Medical wastewater treatment case
Project Overview
This project mainly handles medical wastewater discharged from the outpatient building. The outpatient building wastewater discharge volume is 200m3/d.
Membrane module model GM96-1218, quantity 5 sets, 480 square meters.
The design influent and effluent water quality of this project is shown in the table below:
Process Flow
This hospital wastewater treatment project uses GMBR technology, operating continuously 24h per day. The process flow is shown in the figure below:
After sedimentation and water quality and quantity adjustment, the wastewater enters the membrane bioreactor. Organic matter is degraded by microorganisms within the membrane system, purifying the water quality. The membrane's main function is to retain activated sludge, macromolecular organic matter, and bacteria within the reactor, ensuring the effluent water quality meets discharge requirements. Simultaneously, it maintains a high sludge concentration within the reactor, accelerating the biochemical reaction. The water exiting the membrane bioreactor is the treated effluent.
Technical Advantages
This project uses CPVC flat sheet membranes with a nominal pore size of 0.25μm. This pore size is far larger than the average virus particle size (200nm), meaning the membrane itself cannot retain viruses. However, virus removal is significant in the filtration effluent tests of the membrane pool. Therefore, during the wastewater filtration process of the GMBR flat sheet membrane, a dense biofilm layer forms on the membrane surface, reducing the pore size and achieving virus removal.
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