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Synergistic method for anaerobic digestion of municipal sludge, and application thereof

A municipal sludge and anaerobic digestion technology, which is applied in biological sludge treatment and other directions, can solve the problems of high energy consumption, high investment and operation costs, and complicated process routes of pretreatment methods, so as to achieve efficient and stable treatment and reduce energy consumption. The effect of simple consumption and process route

Inactive Publication Date: 2020-02-25
TIANJIN CARING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above pretreatment methods consume a lot of energy, require high equipment, complex process routes, and high investment and operating costs.

Method used

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  • Synergistic method for anaerobic digestion of municipal sludge, and application thereof
  • Synergistic method for anaerobic digestion of municipal sludge, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a method for synergizing the anaerobic digestion of municipal sludge, comprising the following steps:

[0062] A. Catering waste reception, raw food waste is measured and sent to the designated place for self-unloading into the mobile storage tank, and the mobile storage tank is lifted to a certain height by a rail-type elevator, and then the material is unloaded into the receiving hopper of the sorting machine.

[0063] B. Municipal sludge reception: The remaining sludge from the municipal sewage treatment plant is dehydrated to a moisture content of about 80%, and then sent to the temporary sludge storage pool by a transport vehicle.

[0064] C. Food waste sorting: The food waste in the receiving hopper enters the sorting system, and the large materials are selectively separated and sent to the press for dehydration, and then they are transported outside for incineration.

[0065] D. Crushing and pulping of catering waste: the catering waste s...

Embodiment 2

[0071] This example provides a synergistic method for anaerobic digestion of municipal sludge, which ensures that the absolute dry amount put into the fermentation system is the same every day. The only difference from Example 1 is that the absolute dry ratio of catering waste slurry and municipal sludge is 1:7 for mixing.

Embodiment 3

[0073] This example provides a synergistic method for anaerobic digestion of municipal sludge, which ensures that the absolute dry amount put into the fermentation system is the same every day. The difference from Example 1 is that the absolute dry ratio of catering waste slurry and municipal sludge is 1 :6 for mixing.

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Abstract

The invention provides a synergistic method for anaerobic digestion of municipal sludge, and an application thereof, and relates to the technical field of sludge treatment. Food wastes and municipal sludge are mixed according to an absolute dry weight ratio of 1:8 to 1:2, and the obtained mixture undergoes anaerobic digestion at 30-40 DEG C, wherein the water content of the mixture of the municipal sludge and the food wastes is 88-92 wt%. The synergistic method effectively improves the organic matter degradation rate of municipal sludge anaerobic digestion, and has the advantages of simple process, low energy consumption, and improvement of the biogas yield.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a synergistic method and application of municipal sludge anaerobic digestion. Background technique [0002] In recent years, with the continuous improvement of the level of urbanization in our country, the construction and popularization of sewage treatment have been developed at a high speed, and at the same time, the sludge production has also increased dramatically. As of the end of 2018, the national sewage treatment capacity reached 190 million cubic meters per day, with an annual output of more than 50 million tons of sludge with a moisture content of 80% (excluding more than 40 million tons of industrial sludge). Sludge is the carrier of most pollutants in sewage. If it cannot be properly treated and disposed of, the effect of energy saving and emission reduction will be greatly reduced. [0003] Anaerobic digestion refers to the decomposition of biodegradable or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04
CPCC02F11/04
Inventor 张波涛刘圣王晓阳张振旺陈曦侯汉宗潘越齐
Owner TIANJIN CARING TECH DEV
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