IVAR's object is to build and operate joint municipal treatment plants for water, sewerage and solid waste.The company's vision is to ensure that the region benefits from the market's most competitive services.

Sources and water treatment

Transport facilities Landfills Composting Wastewater

treatmentGeneral

maintenance

Operations Marketing anddevelopment

Managing director

Board of directors

Supervisory board

Planning/construction

Finance/Administration

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Owned by eleven municipalitiesIVAR is owned by the following municipalities: Finnøy,

Gjesdal, Hå, Klepp, Kvitsøy, Randaberg, Rennesøy,

Sandnes, Sola, Stavanger and Time. Together, these

municipalities have approximately a quarter million

inhabitants.

This region is one of the most active in the country

in terms of the economy and demographic trends.

Development of the technical infrastructure is a key

prerequisite for this activity.

A total of 84 IVAR employees were responsible for

a turnover of approximately NOK 280 million in 2003.

A challenging future IVAR has achieved exellent results. However, IVAR is

facing demands of increasing the efficiency within the

scope of handling wastewater, water and solid waste.

Our response to these challenges is to further

develop the regional cooperation, both in width and

in depth. The goal is to ensure that regional objectives

and a long-term perspective continue to play a key

role in our industry.

IVAR is at work 24 hours a day

Organisation chart

IVAR's facilities

Water main

Raw water tunnel

Municipal borders

Wastewater main

Our drinking water is subject to the most

stringent requirements for hygienic water

quality – a quality you can taste! IVAR

supplies the entire Jæren region with the

highest quality drinking water.

Plenty of water - good waterWater is the most important element of our nutrition.

Drinking water is basic for all human activity. Traditionally,

we have had good access to water in Norway, and we

have developed a culture in which plenty of pure, clean

water for everyone is taken for granted.

IVAR's responsibility for water sources, water treat-

ment and transport to the respective municipalities

requires huge investments and reliable technical

solutions. Distribution to the consumers takes place

through the municipal water distribution system.

Sources for drinking waterThe primary sources for water supply to the Jæren region

are located in the municipalities of Bjerkreim, Gjesdal and

Hå. Stringent environmental demands apply to the water

source areas. Governmental restrictions on farming and

traffic ensure the raw water quality.

A small power plant has been built into the tunnel

from Stølsvatn lake to exploit the downward gradient

of the water flow from source to water treatment plant.

The water treatment plants are located at Langevatn

lake in Gjesdal municipality and in Matningsdal in Hå

municipality.

The water quality at the sources has low water

hardness. The water has low colour index and low

contents of humus and nutrients. IVAR perform

analysis (limnology) of the water sources regularly.

The best drinking water comes

from your tap

The highest requirement for water qualityThe Langevatn water treatment plant has the capacity

to treat 2500 litres of water per second. CO2 is added

to the water upstream the marble filters to increase

release of lime from the marble.

As a nutrient, drinking water is subject to stringent

quality requirements. All water delivered from Langevatn

is passed through alkaline filter material and disinfected.

Both the process and water quality are continuously

controlled and assured.

An absolute requirement for all drinking water is

that it must be hygienically safe. Good drinking water

is without noticeable smell, taste and colour.

30-km water mainIVAR's water supply system consists of three main

components: Transport facility for raw water, the

Langevatn and Matningsdal water treatment plants

and the transport system for drinking water.

The new water main extends approximately 30 km

from Langevatn lake to Tjensvoll. The water main has

a diameter of 1400 and 1200 mm. Valve chambers

have been established along the main, allowing the

water to be shut off or diverted, and this is where

the municipalities have their distrubution points.

IVAR's water mains are designed and engineered

to safely transport water for at least 100 years.

The Langevatn water treatment

plant supplies drinking water to

nearly a quarter million people.

Orstad valve chamber.

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IVAR receives and treats about 90 % of all

wastewater from the joint municipalities.

Our goal is to ensure that discharges of

wastewater do not harm rivers or the sea.

Treating wastewater – for the benefit of the environmentIn the areas along the coastline in the southern point

of Norway, focus has traditionally been on removal of

phosphorus and particles in the wastewater. Most of the

major wastewater treatment plants along the coastline

– including IVAR's plant in Randaberg – are therefore

based on chemical precipitation (primary precipitation).

Norway is obliged through the EEA Agreement to

comply with the treatment requirements in the 1991

Urban Waste Water Directive. IVAR's goal is to accomplish

this, using costeffective and environmentally beneficial

solutions.

