RO Membranes' Protection At Pinghu Power Plant, China

A power plant in Pinghu, Zhejiang Province in China needed to replace the use of chemical biocides and protect boiler feed make-up water from anaerobic and aerobic bacterial growth and associated biofouling.

The Pinghu plant uses a multiple barrier treatment approach consisting of clarification, mechanical filtration, activated carbon filtration, micron filters, and reverse osmosis (RO) filtration to treat incoming source water from the Jiaxing Tang River with UV transmittance values of 80%. The plant injects NaOCl (sodium hypochlorite) before the clarifier and is used to inject biocide before the guard filter to protect the RO from biofouling.

Atlantium’s HOD™ (Hydro-Optic Disinfection) UV technology was installed in April 2018 to accommodate a flow rate of 430 m3/hr. Since then, the facility has achieved non-chemical boiler-feed make-up water disinfection, using this environmentally friendly and sustainable approach.