ESSAESSA

A clear and clean environment for the pursuit of business - ESSA Co.,Ltd.

TECHNICAL PROCESSSewage & Wastewater Advanced Treatment Optimization Process

Embedded in Strip Phosphorus Type And Semi-Batch Advanced Treatment

CEO Message

History of ESSA

Since founded in 1993 ESSA owns exclusive water treatment technology, continuously investing in R&D to help further the environmental industry Based on this, we provide comprehensive one-stop service including environment based research, design, construction, maintenance and technology consulting in the water treatment field.

We successfully developed the ESSA process, a new concept of sewage advanced treatment that is the world’ best BNR(N,P) technology to pioneera new direction for the sewage treatment field.

We will research and make more effort in the future, as a company specializing in ecofriendly water treatment with people-centered management, we pledge to do our utmost at all times while sharing and with humility, providing a differentiated solution through diverse contents and flawless system.

In order to make clear and clean water with a people-centered, life-centered foundation, ESSA will be a company that creates a pleasant environment where people are one with nature.

Thank you.

President Yoon Yeong Nae

A company with outstanding professionalism and technology – ESSA.

Environment based research Construction

MaintenanceTechnology consulting

Design

OnestopTotal Solution 2010 Participate in Germany international environmental exhibition(IFAT ENTSORGA 2010)

Received the President award Acquired US patents for semi-batch sewage treatment and methods Designated as a Patent Star Enterprise Registered as construction business Acquired patent for automatic separation drainage device

2009 Seoul Office established

2008 Acquired patent for alternate discharge devices Registered as civil engineering business

2007 Renamed to ESSA Co., Ltd. Acquired patent for apparatus for treatmenting sludge of sewage and method of thereof Acquired patent for dephosphorizating reactor for treatment of sewage Acquired new environmental technology authentication No.222 and technology verification No.107

2006 Registered as water pollution prevention facility business Patented ESSA Method Application filed for international patent (PCT)

2004 Registered as facilities maintenance business Acquired patent for discharge system for clean water

2003 Registered as waterworks and sewage construction business

2002 Registered as waste water treatment facilities management services

2000 Gyeongbuk Environment Co., Ltd. established Registered as sewage treatment facilities engineering

1993 Gyeongbuk Sewage established

Development of ESSA ProcessThrough the biological super-high-degree BNR process, a perfect technology for phosphorus removal▶ 96.1% of Phosphorus(P) & 90.1% of Nitrogen(N)· No secondary environmental pollution due to biological process· No odor problems· No chemical process· No process costs· The world’s first developed decanter technology in the lowest water level (effluent water depth : less than 30 cm)· Solves the problems caused by phosphorus, nitrogen, and colon bacillus only through the microbiotics process· Super-highly-processed water fit for a water reuse system (Less than T-P : 0.2-0.5mg/L, T-N 5mg/L ◀ Current - standard N, P : 20, 2mg/L)

1. Optimum method needed to replace the existing ineffective wastewater treatment process2. Need to improve the efficiency of removing nitrogen and phosphorus of existing A2O, MBR and SBR series3. Started to develop a new concept of nitrogen (T-N) and phosphorus (T-P) removal technology4. Developed the best BNR (N, P) processing technology in the world level

· Proven to be the world's best advanced BNR processing system in terms of efficiency· Performance

0504

Background of new-technology development Verification results of New Excellent Technology recognized by the Ministry of Environment

Verification and certification of New Excellent Technology

ESSA Advanced Wastewater Treatment Process

· Title : Advanced wastewater treatment technology using intermittent overflow type embedded phosphorus release tank and water level connected semi-batch reactors (ESSA)

· Process

Itemconcentration (mg/L)

Removal Efficiency(%)min.~max. (average)Effluent quality

standards Influent

min.~max. (average)Effluent

min.~max. (average)BOD Under10 104.0~267.0 (188.1) 0.4~3.8 (2.0) 97.1~99.7 (98.9)

CODMn Under40 49.2~109.1 (73.2) 3.6~10.2 (7.1) 79.3 ~ 95.2 (90.2)SS Under10 94.0~380.0 (175.5) 0.4~2.8 (1.2) 97.5~99.8 (99.3)

T-N Under 20 22.2~49.2 (30.0) 1.5~4.6 (3.0) 85.8~96.3 (90.1)T-P Under 2 3.17~7.63 (5.1) 0.05~0.43 (0.2) 86.8 ~99.2 (96.1)

ESSA TECHNICAL PROCESS

*�In the case of the operation mode, the inflow capacity, inflow quality, water temperature, and certified water quality may be modified to meet the optimized capacity.

