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Sludge treatment method of alkali treatment coupled single-chamber microbial electrochemical system

A technology of microbial electrochemistry and treatment method, which is applied in the field of sludge treatment, can solve the problems that the remaining sludge cannot be completely decomposed, and achieve the effect of increasing the concentration of organic matter and improving the degradation efficiency

Active Publication Date: 2020-07-03
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pretreatment cannot achieve complete decomposition of the remaining sludge

Method used

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  • Sludge treatment method of alkali treatment coupled single-chamber microbial electrochemical system
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  • Sludge treatment method of alkali treatment coupled single-chamber microbial electrochemical system

Examples

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Effect test

Embodiment 1

[0024] A sludge treatment method for alkaline treatment coupled with a single-chamber microbial electrochemical system, the specific steps are as follows:

[0025] (1) Alkali treatment of sludge: Collect samples of excess sludge from sewage treatment plants, import 1000 mg of excess sludge from the sludge inlet of the alkali treatment tank into the alkali treatment tank, measure the pH value with a pH meter, and determine the pH of the original excess sludge The value is about 6.5. While the agitator is stirring continuously, add NaOH (2mol / L) through the acid-base adjustment port of the alkali treatment tank to adjust the pH value of the remaining sludge to 12, and keep it at room temperature for 14 hours;

[0026] (2) Construction of a single-chamber microbial battery: Take 100 mg of raw sludge (containing mature strains) in the secondary sedimentation tank of a sewage treatment plant, inoculate it into a single-chamber microbial battery from the strain inoculation port, and ...

Embodiment 2

[0030] A sludge treatment method for alkaline treatment coupled with a single-chamber microbial electrochemical system, the specific steps are as follows:

[0031] (1) Alkali treatment of sludge: Collect samples of excess sludge from sewage treatment plants, import 1000 mg of excess sludge from the sludge inlet of the alkali treatment tank into the alkali treatment tank, measure the pH value with a pH meter, and determine the pH of the original excess sludge The value is about 6.5. While the agitator is constantly stirring, add NaOH (1.5mol / L) through the acid-base adjustment port of the alkali treatment tank to adjust the pH value of the remaining sludge to 10, and keep it at room temperature for 15 hours;

[0032](2) Construction of a single-chamber microbial battery: Take 90 mg of raw sludge (containing mature strains) in the secondary sedimentation tank of a sewage treatment plant, inoculate it into a single-chamber microbial battery from the strain inoculation port, and mi...

Embodiment 3

[0036] A sludge treatment method for alkaline treatment coupled with a single-chamber microbial electrochemical system, the specific steps are as follows:

[0037] (1) Alkali treatment of sludge: Collect samples of excess sludge from sewage treatment plants, import 1000 mg of excess sludge from the sludge inlet of the alkali treatment tank into the alkali treatment tank, measure the pH value with a pH meter, and determine the pH of the original excess sludge The value is about 6.5. While the agitator is stirring continuously, add NaOH (1mol / L) through the acid-base adjustment port of the alkali treatment pool to adjust the pH value of the remaining sludge to 7, and keep it at room temperature for 16 hours;

[0038] (2) Construction of a single-chamber microbial battery: Take 110 mg of raw sludge (containing mature strains) in the secondary sedimentation tank of a sewage treatment plant, inoculate it into a single-chamber microbial battery from the strain inoculation port, and m...

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Abstract

The invention discloses a residual sludge treatment method of an alkali treatment coupled single-chamber microbial electrochemical system. The method comprises the steps of alkali treatment on sludge,construction of a single-chamber microbial battery and construction of a coupled system. According to the method, alkali pretreatment is utilized, the physical structure of the excess sludge is changed, the concentration of organic matters in the solution is increased, further degradation of microorganisms is facilitated, and the degradation efficiency of the excess sludge is improved through coupling of the alkali pretreatment and a microbial electrochemical system.

Description

technical field [0001] The invention relates to a sludge treatment method coupled with a single-chamber microbial electrochemical system for alkali treatment, and belongs to the field of sludge treatment. Background technique [0002] Excess sludge is a by-product of the sewage treatment process in sewage treatment plants. Sewage treatment plants continuously produce a large amount of excess sludge every day, and the treatment cost of this part of sludge accounts for 25-60% of the operating cost of the sewage treatment plant. In recent years, researchers have begun to focus on the use of microbial electrochemical systems to treat excess sludge. Microbial electrochemical technology is a promising solid waste and sewage treatment technology that can generate renewable energy while treating pollutants. This technology has The higher removal efficiency of volatile suspended matter shows a better application prospect in the field of sludge treatment. In addition, the microbial ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02C02F101/30
CPCC02F11/00C02F11/02C02F11/006C02F2101/30C02F2303/06
Inventor 潘波吴美璇张鹏
Owner KUNMING UNIV OF SCI & TECH
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