Efficient sewage COD (chemical oxygen demand) treatment method

A treatment method and technology for sewage, applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor biodegradability, high toxicity, technical lag, etc., and achieve sludge volume Small, clear and transparent water quality, low cost effect

Inactive Publication Date: 2016-03-09
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the domestic environmental protection industry currently lags behind in this kind of sewage treatment technology, with the development of the chemical industry, the ecological environment has been seriously affected. The chemical wastewater produced by it has a high concentration of COD, high toxicity, and poor biodegradability. It is difficult to achieve treatment by ordinary processes. expected effect

Method used

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  • Efficient sewage COD (chemical oxygen demand) treatment method
  • Efficient sewage COD (chemical oxygen demand) treatment method
  • Efficient sewage COD (chemical oxygen demand) treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0020] The steps of the high-efficiency wastewater COD treatment method are as follows:

[0021] (1) Domestication: First put the hydrolyzed acidifying bacteria into the bottom mud of fish ponds, after one week of domestication, gradually add a set concentration of wastewater containing quaternary ammonium salt and N and P nutrients to make them domesticated ;

[0022] (2) Anaerobic hydrolysis and acidification treatment: After the hydrolysis and acidification bacteria are domesticated and the film is stabilized, the sewage and hydrolysis and acidification bacteria are added to the anaerobic bioreactor for anaerobic hydrolysis and acidification treatment, and regular sampling and analysis are performed, and the COD rapid determination method is used to determine COD value of sewage;

[0023] (3) Aerobic biological contact oxidation treatment: the sewage after anaerobic hydrolysis and acidification is added to the aerobic biological contact oxidation reactor for aerobic biological co...

Embodiment 1

[0028]

[0029] experimental method:

[0030] (1) Add quantitative glucose and sodium acetate solution or dilute to municipal sewage with known COD concentration to prepare sewage with specific COD concentration.

[0031] (2) Carry out experiments according to the specific implementation methods according to the parameters in the chart.

[0032] (3) Determine the pH, COD concentration and turbidity of the inlet and outlet water.

Embodiment 2

[0034]

[0035] experimental method:

[0036] (1) Add quantitative glucose and sodium acetate solution or dilute to municipal sewage with known COD concentration to prepare sewage with specific COD concentration.

[0037] (2) Carry out experiments according to the specific implementation methods according to the parameters in the chart.

[0038] (3) Determine the pH, COD concentration and turbidity of the inlet and outlet water.

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Abstract

The invention discloses an efficient sewage COD (chemical oxygen demand) treatment method, relating to the field of sewage treatment. The efficient sewage COD treatment method adopts the four steps of domestication and biofilm formation, anaerobic hydrolysis acidification treatment, aerobic bio-contact oxidation treatment and flocculation treatment and is low in cost; secondary pollution is avoided by adopting microorganisms to decompose sewage; compared with conventional chemical treatment methods, the treatment method has the advantages that the sludge amount is smaller; the COD of the treated sewage is less than 100mg / L; the water is clear and transparent and completely reaches the wastewater discharge standards.

Description

Technical field [0001] The present invention relates to the field of sewage treatment, and more specifically, the present invention relates to a high-efficiency COD treatment method for sewage. Background technique [0002] Chemical oxygen demand (COD) is one of the important indicators to evaluate the degree of wastewater pollution. It uses a chemical method to measure the amount of reducing substances that need to be oxidized in water samples, including wastewater, wastewater treatment plant effluent and polluted water. The oxygen equivalent of a substance that can be oxidized by a strong oxidizer. With the development of industrialization, especially in oil refining, petrochemical, printing and dyeing, papermaking, leather and other industries, COD is also an important parameter for sewage water quality monitoring. [0003] As the domestic environmental protection industry currently lags behind such sewage treatment technology, with the development of the chemical industry, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/5236C02F1/56C02F3/02C02F3/28C02F2209/08
Inventor 何丹农董毅林琳章龙
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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