The DynaSand® was the best fit for this application because it has a proven record of producing very low phosphorous levels on a consistent basis
Fort Lauderdale, FL (PRWEB) November 08, 2012
Parkson has implemented an energy-efficient phosphorous removal system at a membrane bioreactor (MBR) plant in South Korea to help achieve some of the tightest standards for phosphorous removal in the world.
The installation at the wastewater treatment plant is the first of its kind to pair an MBR system with the new DynaSand® EcoWash™ sand filtration technology, which offers huge energy savings over traditional sand filters.
"The DynaSand® was the best fit for this application because it has a proven record of producing very low phosphorous levels on a consistent basis," said Marianna Novellino, Product Manager for ENR and Filtration at Parkson. "Additionally, the plant is benefiting from the new DynaSand® EcoWash™ configuration, which keeps reject water and energy costs as low as possible."
The installation in Korea consists of 10 DynaSand® EcoWash™ filters, divided into two cells which process the flow from two separate membrane bioreactor units. Unlike traditional filters that operate on a continuous backwashing schedule, the EcoWash™ design relies on intermittent backwashing to achieve high quality filtrates with minimal energy use.
This wastewater treatment plant posed a unique setting for the DynaSand®, because the membrane bioreactor system produces a very low level of suspended solids which makes phosphorous precipitation and flocculation more difficult. Another challenge was the alkalinity of the effluent water, which limits the amount of chemical addition to meet the minimum pH limit of 6. Despite these challenges, the DynaSand® EcoWash™ can successfully maintain adequate flocculation and remove phosphorous to the required level of <0.3 mg/l with a Poly Aluminum Chloride (PAC) addition, while meeting the pH requirements. Notably, the DynaSand® achieves these results without the benefit of additional residence time or equipment between the chemical addition and the filters. The chemical is injected in the feed pipe, passing through a static mixer, and into the filters where flocculation and separation occur.
The design at the plant also includes a Lamella® gravity plate settler to treat reject water from the DynaSand® to further reduce the overall reject flow from the filter system.
Amid changing regulations for effluent standards around the world, there is great need for enhanced nutrient removal (ENR) systems like the DynaSand® EcoWash™, which can provide consistent results in a cost-effective way.
About Parkson Corporation:
With 25,000 installations in its 50 years of existence, Parkson Corporation is a leading provider of advanced solutions in water recycling and treatment and is committed to providing clean water for the world. Headquartered in Fort Lauderdale, with offices in Chicago, Montreal, Dubai, Mumbai and partners in Latin America and Germany, Parkson is an Axel Johnson Inc. company. To learn more, visit http://www.parkson.com.