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Sewage Biological Treatment Method Based on Activated Sludge Fermentation

A sewage biological treatment and activated sludge technology, applied in water/sludge/sewage treatment, biological water/sewage treatment, sustainable biological treatment, etc., can solve the problem of small effect, achieve short operation time and low investment cost , the effect of simple operation

Active Publication Date: 2022-05-17
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The essence of the biological treatment process is a process of decomposition of organic matter involving microorganisms. The microorganisms that decompose organic matter are mainly bacteria, and other microorganisms such as algae and protozoa also participate in this process, but the effect is small.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for biological treatment of sewage based on activated sludge fermentation product, comprising the following steps:

[0027] (1) Carry out anaerobic precipitation treatment to the sewage to be treated to obtain the lower sludge and the supernatant;

[0028] (2) filtering the supernatant, adding sodium bicarbonate solution to the supernatant, keeping the temperature at 50-55° C. for 0.5-1 hour, and performing aerobic fermentation to obtain a mixed solution;

[0029] (3) The sludge is dried and pulverized, and then placed in an activation tank. Aeration and oxygenation equipment is arranged in the sludge activation tank to control dissolved oxygen at 7.5-8mg / L in the tank; Pre-activation, then activation, the total time is 3.5-4h; then add fermented starch, fish peptone, sodium chloride solution, fermentation filler and fermentation bacteria to the activation tank for fermentation to obtain activated sludge fermentation product;

[0030] (4) pump the mixed soluti...

Embodiment 2

[0040] A method for biological treatment of sewage based on activated sludge fermentation product, comprising the following steps:

[0041] (1) Carry out anaerobic precipitation treatment to the sewage to be treated to obtain the lower sludge and the supernatant;

[0042] (2) filtering the supernatant, adding sodium bicarbonate solution to the supernatant, keeping the temperature at 50-55° C. for 0.5-1 hour, and performing aerobic fermentation to obtain a mixed solution;

[0043] (3) The sludge is dried and pulverized, and then placed in an activation tank. Aeration and oxygenation equipment is arranged in the sludge activation tank to control dissolved oxygen at 7.5-8mg / L in the tank; Pre-activation, then activation, the total time is 3.5-4h; then add fermented starch, fish peptone, sodium chloride solution, fermentation filler and fermentation bacteria to the activation tank for fermentation to obtain activated sludge fermentation product;

[0044] (4) pump the mixed soluti...

Embodiment 3

[0056] A method for biological treatment of sewage based on activated sludge fermentation product, comprising the following steps:

[0057] (1) Carry out anaerobic precipitation treatment to the sewage to be treated to obtain the lower sludge and the supernatant;

[0058] (2) filtering the supernatant, adding sodium bicarbonate solution to the supernatant, keeping the temperature at 50-55° C. for 0.5-1 hour, and performing aerobic fermentation to obtain a mixed solution;

[0059] (3) The sludge is dried and pulverized, and then placed in an activation tank. Aeration and oxygenation equipment is arranged in the sludge activation tank to control dissolved oxygen at 7.5-8mg / L in the tank; Pre-activation, then activation, the total time is 3.5-4h; then add fermented starch, fish peptone, sodium chloride solution, fermentation filler and fermentation bacteria to the activation tank for fermentation to obtain activated sludge fermentation product;

[0060] (4) pump the mixed soluti...

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Abstract

A method for biological treatment of sewage based on activated sludge fermentation products, comprising the following steps: (1) performing anaerobic precipitation treatment on sewage to be treated to obtain lower sludge and supernatant; (2) filtering the supernatant Carry out aerobic fermentation to obtain a mixed solution; (3) dry and pulverize the sludge, then place it in an activation tank for fermentation to obtain an activated sludge fermentation product; (4) mix the mixed solution in step (2) and the activated sludge fermentation product in step (3) are pumped to the mixing tank for mixing; (5) the sewage treated in step (4) is introduced into the aeration tank; (6) the sewage treated in step (5) is introduced into the sedimentation tank (7) dehydrating the sludge discharged to the sludge thickening tank in step (6). The invention can treat sewage economically and efficiently, has simple treatment method, low cost and high removal rate.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage biological treatment method based on activated sludge fermentation products. Background technique [0002] Refractory organic matter in sewage takes a long time to decompose under natural storage conditions, causing a huge load on the environment. If the sewage is discharged without treatment, it will cause different properties and degrees of pollution to the water body, thereby endangering human health and affecting industrial and agricultural production. Sewage is toxic and irritating, and at a certain concentration, it will have toxic effects on organisms and microorganisms. In addition, it may also contain irritating and corrosive substances such as inorganic acids and alkalis. The concentration of organic matter is high, especially the concentration of various organic acids, alcohols, aldehydes, ketones, ethers and epoxides in petrochemical sewage, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34C02F3/12C02F101/10C02F101/16
CPCC02F3/308C02F3/34C02F3/1205C02F2101/105C02F2305/06C02F2101/16Y02W10/10
Inventor 罗海林陈琛黄珊汪元南蔡素燕吴艳丽
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP