CMF plant commissioned at Hungarian power station

Memcor has installed a continuous microfiltration (CMF) plant to pretreat water for a reverse osmosis (RO) plant at the Bokod power station near Budapest, Hungary. Zenon Systems Kft, a Hungarian subsidiary of Zenon Environmental Inc. of Canada, supplied the RO unit.

Water for boiler feed at the Bokod station is drawn directly from a cooling lake which suffers from high turbidity, primarily due to algae, which is detrimental to the operation of the RO plant. Conventional pretreatment methods were considered, but Memcor`s membrane technology was selected for its ability to remove suspended solids and algae down to 0.2 microns in one barrier filtration step.

The CMF process uses polypropylene microporous hollow fiber membranes in conjunction with a patented gas backwash sequence to remove accumulated particles from the membrane surface. The feed flow passes from the outside to the inside of the hollow fiber to maximize filtration surface area.

The Hungarian system uses self-cleaning screens to remove large solid particles and a raw water feed tank. Two microfiltration units with standby feed pumps produce a flow of 44 cubic meters an hour in standby mode or 88 cubic meters an hour in parallel mode.

Pacific Power of Australia has also recently chosen Memcor CMF technology for its Eraring power station. The project, now under construction, will treat wastewater from a sewage pipeline, treat it, then reuse it in the power plant.