Method for producing reclaimed water by membrane bioreactor-ozone combination technique
A membrane bioreactor and combined process technology is applied in the field of reclaimed water production that removes chromaticity from urban domestic sewage, which can solve the problems of limited application scope and removal, and achieve the effect of thorough organic pollutants and ammonia nitrogen.
Active Publication Date: 2011-09-28
BEIJING ORIGINWATER TECH CO LTD
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Problems solved by technology
However, since urban sewage contains a variety of color-forming substances and pathogenic microorganisms, if the sewage after secondary treatment is not further decolorized and disinfected, even if the membrane bioreactor method is used, the application range of it as a regenerated water resource will also be limited. It will be greatly restricted, so it is also necessary to remove the color and disinfection of the supernatant after membrane separation
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[0012] An example is given below. The example is used in an urban sewage treatment plant with a daily treatment capacity of 30,000 tons of comprehensive domestic sewage. The membrane bioreactor system consists of 24 membrane modules. The specific implementation method is: the comprehensive domestic sewage enters the aerobic pool 2 through the regulating pool 1 and reacts for 2.5 hours to remove most of the organic pollutants, and then enters the membrane bioreactor 3 to remove ammonia nitrogen and further remove organic pollutants in the water, the membrane bioreactor 6000-8000mg / L of activated sludge is maintained in reactor 3, the residence time of sewage in reactor 3 is 3 hours, the gas-water volume ratio is 18, the ratio of water outlet time to stop water outlet time is 7:1, and the water outlet cycle is 7 Minutes; the clear liquid after membrane separation is drawn out from the membrane filament by the self-priming pump 4 and enters the decolorization tank 5, the ozone com...
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Abstract
The invention relates to a method of utilizing biological film reactor-ozone combined process to produce the regenerated water, the biological film reactor-ozone is to integrate the film separation technique with the traditional biological treatment technique organically to produce high-quality clean liquid with almost zero suspended substance: the biological film reactor contains active sludge, the intermittent operation of self-suction pump is adopted for water discharge, the clean liquid after film separation is pumped from the film silk into the de-coloring pond by the self-suction pump, the ozone comes from the ozone generator, and is dispersed into the water by disk type micro-hole gas distributor arranged at the bottom of the de-coloring pond. The invention has the function of reducing water discharge chroma of biological film reactor, and is in particular suitable for the occasions where the sewage of urban life is utilized to produce high-quality regenerated water.
Description
technical field [0001] The invention belongs to a sewage advanced treatment method in water treatment, in particular to a regenerated water production method for removing chroma in urban domestic sewage. Background technique [0002] With the rapid development of my country's economy, the consumption of water resources has doubled. On the one hand, it has caused a shortage of water resources, and at the same time, it has also increased the generation of sewage, and increased the pressure on sustainable development of society and the environment. For this reason, relevant parties have invested A large amount of funds have been spent on treating sewage and reusing it as a resource, which has made great progress in sewage treatment technology. [0003] Membrane bioreactor technology is a new type of reclaimed water production method developed in recent years. This process combines membrane separation technology with traditional sewage biological treatment technology, and replace...
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IPC IPC(8): C02F3/12C02F1/78
CPCY02W10/10
Inventor 文剑平梁辉杨建州陈亦力
Owner BEIJING ORIGINWATER TECH CO LTD