulting from or attributable to such causes. Each delivery to be

considered a separate contract, and a failure of any delivery shall not vitiate the contract as to others.

4. Prices contained in our quotation are based on current prices at the date of quotation for the cost of materials

(especially stainless steel), labor, freight, insurance, customs duty, primage duty and sales tax, together with

wharfage, clearing, handling and delivery charges. In the event of a significant rise in any of these rates, our

prices can be revised accordingly. The prices are also based on our suppliers standard conditions of sale and

their last known manufacturing and delivery costs, which are adjustable to those ruling at the date of delivery,

and any variation in which will be accounted for as above. Our quotation is based on conversion from foreign

currency to Euro currency, ruling at the date of quotation, unless otherwise specified. Should there be any

variation in these rates or charges at the time payments are made, such variations will be to purchaser’s account.

5. Value Added Tax is not included in the prices quoted unless otherwise stated and where applicable will be

additional to customer’s account.

6. Unless previously withdrawn, this quotation is open for acceptance for the period stated but when no period is

stated, then for a period of thirty days only from the date hereof.

7. Testing and inspection if required by the Buyer or his Agent, will be at our Works and will be final there. The

Company will not be responsible for further testing after such materials has left the works of manufacture.

8. This quotation includes only such goods, accessories and work as are specified herein. It is exclusive of

foundations, builder’s work, fuel and water required during erection and testing, and of any other plant, material

and service not specified.

9. Material proved to be defective and rejected will be replaced but the Company disclaims any responsibility for delay, workmanship, consequential damage or any other expense.

10. No claim for damage will be allowed unless the Company is advised within seven days of the receipt by the

Buyer of the goods and an opportunity is given to the Company to investigate the claim.

11. Delivery : When included, delivery is to be made only as specified by us, and there-after goods are at your risk.

Default and refusal on your part to take delivery shall be equivalent to delivery and acceptance.

12. Terms are strictly net except where otherwise stated. Unless otherwise arranged in writing, payment in full in

respect of any goods shall be due and made by Bank Draft, Bill of Lading or other negotiable documents and

time in this respect is the essence of the contract, upon dispatch from our works.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



13. If the contract is frustrated, and / or the goods in respect thereof cannot be delivered from any cause whatsoever,

it is expressly agreed that:

a. If any sum has been paid to the Company’s account by the Buyer and is repayable to him by operation of law the Company will be entitled to deduct there from all expenses incurred by it in connection with the

said contract, and

b. If no sum has been paid to account, the Buyer will be bound to pay the Company all expenses incurred by it

in connection with the said Contract.

14. The Purchaser shall not alter any equipment furnished by us or do anything that will in any way infringe,

impeach, or lessen the validity of the patents or trademarks under which our equipment hereunder are made or

sold.

15. These Conditions of Sale shall not be deemed to be waived or varied by any representation nor by any condition

included in the Purchaser’s order, unless the same is approved by us in writing

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



7. LOCAL PART =============

Not included in the scope of supply of GWE is the “local part”, to be arranged by customer

and/or the (end) client, is summarized as follows:

7.1 All local permits, for design, construction, operation, emissions.

Technical documents needed, are supplied by GWE.

7.2 Translations and interpreter services, if needed. All documents supplied by GWE are in

English. Some manufacturer vendor data, if available, also in the client’s language.

7.3 Detailed civil engineering. Must normally be local.

Optional: supply by GWE, based on European norms

7.4 Soil investigation and geological report.

7.5 Civil works and structural steel, including :

Site preparation (incl. fencing, temporary access roads and storage area) and

demolition works

Soil excavations and refill, incl. for underground process piping

Concrete sumps, basins, structures, equipment slabs, pipe rack foundations (if

applicable).

Coating works (by specialist contractor), where indicated above, for protection of

steel and concrete structures, sumps and basins.

Painting works where applicable, e.g. for carbon steel structures, for buildings

inside/outside. We suggest the whole concrete structure to be painted on the outside,

to match the factory surroundings.

Building (with doors, windows, floors, etc, lighting, + all its technical building

installations: water, drains, HVAC,…; with staircase to upper floor).

Gravitary plant sewers, building sewers and drains (underground)

Supply and installation of pipes or pipe sections embedded in or underneath

concrete structures and to be installed during civil works (supply, fabrication,

installation, testing).

E.g. Inlet pipe and sludge outlet pipe for a concrete clarifier. Or conduits for cables.

This will not be the case in this project.

Structural steel: stairs, ladders, railings, platforms, walkways, covers over pits and

access openings in concrete basins (in steel or in GRP if indicated as such), pipe

racks if applicable. Painted carbon steel, galvanized steel and/or stainless steel, as

specified or requested by the client.