SNJ – one of Norway's largest wastewater treatment plantsThe Regional Wastewater Treatment Plant of Nord-Jæren

(SNJ) receives and treats wastewater from residentials

We treat wastewater – for a sustainable environment

and industry in the municipalities of Randaberg,

Stavanger, Sola, Sandnes and Gjesdal.

The design capacity is equal to a total number of

inhabitants and population equivalents (PE) of appro-

ximately 240 000. The plant is located at Mekjarvik in

Randaberg. The wastewater treatment facilities are located

in rock while the sludge treatment, administration

building and workshop facilities are located outside the

rock. The plant was put in operation in March 1992.

The plant comprises an 8-km inlet tunnel from

Bjergsted in Stavanger, as well as a 4-km outlet tunnel

to Håsteinfjorden with discharge at a water depth of

80 metres, 1.2 km offshore.

The plant is constructed as a primary precipitation

plant where the wastewater is mechanically pretreated in

screens and aerated grit chambers. Chemicals are induced

to initiate precipitation. Produced particles are deposited

in sedimentation tanks. Two separate trains ensure a high

level of operational flexibility.

Produced pellets used for soil improvementOne of Norway's national objectives is to ensure that as

much as possible of the nutrient content in the sludge

generated at the wastewater treatment plants, can be

returned to the soil.

The sludge from the sedimentation tanks consists of

95 % water, which means that the dried solids

content amounts to just 5 %.

The solids content after centrifugal

dewatering and thermal drying is about

85 %. The dried product is formed into

small pellets (biopellets) that are simple

to store, handle and transport. The final

product is pathogenfree and meet the

governmental standards for recycling.

35-km main sewerThe wastewater is transported from Gjesdal in south via

Sandnes and Stavanger to the wastewater treatment

plant in Randaberg. The transport system consists of

gravity flow lines, pumping stations with associated

pump lines and tunnels.

The inlet tunnel from Bjergsted in Stavanger has

a diameter of 3.5 metres. The tunnel has a volume of

77 000 m3 and functions as a equalization resorvoir.

Additional wastewater treatment plantsThe Vik wastewater treatment plant, which receives and

treats wastewater from Time and Klepp municipalities, is

a biological plant. Phosphorus and organic substances

are removed from the wastewater in an activated sludge

process – bacteria do the job of cleaning the wastewater.

The Oltedal wastewater treatment plant receives

wastewater from the residents of Oltedal and process

water from industrial activities in the area. This plant is

a combined biological and chemical plant.

The Bore wastewater treatment plant receives

wastewater from the residents of Klepp municipality

and industry. The plant performes mechanical treatment

in sieves, and is designed for 20 000 equivalents (PE).

The same applies to the Sirevåg wastewater treatment

plant, which receives and treats wastewater from

residents and industrial activities in the Ogna and

Sirevåg areas. The plant’s designed capacity is 15 000 PE.

The sludge from Vik and Oltedal plants is transported

to SNJ in Mekjarvik.

Process controlIVAR's different plants are distributed over a large

geographic area. Several of the plants have relatively

complicated processes. Computer-based control and

monitoring systems are applied for safe and efficient

operation.

1. Sedimentation basin, SNJ

2. Regional Wastewater Treatment Plant, Nord-Jæren

3. Biopellets

4. Vik Wastewater Treatment Plant

5. Sentral control room at SNJ

IVAR receives and processes solid waste

from municipalities' waste disposal services.

IVAR works with a number of private and

public organisations with the objective of

ensuring improved exploitation of solid waste.

Less waste to landfills – more to recyclingFor many years, the Sele landfill was the largest facility

of its kind in Norway. In 1997 we received nearly 140 000

tonnes of waste at the landfill.

As a consequence of our work to exploit our resources

better, we now see that the volume of residual waste

ending up at the landfill has been substantially reduced.

In 2004 we expect to receive of about 30 000 tonnes of

residual waste. The recycling rate for household refuse

in the IVAR region will then be well above 90 %, which

means that the overall recycling rate exceeds the national

goals set for 2010. We are demonstrating Norwegian

waste management policy in practice.

Requirements for the solid wasteIVAR's discharge permit from the County Governor

of Rogaland has strict requirements for the residual

waste at the landfill. Waste can only be disposed

when there are no recycling options.

We transform your refuse into

valuable resources

1. and 2. The Sele landfill receives solid waste from the IVAR

municipalities.

3. Gas collection facility at Sele landfill.

4. The Sele recycling station receives sorted waste.

5. The Hogstad composting plant makes nutrient-rich compost

out of food and garden waste from the entire Jæren region.

