Busan Suyeong Sewage Treatment Plant

Installation overview


Busan, South Korea

Commissioned / installed date:


Application and type:


Technology configuration used:

Hollow fibre

MBR technology / membrane product used:


Scale of installation:

Large-scale municipal

Capacity range MLD:


102 MLD

Primary consultant / contractor:

GS Engineering

About Busan Suyeong Sewage Treatment Plant

One of Korea’s largest MBRs incorporates a completely underground 100 MLD ZeeWeed MBR design, making room for a residential park.


As the second largest city in Korea, Busan is home to more than 3.5 million people. When the city decided to replace the aging Suyeong conventional sewage treatment plant (STP), it faced a number of challenges, including strict discharge effluent quality requirements and limited land area for construction.

Residents also called for a more environmentally friendly and sanitary facility, especially since the old Suyeong STP was now surrounded by a sprawling urban landscape. An increasingly common trend in Korea, the city decided to build the new STP completely underground with a residential park at ground level. It became part of the city’s 20-year three-phase infrastructure development plan to build/expand the Suyeong STP.

The most difficult design factor for phase I of the new STP was facilitating a 100,000 m3/day capacity STP in the limited underground area.


SUEZ Water Technologies & Solutions developed a three-process sewage treatment plant that includes pretreatment, bio-treatment, and membrane filtration. The compact ZeeWeed membrane bioreactor (MBR) system was chosen after a comprehensive analysis of performance, applicability, reliability, environmental impact, simple operation and maintenance, and constructability.

The system utilizes ZeeWeed MBR technology, which eliminates the need for large, costly concrete settling tanks that conventional wastewater processes rely on to separate contaminants from treated effluent. The ZeeWeed system occupies a fraction of the space to consistently produce tertiary-quality effluent that can be safely discharged to sensitive receiving bodies or reused for various non-potable applications.

The ZeeWeed MBR solution created for this project includes 120 membrane cassettes immersed in 12 membrane trains. The system eliminates the need for the secondary clarifier and tertiary filtration, has a smaller footprint than conventional alternatives, and boasts reduced construction costs.


The MBR process meets the effluent quality limit of 7 mg/L biological oxygen demand (BOD), 40 mg/L chemical oxygen demand (COD), 20 mg/L total suspended solid (SS), 20 mg/L total nitrogen (TN), and 2 mg/L total phosphorus (TP).

Meeting these strict limits was extremely important for the city; the effluent from the STP is discharged into the Suyeong River, which flows directly to the ocean near some of Korea’s most popular beach resorts.

ZeeWeed MBR technology will provide long-term performance reliability and continued environmental benefits at Busan, which looks to implement phase II and phase III of their long-term infrastructure development plan.

Image gallery

More information

Information on this page has been supplied by third parties and is not necessarily endorsed by The MBR Site. You must contact the third parties to confirm information is accurate and complete before acting upon it. The MBR Site accepts no responsibility for any action taken or costs incurred as a result of information on The MBR Site. The MBR Site accepts no responsibility for the content of third party websites. Any views expressed are those of the third parties and do not necessarily reflect the views of The MBR Site.

‘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: info@thembrsite.com

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.