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



Block-outs1 for later pipe transitions, to be closed with shrink-free concrete after

mounting of piping.

If applicable, core drilling for pipe transitions.

If applicable, cast-in wall transition pieces for piping and cabling. Fabrication,

supply, mounting.

Cast-in manholes, cast in concrete walls. Fabrication, supply, mounting.

QA and Testing, e.g. water and gas tightness; coating thickness

Access roads, pavements, landscaping, fencing, etc, if required.

Earthing, connections for potential bonding.

Lightning protection if required.

Outside plant and/or road lighting, if required

7.6 Supply, fabrication and installation of all piping systems: pipes, pipe supports, hand

valves and fittings, as well as some special materials (mainly piping related items, e.g.

couplings, strainers, compensators, sampling ports, vortex breaker, etc). Incl. supply of

supports, bolt, nuts, washers, anchor bolts, all in SS, and gaskets, welding rods, welding

gas, passivating paste, etc. Actuated control valves are part of the instrumentation

package.

Included in the piping is:

- reactor inlet distribution system

Optional on request: Material supply by GWE.

7.7 Supply of all equipment listed in Chapter 4, not quoted or supplied by GWE. This

comprises following equipment: F101, F103 (incl. vapor lock), F104

7.8 Erection, installation and mounting of equipment (imported + local), incl. supply of

(anchor) bolts in SS. All underwater fixations to be done with chemical anchor bolts.

7.9 Mounting of instrumentation and panels (our instruments engineer will advise/assists).

Fabrication and supply of supports as needed (e.g. local switches, locally mounted

transmitters), in case components can not be mounted on nearby walls. Complete with

bolts and nuts.

7.10 Supply and connect electrical and instrumentation cables, according to our detailed

wiring drawings. Incl. supply of galvanized cable trays and conduits, incl. fixation

materials (supports, bolts in SS).

This includes cabling between flare components and flare panel (= in main panel).

Optional on request: materials supply by GWE

1 Pipes transitions through concrete walls will be done using the block-out method. Block-outs are foreseen in the

concrete walls, and closed (by civil contractor) after mounting of the piping (with puddle flange (steel plate) supplied and welded to the pipe by the civil contractor).

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



7.11 Supply of PC computer system:

1 standard PC, with min.200 GB hard disk, 2 GB RAM, DVD burner, 4x USB, software

Windows Vista, MS Excel (MS Office)

1 LCD color monitor, 20" minimum

1 inkjet printer, 1 modem or preferably broadband internet connection.

1 UPS (if required).

7.12 Stock of recommended spare parts and consumables, according to list supplied 3

months before start-up.

7.13 Procurement/Transport/Preparation of anaerobic seed sludge material (under our

supervision).

7.14 Supply of chemicals (NaOH,…), nutrients, utilities (power, water), incl. water for water

tightness testing of tanks and basins.

7.15 Electricity and water during construction.

7.16 Furniture for control room and laboratory. Laboratory analysis equipment. See GWE’s

InfoSheet about analysis requirements and recommended equipment.

7.17 Local transport (to construction site) of imported equipment (approx. … x 40’ sea

containers), incl. safe storage. If use of second hand Shipper’s Owned Containers

(remaining on site as property of the client) are preferred, extra cost for buying

containers by GWE will be charged.

7.18 Unloading of containers and inspection of the goods supplied within 7 days after arrival.

7.19 All local (=in country of destination) taxes, duties and fees, for delivery and sales,

import, import clearance, permits, inspections, etc.. This includes value added tax, sales

tax, any withholding taxes, if applicable. Such taxes and fees paid by GWE for reasons

of procedures, will be charged. This includes possible VAT charged to GWE by local

subcontractors, which can be avoided or made recoverable to the client, by direct

invoicing by our subcontractor to our client, compensated by an equal reduction of

payments to GWE.

7.20 Project specific insurance cover, covering GWE if required by client. “Contractor’s All

Risk” Construction site insurance. GWE personnel is covered by an accident insurance.

7.21 Overall project and construction site management (supervision and coordination of all

activities on site), incl. during start-up period

9 June 2010

PROPOSAL PROJECT:


CLIENT: PLANT



7.22 All direct and indirect cost for inspections, performance testing, approvals, permits,

sampling, analysis, etc required by client or third parties and not mentioned to be

included in our scope. As well for the whole plant as for specific parts and components.

7.23 All other work related to the execution of the project, not included in the scope of GWE.

E.g. tagging and labeling.