Membrane biological treatment technology (MBR) wastewater treatment process:
Raw water→grid→regulating tank→lifting pump→bioreactor→circulating pump→membrane module→disinfection device→medium water storage tank→medium water water system
Sewage through the grid into the regulating tank through the lifting pump into the bioreactor, the PLC controller to turn on the oxygenation of the aeration machine, bioreactor The effluent from the bioreactor enters the membrane separation unit through the circulating pump, the concentrated water returns to the regulating tank, and the water separated from the membrane is chlorinated and disinfected (sodium hypochlorite, bleach, chlorine tablets) through the rapid mixing method, and then enters the medium water storage tank.
The backwash pump utilizes the treated water in the cleaning tank to backwash the membrane treatment equipment, and the backwash effluent returns to the conditioning tank. The water level in the bioreactor controls the opening and closing of the lifting pump.
The membrane unit's filtration operation and backwash operation can be controlled automatically or manually. When the membrane unit needs chemical cleaning operation, close the water inlet valve and sewage circulating valve, open the medicinal washing valve and medicinal agent circulating valve, start the medicinal liquid circulating pump, and carry out chemical cleaning operation.
Expanded Information
Membrane biological treatment technology applied to wastewater recycling, with the following characteristics:
(1) can efficiently carry out solid-liquid separation, the wastewater in the suspended substances, colloidal substances, biological unit loss of microbial flora and has been purified water separated. Separation process is simple, covers an area of small, good quality of effluent water, generally can be reused without three-stage treatment.
(2) can make biological treatment unit biomass to maintain a high concentration, so that the volumetric load is greatly improved, while the high efficiency of the membrane separation, so that the treatment unit hydraulic retention time is greatly shortened, and the footprint of the bioreactor is reduced accordingly.
(3) As it can prevent the loss of various microbial flora, it is conducive to the growth of slow-growing bacteria (nitrifying bacteria, etc.), so that the system of various metabolic processes are carried out smoothly.
(4) It makes the residence time of some large molecules of difficult to degrade organic matter longer, which is favorable to their decomposition.
[5] Membrane treatment technology and other filtration and separation technology, in the long-term operation process, the membrane as a filtration medium clogging, membrane through the amount of water through the running time and gradually decline in effective backwashing and chemical cleaning can slow down the decline in the membrane flux, to maintain the effective service life of the MBR system.
(6) MBR technology used in municipal wastewater treatment, due to its simple process, easy to operate, can realize the fully automatic operation and management.
Baidu Encyclopedia - Wastewater Treatment Process