Location: Bangladesh, Siliguri, Bidadi, Goblej
Capacity: 250, 600, 250 & 880 m3/day
Commissioned: 2011 - 2014
Technology: Membrane bioreactor (MBR)
A leading beverage manufacturer was looking to expand its effluent treatment plant (ETP) capacity at four of its facilities and also implement a solution to enable wastewater reuse. The wastewater at these sites have high biochemical oxygen demand (BOD), and chemical oxygen demand (COD), both of which had to be reduced to meet reusable standards.
SUEZ developed a solution involving MBR technology that can achieve consistent effluent quality of BOD <5 mg/L and turbidity <0.5 NTU; conventional effluent treatment typically achieves BOD <30 mg/L. MBR requires a compact footprint compared to conventional treatment and minimizes construction costs. ZeeWeed 500D membrane modules and cassettes were provided. Depending on the specific application and design requirements, a ZeeWeed MBR plant can achieve high quality nitrified effluent.
Major components of the system include a mechanical fine screen (2 mm), bioreactor tank, biological process blowers, chemical feed system, and membrane tank with accessories for installing the ultrafiltration (UF)
In the ZeeWeed MBR process, the membrane cassettes are immersed directly in the mixed liquor in the membrane tanks. A membrane train is a treatment unit consisting of multiple cassettes that are manifolded together, installed in a concrete tank (i.e. membrane tank), and connected to a common permeate pump.
High quality effluent from the ZeeWeed MBR system meets California Title 22 and similar regulatory requirements and is ideally suited for non-potable reuse applications. Fewer processes, combined with a highly automated programmable logic controller (PLC), makes plant operation less labour intensive and much more straightforward.
After commissioning SUEZ’s treatment solution, all four sites achieved lower BOD, COD, and turbidity values. The treated water quality was fit for reuse. These projects were the first MBR projects implemented by SUEZ Water India.
To learn how SUEZ can help solve your wastewater challenges, contact your SUEZ representative or visit us at www.suezwatertechnologies.com.