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Method for producing acetic acid by utilizing sludge fermentation

A technology of sludge and acetic acid, applied in the field of environmental biology, can solve problems such as inaccurate numbers

Inactive Publication Date: 2012-01-18
ZHEJIANG SHUANGLIANG SUNDA ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These so-called "processing" and "disposal" are basically estimated under specific conditions, strictly speaking, the above figures are not very accurate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Heat treatment and activation of anaerobic digested activated sludge: air-dry anaerobic digested activated sludge, grind, sieve, and kill non-spore methanogens at high temperature; take heated anaerobic activated sludge and add glucose nutrition Activated in solution for a period of time;

[0016] Get the pretreatment liquid of above-mentioned sludge to adjust pH to be 9, seed sludge concentration is 2 gVS / L reactor operation 10 days, from the 11th day, add 1g / L lactose every day, until fermentation finishes.

Embodiment 2

[0018] Heat treatment and activation of anaerobic digested activated sludge: air-dry anaerobic digested activated sludge, grind, sieve, and kill non-spore methanogens at high temperature; take heated anaerobic activated sludge and add glucose nutrition Activated in solution for a period of time;

[0019] Get the pretreatment liquid of above-mentioned sludge to adjust pH to be 10, seed sludge concentration is 4 gVS / L reactor operation 10 days, from the 11th day, add 1g / L lactose every day, until fermentation finishes.

Embodiment 3

[0021] Heat treatment and activation of anaerobic digested activated sludge: air-dry anaerobic digested activated sludge, grind, sieve, and kill non-spore methanogens at high temperature; take heated anaerobic activated sludge and add glucose nutrition Activated in solution for a period of time;

[0022] Get the pretreatment liquid of above-mentioned sludge to adjust pH to be 11, seed sludge concentration is 8 gVS / L reactor runs for 10 days, starts from the 11th day, adds 2g / L lactose every day, until fermentation finishes.

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Abstract

The invention discloses a method for producing acetic acid by utilizing sludge fermentation, which belongs to the technical field of environmental biology. Obsolete municipal sludge is used as a raw material, and a fed-batch fermentation method is used to obtain a high-value-added product acetic acid. In the method, the problem of pollution of degradable objects in the obsolete municipal sludge to the environment can be solved, and simultaneously the high-value-added product acetic acid is obtained. Through optimization, the yield of the acetic acid is up to 8.87g / L.

Description

technical field [0001] The invention discloses a method for producing acetic acid by fermenting sludge, which belongs to the field of environmental biotechnology. Background technique [0002] With the acceleration of urbanization in my country, the rate of urban sewage treatment has increased year by year, and the amount of sludge produced by urban sewage plants has also increased sharply. At present, there are more than 450 urban sewage plants that have been built and operated in my country, with an annual treatment capacity of 63.9×10 8 m 3 . According to the calculation that the sludge production accounts for 0.3%~0.5% of the sewage treatment volume (water content 97%), the annual sludge production of urban sewage plants in my country is 1916.4×10 4 m 3 and 3194.0×10 4 m 3 between. According to estimates, the amount of sludge (dry weight) discharged by urban sewage treatment plants in my country is about 130×10 4 t, and is growing at a rate of more than 15% p...

Claims

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Application Information

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IPC IPC(8): C12P7/54
Inventor 郑展望荆政
Owner ZHEJIANG SHUANGLIANG SUNDA ENVIRONMENTAL PROTECTION CO LTD
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