Parkson implements phosphorous removal system at membrane bioreactor plant in Korea

01 November 2012

Parkson has implemented an energy-efficient phosphorous removal system at a membrane bioreactor 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 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 less than 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.

For more information, visit the company website.

‘The MBR Site’ is a trading division of Judd and Judd Ltd, a company registered in England and Wales, registered number 8082403.

Registered office: Suite 2, Douglas House, 32-34 Simpson Road, Fenny Stratford, Buckinghamshire, MK1 1BA, United Kingdom. Email:

Banner image: full treatment plant for pharmaceutical wastewater in Taizhou, Linhai Park, Zhejiang Province, China, including Shanghai MEGAVISION  flat sheet UF membrane modules in two MBR units. Image courtesy of VALORSABIO, Lda.

Image credits:

– Image for our Chinese largest plants 全球最大的MBR项目 homepage link: Image supplied by Apex Environmental
– Image for our Consultants and Contractors homepage link: Image supplied by Ovivo USA, LLC.

Disclaimer: The information given on this website is reproduced in good faith. No liability is accepted for errors or omissions. The MBR Site does not endorse any products, services, organisations, events or any other listing included in this site. You are strongly advised to check all information, including specifications and installation details, before acting on any information given in this website. The MBR Site links to third-party websites – note that we are not responsible for the content of third-party websites and third-party websites are visited at your own risk. Please read our terms and conditions and privacy policy. Use of this website indicates acceptance of these conditions.

This website is designed for modern browsers – if you have problems viewing our website, you may wish to upgrade your browser.