Upgrading of water and waste water services
Detailed description of the Good Practice
Main task in the waste water section was the finalisation of the Waste Water Treatment Plant (WWTP) which was commissioned in March 1997. Other tasks done to improve waste water discharge and treatment were the construction of the sewerage pumping station, construction of the inlet and outlet to the WWTP and removal of the old WWTP. The bulk input has been made in the water supply area.
waste water management
Objectives of the Good Practice
The objective was to improve the water and waste water services of Cesis
Participants of the Good Practice
City of Cesis (initiator)
Target group of the Good Practice
Funding of the Good Practice
Total costs of the project equal 4,5 million EUR. The project was co-financed by NEFCO, Governments of Finland and Norway, EU Phare program funds, Latvian state investments, Cesis City council investment and Vinda’s internally generated funds.
More Details of the Good Practice
An iron removal plant with design capacity of 10,200 m3/d was constructed in 2001. Before the project the quality of delivered water was unsatisfactory due to high concentration of iron and manganese. The separation of iron is done by chemical flocculation and the concentration of iron in the treated water now equals 0.01 to 0,2 mg/l (before 0.22 to 3.2.). The Plant serves the needs of today but affects also the future as the water quality must meet the EU and WHO requirements. To secure that the treated water is not contaminated while it reaches consumers Vinda, the local water and waste enterprise, has flushed the entire network several times. Four new wells have been drilled and associated mechanical and electrical equipment installed in the wellfield instead of the old ones which had low efficiency and were disposed to contamination from floods. Now the wells are operated by the remote control system having link with the iron removal plant and the reservoirs. Within the project also the valves and hydrants have been replaced thus considerably reducing burst rate in water supply network. The level II pumping station has been refurbished including new pumps, suction and delivery pipework and simple MCC system to maintain pressure in the supply zone. Also the reconstruction of water reservoirs was implemented. Two water towers and a reservoir in pumping station were refurbished.
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Coordinator of Agenda 21
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Data sources and references
Baltic Cities Environmental Bulletin 1/2002