Three-stage AO sewage treatment process

A treatment process and sewage treatment technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., which can solve problems such as large investment and substandard sewage

Inactive Publication Date: 2021-03-09
SATERI JIUJIANG FIBER CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The glycolic acid recovered can be used for industrial purposes such as detergents; but the investment is relatively large, and it is not suitable for industrial production. Then the inventor tried anaerobic aerobic process method to treat the sewage produced by sodium carboxymethyl cellulose and found that the cost It can be greatly reduced, but there is a problem that the treated sewage is not up to standard

Method used

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  • Three-stage AO sewage treatment process

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Embodiment Construction

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described implementation Examples are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] Please refer to figure 1 , which shows a flow chart of a three-stage AO sewage treatment process of the present application, which is suitable for sewage treatment in the production of sodium carboxymethylcellulose (CMC).

[0020] In step 101, the sewage is pretreated, poured into a micro-electrolyzer, added with electrolytic...

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Abstract

The invention discloses a three-stage AO sewage treatment process which comprises the following steps: pretreatment: pouring into a micro-electrolysis cell, adding an electrolysis filler, and electrolyzing after excessive oxygen passes through the micro-electrolysis cell; primary aerobic treatment: treating the pretreated sewage through a first aerobic tank; primary anaerobic treatment: treating the sewage subjected to primary aerobic treatment through a primary anaerobic tank; secondary aerobic treatment: treating the sewage obtained by the primary anaerobic treatment through a second aerobictank; the method comprises the following steps: firstly treating sewage through pretreatment, simply treating ss, BOD, COD and N-hexane through electrolysis, then carrying out three-stage AO treatment, further treating pollutants in the sewage by utilizing microorganisms, and finally ending by using Fenton oxidation treatment, so that the sewage reaches the discharge standard.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a three-stage AO sewage treatment process. Background technique [0002] Sodium carboxymethyl cellulose (CMC) is an important product of cellulose ethers. It is a derivative of natural cellulose through chemical modification. It can be used as food additives, flocculants, chelates, emulsifiers, thickeners, Water-retaining agent, film-forming material, etc., are widely used in food, household chemicals, ceramics, electronics, leather, plastics, pesticides and other fields. The only pollutant produced during the production of sodium carboxymethyl cellulose is the waste liquid after distillation and recovery of ethanol. The chemical oxygen demand (COD) of the waste liquid is very high, reaching 50,000-100,000 mg / L. It takes about 1 ton of CMC to produce 2.5 tons of waste liquid are generated. The pollution of the waste liquid to the environment is very serious, and how to deal with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30C02F103/36
CPCC02F9/00C02F2305/026C02F1/46104C02F3/30C02F1/725C02F1/722C02F2101/30C02F2103/36
Inventor 彭善俊徐朝辉王兵付敏波马驰张彬姜术丹兰伟宝高磊张文涛
Owner SATERI JIUJIANG FIBER CO LTD
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