Rijnmond Energie power plant, Rotterdam - The Netherlands

Since August 2001, "Rijnmond Energie" utilizes a 790-megawatt (MW) natural gas-fired, combined heat and power facility that is located in an industrial zone of Rotterdam, The Netherlands.

The power plant needs a high volume and very good quality of process water to supply the entire facility. The produced water will supply cooling tower water and boiler feed water at this new gas-fired power plant.

The water source is brackish water taken directly from the harbour of Rotterdam, containing high and variable amounts of solids and total suspended solids as well as oil traces.

Veolia Water Solutions & Technologies, through its subsidiary VWS Rossmark, has installed the compact Actifloc^TM plant in order to supply the entire power facility with process water.

The Actifloc^TM plant consists of four identical lines capable of producing in total up to 1,280 m³ /h of high quality process water. With the raw water (brackish water) coming directly from the harbour of Rotterdam, the Actifloc^TM plant significantly reduces the turbidity of the water and removes any oily pollutants.

After treatment in the Actifloc^TM plant, the water has a superior quality and can be used as cooling water directly whereas the water used as boiler water undergoes further treatment consisting of microfiltration by Cartridge filters 5 µm and Clarify filters for oil absorption, reverse osmosis and CDI (continuous de-ionisation).

The Actifloc^TM plant combined the proven clarification technology, Actiflo^TM and a gravity media filter in one prefabricated, fully automatic unit.

The water is initially screened before it is chemically treated and filtered in the Actifloc^TM plant. The chemical treatment is based on coagulation using iron chloride and enhanced flocculation using polymer and microsand.