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MBR Membrane- A New Technology Used In Watewater Treatment
- Jul 18, 2018 -

MBR membrane- a new technology used in watewater treatment

It is theoretically feasible to use a submeraged membrane bioreactor to treat livestock and poultry aquaculture wastewater. The experiment absorbs the traditional "anaerobic + aerobic" treatment process, and uses the submeraged bioreactor treatment technology to experimentally treat the wastewater generated by the pig factory, with the aim of providing engineering practice basis for livestock and poultry wastewater treatment.

1 Materials and methods

1.1 Pig farm wastewater

The experimental wastewater was taken from the high-concentration organic wastewater discharged from the “dry and wet separation system” pig farm. The wastewater volume was 60 m3 /d, the experimental wastewater water quality was COD=9 100 mg/L, BOD = 3 788 mg/L, SS: 4 490 mg/L, NH3-N = 450 mg/L.

1.2 Methods

The submeraged MBR treatment technology is a new membrane bioreactor that integrates a suction pump, an aerator and a bioreactor. The membrane module is placed directly in the bioreactor. The flow rate in the MBR reactor is provided by air agitation. The membrane module is placed in the MBR, and the sewage submerage membrane module is operated by suction of the self-priming pump using the suction negative pressure of the membrane filament lumen.

SUN's flat membranes are made of PVDF, which has better chemical stability, stain resistance and mechanical strength. The company uses an advanced grinding process to control the pore size of the membrane at 0.1μm and has a higher water production flux and effluent quality. The board is made of morise, and the diaphragm spacing is more stable, no side-mounted board is needed. When the diaphragm is installed, it can be installed from the top down or from the side, regardless of the construction site conditions. The laser engraved diamond-shaped flow channel, combined with a special umbrella-shaped support structure, makes the suction pressure distribution even, without the need for a flow guiding cloth, reducing the risk of fouling and making the water collection more rapid.

The MBR treatment tank is designed as an A/O treatment system: in the front section, the influent water in the influent and the back section is thoroughly mixed for biological denitrification and denitrification, biodegradation and nitrification in the latter stage, and alkali supplementation is used to supplement the alkali consumed by ammonia nitrogen nitration. Degree, the water is directly discharged after treatment, and if necessary, it can be further disinfected for reuse of water.

The purpose of the aeration of the blower is to provide the dissolved air and the turbulent water flow generated by the rising air bubbles to prevent the sludge from accumulating and keep the membrane flux stable. The excess sludge produced in the MBR is quantitatively raised by the stripping pump to the sludge drying tank, where the sludge is concentrated, and the sludge is reduced in volume, and the supernatant is returned to the conditioning tank.