Design StandardsParameter Conditions

Hydraulic Retention Time (hrs) - Phosphorus release tank : 1.7 - Submerged sludge thickener : 1.6- Reaeration tank : 1.7 - Semi batch reactor : 10.4

Effluent water depth (m) 0.19 ~ 0.25Solids Retention Time (days) 20 ~ 40Sludge return rate (%) 10 ~ 30F/M ratio (kgBOD/kgMLVSS.d) 0.02 ~ 0.07MLSS (mg/L) 3,000 ~ 5,000

Continuousinflow

Embedded Phosphorus release tank

Decanter

Decanter

Water-level connected semi-batch reactor B

Water-level connected semi-batch reactor ARAS 0.1~0.3

Submerged sludge

thickenerReaeration

Tank

The world’s best BNR (N, P) technology, ESSA Process !!

0706 ESSA Advanced Wastewater Treatment Process

ESSA TECHNICAL PROCESS

Core process and operation system

Process operation system (Total 6 cycles / day)

1 Cycle4 Hour

1 Mixing / 1 Aeration 2 Mixing / 2 Aeration Settling Decanting

Settling Decanting 1 Mixing / 1 Aeration 2 Mixing / 2 Aeration

Mixing stage : Inflow, changing the flow into A and denitrificationAeration stage: Inflow, nitrification and luxury uptake of phosphorus Settling stage : Solid-liquid division of sludge Decanting stage: intermittent disposal

A: (Mixing +aeration) twice(2Hr) / When(settling+decanting)(2Hr) B: (Settling + decanting)(2Hr) / When(mixing+aeration) twice(2Hr)

Mixing+Aeration

Mixing+AerationSettling Mixing+Aeration

Settling DecantingA

B

Mixing+Aeration

Decanting

1 Hour 2 Hour 3 Hour 4 Hour

Influent InfluentEffluent

Effluent

Influent Influent

RAS RAS RAS RAS

12 Times effluent per day

World's best wastewater treatment technology & BNR (N,P) process

1. Intermittent-overflow-embedded Phosphorus Release Tank

2. Submerged sludge thickener 3. Reaeration tank

5. Decanter

4. Water-level-connected semi-batch reactor

Operated in the process of equal division and intermittent mixer and intermittent-overflow type of continuous sewage water flowing in through the high-density anaerobic-sludge layer's bottom

Induces a continuous high-density sludge concentration to maintain continuous sending to the phosphorus release tank Connection and control of the water level of

1st and 2nd semi-batch reactors

Development of the world's first low-water-level decanter

Connection of the water level through the step-by-step inflow of sewage and mixer connected semibatch reactors' excellent nitrogen removal effect

• Up-flow sewage fundamentally resolves odor problem • Maintenance of the high-density anaerobic-sludge blanket• Decreased shock load• Selection of an intermittent mixer and intermittent overflow• Maximization of phosphorus release and operation-cost-cutting

• Continuous settling down of the overflow sludge from the reaeration tank ▶Controlling the return mass of the flow-in• Disposal of sludge with excessive phosphorus

• Maximized nitrification and phosphorus absorption by maintaining consistent aerobic conditions

• MLSS spontaneous control of 1st and 2nd semi-batch reactors

• Selection of the seesaw type ▶ Minimizes the maintenance cost and breakdown

• All-in-one decanter control ▶ Minimizes the needed power

• Three-dimensional overflow device ▶ Stable disposal of treated water

• Use of stream switch device ▶ Induce injection of sewage by stage

• Operation by mode, inducing denitrification / nitrification by stage depending on water temperature

Mixer Stopped

sewage + RAS sewage + RAS

Mixer in Operation

Using an Intermittent-overflow-embedded Phosphorus Release Tank and Water Level Connected Semi Batch ReactorsAdvanced Wastewater Treatment Process

ItemPower usage to the

processing capacity (kW/m3)Quantity of sludge(kgDS / kgBOD / day)

Maintenance costs per ton (USD/m3)

H Company method (SBR) 1.87 1.20 0.19K Company method (A2O) 1.52 1.8 0.16

A Company method (MBR) 1.33 0.63 0.14ESSA method 0.94 0.41 0.10

0908 ESSA Advanced Wastewater Treatment Process

ESSA TECHNICAL PROCESS

Advantage of the ESSA Process

Low maintenance costs.

