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Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater

An optimized distribution and refractory technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve poor treatment effect, insufficient impact capacity of industrial wastewater, high treatment cost, etc. problems, to achieve the effect of solving carbon source shortage, improving biodegradability, and improving nutrition

Inactive Publication Date: 2012-07-04
NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current treatment methods used in the production of high-concentration refractory urban sewage are A+A 2 O. Contactor + ordinary aerated activated sludge method, Aubert oxidation ditch, two-stage method, Carrousel oxidation ditch, aeration tank adding powdered activated carbon, etc. Some of these methods have insufficient ability to deal with the impact of industrial wastewater , some treatment effects are not good, especially the removal and nitrification of organic matter, and some treatment costs are relatively high. To some extent, these methods have certain defects

Method used

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  • Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater
  • Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater
  • Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater

Examples

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Effect test

Embodiment 1

[0016] Example 1: High-concentration refractory industrial wastewater is first hydrolyzed and acidified through the coarse screen and the hydrolytic acidification regulating tank, and then the effluent is combined with urban domestic sewage. After the mixed sewage passes through the fine screen and the sedimentation tank, 90% of the mixed sewage enters a section of biological The effluent from the first biological pool enters the first sedimentation tank, the effluent from the first sedimentation tank and the other 10% mixed sewage enter the second biological pool, the effluent from the second biological pool enters the second sedimentation tank, and the effluent from the second sedimentation tank is discharged. 80% of the sludge in the first-stage sedimentation tank and the second-stage sedimentation tank is returned to the respective biological pools. The hydraulic retention time of a biological pool is controlled at 0.5-3 hours, the sludge age is controlled at 1-5 days, the ...

Embodiment 2

[0017] Example 2: High-concentration refractory industrial wastewater is first hydrolyzed and acidified through coarse screens and hydrolytic acidification adjustment tanks, and then the effluent is combined with urban domestic sewage. After the mixed sewage passes through fine screens and sedimentation tanks, 90% of the mixed sewage enters a section of biological The effluent from the first biological pool enters the first sedimentation tank, the effluent from the first sedimentation tank and the other 10% mixed sewage enter the second biological pool, the effluent from the second biological pool enters the second sedimentation tank, and the effluent from the second sedimentation tank is discharged. 80-100% of the sludge in the first-stage sedimentation tank and the second-stage sedimentation tank is returned to the respective biological pools. The coagulant is added to the outlet of the second-stage biological pool to reduce the organic load and realize chemical phosphorus re...

Embodiment 3

[0018] Example 3: High-concentration refractory industrial wastewater is first hydrolyzed and acidified through coarse screens and hydrolytic acidification adjustment tanks, and then the effluent is combined with urban domestic sewage. After the mixed sewage passes through fine screens and sedimentation tanks, about 50% of the mixed sewage enters the first stage Biological pool, the effluent from the first biological pool enters the first sedimentation tank, the effluent from the first sedimentation tank and the other 50% mixed sewage enter the second biological pool, the effluent from the second biological pool enters the second sedimentation tank, and the effluent from the second sedimentation tank is discharged. 100% of the sludge in the first-stage sedimentation tank and the second-stage sedimentation tank is returned to the aeration tank. Coagulant is added to remove phosphorus at the effluent of the second-stage biological pool. The hydraulic retention time of a biologic...

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Abstract

A system for reasonably optimizing and distributing carbon source in the treatment of refractory wastewater consists of at least one section of biological tank and at least one section of sedimentation tank which are sequentially connected, wherein refractory industrial wastewater or urban wastewater partially or completely enters the biological tank sectionally according to a ratio, the effluentof the biological tank enters the sedimentation tank, and the effluent of the biological tank is discharged; and sludge in the sedimentation tank partially or completely reflows to the biological tank. The invention has stronger impact-resistant and load-bearing capability, sectional inflowing, flexible operation, good treatment effect and relative low cost, and is applicable to treatment of urban wastewater with high ratio of chemical wastewater, complicated wastewater composition and large treatment difficult in municipal sewage.

Description

Technical field: [0001] The invention belongs to the technical field of environmental protection sewage treatment, and in particular relates to a method for rationally optimizing and distributing carbon sources to treat refractory waste water. Background technique: [0002] Due to the rapid economic development of our country and the vast territory and unbalanced development, the proportion of industrial wastewater in the municipal sewage of some small and medium-sized cities and towns is relatively high, some are more than 50%, and even most of them are industrial wastewater. Industrial wastewater from dyestuffs, pharmaceuticals, textile / printing and dyeing, chemicals, etc. has high concentration of pollutants, high toxicity, substances that inhibit microbial growth, poor biodegradability, and is difficult to be biodegraded. It is very difficult to treat urban sewage containing a high proportion of this kind of refractory industrial wastewater. The general biological treatm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 陈立郭兴芳李成江徐宝祥
Owner NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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