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Sewage treatment process

A sewage treatment and process technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as high external environmental conditions, achieve good water quality, accelerate growth and reproduction , the effect of strong adaptability

Inactive Publication Date: 2017-05-10
DUJIANGYAN EMPRESS TECH CO LTD
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Problems solved by technology

However, since the CASS process uses activated sludge, there are microorganisms in the sludge, and the reaction between microorganisms and pollutants requires a relatively high external environmental condition.

Method used

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  • Sewage treatment process

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Embodiment Construction

[0006] The present invention will be further described in detail below in conjunction with the flowchart.

[0007] Each CASS reaction pool is composed of three parts, namely the bacterial group selection area, the facultative oxygen area and the main reaction area. The flora selection area is set at the front of the CASS pool, which is a small volume pool (about 10% of the total volume of the reactor), and most of the selection area works under anaerobic or facultative oxygen conditions.

[0008] Use the sludge return pump to pump the sludge from the main reaction area and mix it with the new sewage, which not only can

[0009] The activated sludge can be quickly adsorbed, and it can also speed up the removal of dissolved substances, and it can also remove refractory substances

[0010] Play a better role in the replacement, of course, can also effectively release the phosphorus in the sludge under anaerobic conditions.

[0011] Setting the bacterial group selection area bef...

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Abstract

The present invention relates to a sewage treatment process, which comprises a grating, a hydrolysis regulation pool, a lifting pump and a CASS pool, wherein the grating, the hydrolysis regulation pool, the lifting pump and the CASS pool are connected, the remaining sludge in the CASS pool is pumped into the hydrolysis regulation pool through a reflux pump, the sludge in the hydrolysis regulation pool is periodically discharged out, each CASS reaction pool comprises three parts such as a flora selection zone, a facultative zone and a main reaction zone, the flora selection zone is arranged on the front end of the CASS pool and is a small volume pool, most part of the selection zone works in the case of anaerobic or anaerobic condition, the main reaction zone sucks one part of the sludge through sludge reflux to the selection zone, and the sludge sucking amount is the same as the amount of the sludge in the main reaction zone after one circulation. According to the present invention, with the sewage treatment process, the sewage flows into the pretreatment zone, and the active sludge enhances the absorption and the attachment on organisms in the good case while the advantageous environment is provided for accelerating the growth and the reproduction of microorganisms so as to limit the effective breeding of filamentous fungus.

Description

technical field [0001] The invention relates to a sewage treatment process. Background technique [0002] At present, the CASS process is mainly used in sewage that needs denitrification and phosphorus removal, sewage with a high concentration of organic matter that does not use anaerobic treatment, and sewage that has been treated after anaerobic treatment, such as sewage from living quarters, yeast, printing and dyeing textiles, Production wastewater in light industry, pharmaceutical and other industries. However, because the CASS process uses activated sludge, there are microorganisms in the sludge, and the reaction between microorganisms and pollutants requires a relatively high external environmental condition. Therefore, how to stabilize the technological process to ensure the quality of wastewater treatment and reduce the cost of sewage treatment is very important. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the pre...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 吴强
Owner DUJIANGYAN EMPRESS TECH CO LTD
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