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Process and apparatus for wastewater by batched membrane-bioreactor

A sewage treatment device and bioreactor technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., to achieve land saving, easy automatic control and operation and maintenance , The effect of shortening the operating cycle of the system

Inactive Publication Date: 2003-06-18
TSINGHUA UNIV
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  • Description
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Problems solved by technology

[0014] The purpose of the present invention is to provide a sequence batch membrane-bioreactor sewage treatment process and device for the deficiencies and defects of the sequence batch activated sludge method and membrane-bioreactor, which can be realized in a single The treatment unit effectively removes carbon-containing organic matter and nutrients such as nitrogen and phosphorus at the same time, and the system can obtain good effluent water quality, and the device has a simple structure, and can effectively control membrane fouling under the condition of providing low aeration. development, and at the same time can obtain higher membrane flux

Method used

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  • Process and apparatus for wastewater by batched membrane-bioreactor
  • Process and apparatus for wastewater by batched membrane-bioreactor

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[0052] Such as figure 2 As shown, within 1.5 hours of the inflow process, the raw water is pressurized by the water inlet pump, sprayed into the reaction tank through the water distribution pipe, and the activated sludge deposited at the bottom of the reaction tank is boiled and fully contacted with the raw water. At this time, the activated sludge is mixed The liquid is in an anaerobic state, and the organic pollutants in the raw water provide carbon sources for the denitrifying bacteria, and the denitrifying bacteria further reduce the nitrite nitrogen and nitrate nitrogen formed in the previous operation cycle to gaseous nitrogen (N 2 ), to achieve the removal of total nitrogen (TN). The phosphorus-removing bacteria decompose the polyphosphate in the body to produce ATP, and use ATP to take the organic matter in the wastewater into the cell, store it in the cell in the form of poly-β-hydroxybutyric acid and other organic particles, and decompose polyphosphate at the same t...

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Abstract

A process for treating sewage by integrating sequential active sludge method with membrane-bioreactor features that the membrane assembly is put in bioreacting pool, its outlet is respectively connected to air inlet pipe and water outlet pipe via two control valves, the whole system sequentially passes through flow-in, reaction, discharge and idle steps, that is, anaerobic, aerobic and anoxic states, and said membrane assembly plays the roles of aerating unit in reaction step or separator in discharge step. Its advantages are simple structure and high effect.

Description

technical field [0001] The invention relates to a water and wastewater treatment technology, in particular to a method and equipment for treating sewage by using a sequencing batch activated sludge process and a membrane-bioreactor, belonging to the technical field of water and wastewater treatment and purification. Background technique [0002] Known sewage biological denitrification and phosphorus removal processes, such as pre-type denitrification biological denitrification system (ie A-O process), anaerobic-aerobic phosphorus removal process (also known as A-O process), etc., generally treat nitrogen and phosphorus. cannot be effectively removed at the same time. Although people have also developed the baroxia-hypoxia-aerobic method (ie A-A-O or A 2 -O process) and other synchronous denitrification and phosphorus removal processes, but like the aforementioned two A-O processes, the system includes multiple treatment structures such as anaerobic tank (or anoxic tank), ae...

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Application Information

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IPC IPC(8): C02F1/44C02F3/30C02F9/02C02F9/14
Inventor 黄霞孙友峰文湘华
Owner TSINGHUA UNIV
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