Excellent N,P removal efficiency and stable water quality

Up-flow sewage fundamentally resolves odor problem

Development of the world's best low-water-level seesaw-type decanter

Differentiated online unmanned remote control and monitoring system

· Only biological treatment can dispose of sewage very well to lessen sludge and recycling the sludge· Reduced power consumption by 2 to 3 times compared to other methods and reduced quantity of sludge by 1.5 to 3 times

· Introduction of step-by-step denitrification in sewage : Maximal removal of nitrogen through continuous nitrification and denitrification· Possible to maintain stable processing quality albeit changes in the water flow and shock load (underload, overload)· Maximal removal of phosphorus by added phosphorus release tank

· Improved water quality and protection of the ecosystem by innovatively improving the efficiency of nitrogen / phosphorus treatment

· Simple installation with a compact structure while saving on initial facility costs with minimized space taken · Exceptional removal of nitrogen and phosphorus with only biological treatment, making secondary treatment or additional costs unnecessary

· Able to use all treated water as reusable water

· Up-flow sewage passes through the sludge blanket layer to completely remove odor by enzyme degradation

· Minimal movement through the maintenance of a low effluent water depth (less than 30 cm) and safe water quality

· PLC, unmanned remote control system enabling a compact process with constant monitoring and control of the process regardless of location

Technical adaptability

Application Fields

Technical expectation

Water quality Maximization of theremoval of N-P

Preparation for total amount restriction, sewagereuse and determination of the legal basis

Decanter MiniaturizationUnification

Easy maintenance and energy efficiency

Method ofconstruction Compact Easy installation, improvement, and repair

Process control AutomationEasy operation - Remote control and

monitoring system

· Advanced Wastewater Treatment Sewage & wastewater treatment / Leachate treatment / Food waste leachate treatment / etc..· Industrial Wastewater Treatment· Wastewater reuse· Improvement of existing facilities

*�1USD = 1,165KRW, unit power cost (By korea power cost )

1110 ESSA Advanced Wastewater Treatment Process

ESSA TECHNICAL PROCESS

ESSA Process Applications Intellectual properties and awards

· Presidential citation Received the 15th Environmental Technology President Grand Award from the Korea Government

· United States Patent No. US 7,674,380 B2· New Excellent Technology (NET) authentication No. 222· Environmental Technology verification No. 107

·Patent No.10-0563449 Apparatus for treatmenting of sewage using semi-batch and method thereof

·Patent No.10-0768571 Dephosphorizating reactor for treatment of sewage

·Patent No.10-0800529 Alternate discharge device

·Patent No.10-0786354 Apparatus for treatmenting sludge of sewage and method of thereof

·Patent No.10-0453116 A discharge system for clean water

Application sites Raw waterPilot Plant (50m3/day) Sewage Guji-ri village sewage treatment plant (48m3/day) Sewage Naenam village sewage treatment plant (48m3/day) Sewage Hwangsan village sewage treatment plant (70m3/day) Sewage Cheonbuk industrial complex sewage treatment plant (1,100m3/day) LeachateGreen Bird Golf Links sewage treatment plant (200m3/day) SewageWoonggok village sewage treatment plant (30m3/day) SewageHak-ri village sewage treatment plant (83m3/day) SewageJukjang Sangok village sewage treatment plant (180m3/day) SewageJukjang Ibarm village sewage treatment plant (140m3/day) SewageDaebon 1, 2-ri village sewage treatment plant (110m3/day) SewageNajeong-ri village sewage treatment plant (110m3/day) SewageSongseon village sewage treatment plant (100m3/day) SewageMilgu village sewage treatment plant (60m3/day) SewageBangnae village sewage treatment plant (70m3/day) SewageMoryang village sewage treatment plant (210m3/day) SewageYeondong village sewage treatment plant (60m3/day) SewageDonggang eco-information center sewage treatment plant (70m3/day) SewageSuseungdae tourism complex sewage treatment plant (400m3/day) SewageTaepyeong District Rural Village Sewage Treatment Plant(90m3/day) SewageAntaeri Hospitals Sewage Treatment Plant (350m3/day) Sewageetc.

Jusang villagesewage treatment plant (50m3/day)

KRTECleachate treatment plant (100m3/day)

Daebon 3-ri villagesewage treatment plant (90m3/day)

Chungun-dongleachate/ food waste treatment plant (163m3/day)

Samcheok marine rail bike gungchon stationsewage treatment plant (110m3/day)

Seosan techno valleyWaste water treatment plant (3000m3/day)

ESSA CO., Ltd#588 Dongcheon-dong, Gyeongju-si, Gyeongsangbuk-do, KoreaTel : +82-54-741-2188 Fax : +82-54-775-0895

A/2008 20F Samhomulsan B/D 275-1 Yangjae-dong, Seocho-gu, Seoul, KoreaTel : +82-2-589-2220 Fax : +82-2-589-2218

e-mail : essa2188@hanmail.net / www.essawater.com

Gyeongju

Seoul

Korea

Sep.

201

0. D

esig

ned

by B

izPlu

s AD

Inc.

ww

w.b

izplu

sad.

co.k

r