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Biological decrement treatment technology for expanded sludge

A technology for bulking sludge and sludge, applied in the field of environmental pollution control, can solve the problems of poor sedimentation, high water content, difficult dehydration, etc., and achieve the effects of strong affinity, improved dehydration performance, and simple and convenient operation.

Active Publication Date: 2020-08-11
CHENGDU INST OF BIOLOGY CHINESE ACAD OF S +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high moisture content, poor settling property and difficult dehydration in bulky sludge, the present invention provides a method for dehydration and weight reduction of bulky sludge by using microorganisms, so as to realize the environmental protection treatment of bulky sludge

Method used

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  • Biological decrement treatment technology for expanded sludge
  • Biological decrement treatment technology for expanded sludge
  • Biological decrement treatment technology for expanded sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Demonstration of the effect of treating bulk sludge produced by a petrochemical PTA enterprise

[0056] The excess sludge produced by a company producing PTA after treating sewage is bulky hazardous waste sludge. In the untreated case, the sludge settling ratio was 99%. After 24 hours of standing and settling, the bulked sludge is concentrated, flocculated and filtered by a belt filter press, and the moisture content of the obtained mud cake is still as high as 92%.

[0057] The composite microbial seed solution optimized by using the bulk sludge to be treated is prepared according to the above method. 5m generated by the above-mentioned PTA manufacturers 3 The bulky excess sludge (water content 99%) was added to the reaction tank, and then 150L of the optimized composite microbial seed solution was added (the volume of the optimized composite microbial seed solution was 3% of the bulk sludge volume), and then 15g / LFeSO 4 ·7H 2 O, after fully mixing, tu...

Embodiment 2

[0059] Example 2: Demonstration of the effect of treating bulk sludge produced by a biopharmaceutical enterprise

[0060] A biopharmaceutical company mainly produces biopharmaceuticals from human blood. The sedimentation ratio of the sludge liquid after standing in a 100mL graduated cylinder for 24h was used as the test index. In the case of untreated, the sedimentation ratio of bulk sludge produced by the enterprise's sewage treatment is 98-99%. After 24 hours of standing and settling, the bulk sludge is dewatered by a belt filter press, and the moisture content of the obtained mud cake is still as high as 93%, which needs to be treated as hazardous waste.

[0061] The optimized composite microbial seed solution of bulk sludge was prepared according to the above method. 25m generated from the MBR pool of the above-mentioned biopharmaceutical enterprises 3 The bulky excess sludge (with a moisture content of 98%) was put into the sludge biological treatment tank, and then 35...

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Abstract

The invention belongs to the field of environmental pollution treatment, and particularly relates to a biological decrement treatment technology for expanded sludge. According to the specific technical scheme, the composite microbial flora at least comprises autotrophic microorganism leptospirillum, mixotrophic acidophilic microorganism thiobacillus and heterotrophic acidophilic microorganism at the same time. The composite microbial flora and FeSO4 are inoculated into expanded sludge to be treated, and aeration treatment is carried out until the pH value of the sludge liquid is 2-3, thereby the treatment is completed. A specific culture medium does not need to be independently prepared for each microorganism, so that the culture cost is low; acid does not need to be added before reactionto adjust the pH; and additional addition of sulfur powder is not required. Microorganisms in the composite microbial flora provided by the invention can grow synergistically, so that the composite microbial flora has strong adaptability to sludge and grows quickly; and the technology is simple and convenient to operate and has obvious dehydration and reduction effects on expanded sludge.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, and in particular relates to a biological weight reduction treatment technology for bulking sludge. Background technique [0002] With the large-scale application of activated sludge method in sewage treatment, the output of by-product excess sludge has also increased sharply; if the excess sludge is not properly treated and disposed of, it is easy to cause secondary pollution to the environment. Excess sludge is a bacterial micelle floc formed by a variety of microorganisms and their metabolites, residual organic and inorganic pollutants, etc. It has a relatively stable bacterial micelle network structure, good hydrophilicity and dispersibility. Due to the large amount of toxic and harmful substances in industrial sewage and unbalanced nutrition, the excess sludge produced by activated sludge treatment of sewage is often manifested as bulky sludge (especially common in sewage treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F11/06C02F11/148C02F101/30
CPCC02F11/02C02F11/06C02F11/148C02F2303/06C02F2101/30
Inventor 王晓梅梁开新李大平丁士淮
Owner CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
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