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Reinforced method for production of methane from residual sludge

A technology for excess sludge and methane production, which is applied in chemical instruments and methods, sludge treatment, biological sludge treatment, etc., to achieve the effect of shortening anaerobic digestion time and good application prospects

Inactive Publication Date: 2017-09-01
江苏盐城环保产业工程研发服务中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the sludge anaerobic digestion system, the research on enhancing the electron transport efficiency by adding inorganic carbon materials to improve the effect of methane production has not been reported.

Method used

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  • Reinforced method for production of methane from residual sludge

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Effect test

Embodiment 1

[0025] The excess sludge produced by the sewage treatment plant is added to an anaerobic reactor with a working volume of 10L as the substrate for anaerobic digestion. The anaerobic digestion temperature is 35°C, and activated carbon with a particle size of 0.4mm is added to the reactor. , the mass ratio of its dosage to the dry weight of the sludge is 0.2:1, and the sludge organic matter is converted into methane through the joint action of anaerobic microorganisms in the sludge and activated carbon. The residence time of the sludge in the reactor is 13 days.

Embodiment 2

[0027] The excess sludge produced by the sewage treatment plant is added to an anaerobic reactor with a working volume of 10L as the substrate for anaerobic digestion. The anaerobic digestion temperature is 35°C, and activated carbon with a particle size of 0.4mm is added to the reactor. , the mass ratio of its dosage to the dry weight of the sludge is 0.1:1, and the sludge organic matter is converted into methane through the joint action of anaerobic microorganisms in the sludge and activated carbon. The residence time of the sludge in the reactor is 13 days.

Embodiment 3

[0029] The excess sludge produced by the sewage treatment plant is added to an anaerobic reactor with a working volume of 10L as the substrate for anaerobic digestion. The anaerobic digestion temperature is 35°C, and activated carbon with a particle size of 0.4mm is added to the reactor. The mass ratio of its dosage to the dry weight of the sludge is 0.3:1, and the organic matter of the sludge is converted into methane through the joint action of anaerobic microorganisms in the sludge and activated carbon. The residence time of the sludge in the reactor is 13 days.

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Abstract

Belonging to the technical field of environmental protection and resource recovery, the invention in particular relates to a reinforced method for production of methane from residual sludge. Residual sludge of a sewage treatment plant is adopted as the raw material, activated carbon is added into an anaerobic reactor to reach a combined action with anaerobic microorganisms in the sludge, and rich organic matters in the sludge are effectively converted into methane gas. Compared with the prior art, the method provided by the invention has the advantages of simple operation, low investment and treatment cost, and can effectively reinforce anaerobic digestion of residual sludge for production of methane, and at the same time reaches the effect of sludge reduction.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and resource utilization, and relates to a method for enhancing methane production from excess sludge. Background technique [0002] In recent years, my country's urbanization process has gradually accelerated, and the sewage treatment rate has also increased significantly. Correspondingly, the excess sludge produced in the process of sewage biological treatment has also increased significantly. It is estimated that by the end of 2015, my country's sludge output will reach 34 million tons (80% moisture content). If the sludge is not treated properly, it will cause serious secondary environmental pollution after discharge. Under the influence of national energy conservation and emission reduction policies, anaerobic digestion has gradually become the preferred sludge treatment technology. [0003] Anaerobic digestion of sludge refers to the process of degrading organic matter by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04
CPCC02F11/04C02F2303/06Y02E50/30Y02W10/20
Inventor 冯雷雨严媛媛戴星星马雪莲吴文丽王青青
Owner 江苏盐城环保产业工程研发服务中心
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