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Urban sludge, excrement and kitchen garbage combined treatment process

A technology for municipal sludge and kitchen waste, applied in the combined treatment process of excrement and kitchen waste, in the field of urban sludge, can solve the problems of high investment in pollutant treatment and high operating costs, save engineering investment, high degree of automation, Emission reduction effect

Active Publication Date: 2011-08-31
DALIAN MUNICIPAL DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the characteristics of high organic content in urban sludge, feces and kitchen waste, the present invention innovatively adopts a combined anaerobic treatment process, simplifies the treatment process, and solves the problems of high investment and high operating cost in the treatment of the above pollutants, and provides A new process of comprehensive combined treatment, that is, combined treatment process of municipal sludge, feces and kitchen waste

Method used

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  • Urban sludge, excrement and kitchen garbage combined treatment process
  • Urban sludge, excrement and kitchen garbage combined treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: 600 tons / day of urban sludge in Dalian, 100 tons / day of feces, and 200 tons / day of kitchen waste are combined for treatment, and the pollutant component indicators are:

[0025] Table 1 The main component list of municipal sludge (%)

[0026] serial number

Test items

content

Remark

1

pH value

5.79

2

moisture content

80％

3

organic matter

61.9％-66.7％

4

total nitrogen

4％

dry sludge content

5

Total Phosphorus

2％

dry sludge content

[0027] Table 2 The main component table of feces (%)

[0028] serial number

Test items

content

Remark

1

Solid content

3％～5％

2

Organic content

60％

3

fecal coliform count

≥240,000 pieces / 100ml

[0029] Table 3 The main components of food waste (%)

[0030] serial number

Test items

content

Remark...

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Abstract

The invention relates to an urban sludge, excrement and kitchen garbage combined treatment process as a novel process, in particular to an urban sludge, excrement and kitchen garbage combined treatment process under the demands of lower investment from government, less occupying area and lower running cost. In the combined treatment process, a pretreatment unit, a combined tempering unit, an intermediate-temperature anaerobic digestion unit, a digestive juice dewatering unit, a methane purifying unit and a biogas treating unit are included. The invention provides a novel treatment process in order to solve the problems of pollution from urban sludge, excrement and kitchen garbage.

Description

technical field [0001] The invention relates to a combined treatment process for urban sludge, feces and kitchen waste, especially for municipal sludge, excrement and kitchen waste under the requirements of low investment, less floor space and less operating costs when government funds are tight Merge process. Background technique [0002] The pollution of urban sludge, urban excrement and kitchen waste has always been a headache in various cities in China. Municipal sludge has the characteristics of high organic matter content, strong odor, and difficult to stack. Now there are mainly drying method, semi-drying method, composting, anaerobic digestion and other treatment methods. Urban feces have the characteristics of high water content, high organic matter content, and many pathogenic bacteria. Currently, there are mainly methods such as joint treatment with urban sewage plants, and separate anaerobic digestion treatment. Food waste has the characteristics of high water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F3/28C12P5/02
CPCY02E50/343Y02E50/30
Inventor 陈海
Owner DALIAN MUNICIPAL DESIGN & RES INST
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