Incineration of gas to reduce global warming"Landfill gas" is formed when organic waste decomposes.

The main components of this gas are methane and

carbon dioxide. Methane is about 20 times more harmful

than carbon dioxide in respect to global warming (the

"greenhouse effect").

Therefore, we collect the landfill gas and ensure

that it is incinerated, converting the methane gas into

carbon dioxide.

Incinerating the gas from Sele provides benefits to

the invironment equivalent to avoiding the emission

from 20 000 cars.

This gas is a high-quality energy source which should

not be wasted. There is a potential at Sele to deliver

25–30 million KWh of power per year for many years

to come. The gas is sold to Klepp Energi for exploitation

as a heat source.

Improving the environment at the landfillIVAR has done much to reduce the burden on the

environment in the areas surrounding the landfill.

Norway's largest bird net – 90 000 m2 – covers the

active landfill area to keep birds away. The bird net

additionally prevents plastic and paper from beeing

spread outside the landfill area.

Proper compression of the waste and regular

inspections keep vermin away.

Rain that runs into the landfill and becomes polluted

(leachate), is collected in a network of pipelines in the

bottom of the fill. The leachate is routed out into the

North Sea in open waters about 600 m from land at a de-

pth of 15 m. These discharges are monitored and the

surrounding areas show no signs of pollution damage.

Recycling station for sorted wasteAt Sele and Forus recycling stations, private customers

and businesses can deliver sorted waste and garden

waste. Processed compost can also be purchased from

Forus, Sele (garden and park waste) and Hogstad

(biowaste/garden and park waste). The compost is

well suited as a soil conditioner or as ground cover

to prevent the growth of weeds.

One of Europe's most modern composting plantsIVAR owns and operates the Hogstad composting plant

located in the municipality of Sandnes. This is Norway's

largest composting plant; handling as much as 28 000

tonnes of food and garden waste each year from

approximately 250 000 residents of the Jæren region.

The result of this process is 14 000 tonnes of nutrient-

rich compost.

The composting conditions in the plant are optimal

– with respect to moisture and temperature. The entire

process takes place indoors in a fully automatied,

computercontrolled composting hall of about 3500 m2.

The compost is sifted and matured to ensure

good quality.

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Incineration of the gas.

Norway’s largest bird net.

10

Energy is recovered from residual waste. The

energy is used for production of electricity

and district heating for customers in Sandnes,

Sola and Stavanger. The plant is situated on

IVAR's site at Stokka in the municipality of

Sandnes while the incineration plant is owned

by IVAR IKS, Lyse Energi AS and Energos ASA.

Together, the three companies have formed

Forus Energigjenvinning KS.

Valuable use of resourcesWaste that previously ended up in landfills, now

represents useful resources when converted into energy

through an environmental friendly process. By using

the energy resources from waste, we can reduce demands

of energy from alternativ sources.

The Stokka plant processes approx. 40 000 tonnes

of residual waste per year – producing 86 GWh thermal

energy in the form of superheated water. The water is

delivered to Lyse Energi and is distributed as district

heating.

The energy exploitation rate will be somewhat higher

than 50 % in the first few years, then gradually increasing

The energy recovery plant – part of Forus Miljøpark

Forus Energigjenvinning's recovery plant

at Stokka is constructed on a site that

is zoned for this purpose. The plant is

centrally located in relation to the waste

sources in the region, and has major en-

ergy consumers located nearby.

All in all, the region now offers a

full range of services that fully comply

with all national requirements relating

to waste management. The recovery

rate will be about 90 %.

to 70–80 % as the district heating distribution system

is developed. The plant will be in contineus operation,

and will produce energy equivalent to the consumption

of about 4000 homes.

What kind of solid waste is used by the plant?The waste that goes to energy recovery is residual waste

after valuable materials have been sorted out. The

majority of the waste is residual waste from households,

while a smaller portion comes from trade and industry.

Why is it important to reduce consumption of oil and electricity for heating?For Forus, the development of district heating and

exploitation of energy recovered from solid waste will

contribute to reduced consumption of fuel oil by the

businesses in the area. The transition to district heating

will reduce the need of electricity.

District heating is an environmental friendly and

progressive method of supplying heat that will help

contribute to less pollution.

IVAR IKS • Breiflåtveien 16/18 • StavangerP.O.Box 8134 • 4069 Stavanger

Telephone +47 51 90 85 00 • Fax +47 51 90 85 01E-mail: ivar@ivar.no • www.ivar.no

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