Sludge treatment method based on carbon dioxide emission reduction

A carbon dioxide and sludge treatment technology, applied in the fields of sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve problems such as unfavorable carbon emission reduction, and achieve the effect of reducing pollution and reducing carbon dioxide emissions

Inactive Publication Date: 2019-12-20
SHANGHAI MUNICIPAL WATER RESOURCES DEV & UTILIZATION NAT ENG CENT
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Problems solved by technology

Although the sanitary landfill process has the advantages of low treatment cost and mature technology, from the perspective of environmental impact, in the process of

Method used

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  • Sludge treatment method based on carbon dioxide emission reduction
  • Sludge treatment method based on carbon dioxide emission reduction
  • Sludge treatment method based on carbon dioxide emission reduction

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Embodiment

[0039] Assuming that the water content of the feed sludge of a sewage plant using anaerobic digestion process is 90%, W refers to the total weight of sludge treated daily, assuming 105t / d here, DOC is the content of degradable organic carbon, which is taken as 50% of the dry sludge ,DOC f Refers to the actual proportion of degradable organic carbon, the recommended value given by IPCC is 50%, and MCF is the correction factor of methane, considering that it is anaerobic digestion of sludge, so take 80%, F is the content of methane in landfill gas The volume fraction accounted for is 50%. 44 / 12 for CO 2 / C molecular weight ratio.

[0040] If the sewage plant does not adopt the collaborative anaerobic digestion process, but directly uses the sanitary landfill process to treat and dispose of the sludge, then the carbon dioxide emission as a benchmark directly calculated according to the IPCC default value model is:

[0041] E. CO2 =W×0.153×0.5×(1-0.8×0.5)×(44 / 12)=0.168W

[00...

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Abstract

The invention discloses a sludge treatment method based on carbon dioxide emission reduction. The method comprises the following steps: S1, selecting a certain amount of sludge to be treated, and calculating the carbon dioxide generation amount under the sludge sanitary landfill condition by taking sludge sanitary landfill as a comparison reference; step S2, based on different sludge treatment anddisposal processes, on the premise of mass balance conservation, based on each accounting boundary condition under the condition of mass conservation, calculating carbon dioxide emissions generated by all direct emissions and indirect emissions in each sludge treatment and disposal process, and carbon emission reduction caused by carbon sink generated by final energy reuse; S3, according to the carbon dioxide generation amount btained in the step S1 and the carbon dioxide emission amount obtained in the step S2, obtaining carbon dioxide emission reduction amounts of different sludge treatmentand disposal processes with requirements on emission reduction amount calculation; and S4, according to the obtained carbon dioxide emission reduction amount of each process, selecting a corresponding sludge treatment process to carry out sludge treatment.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge treatment method based on carbon dioxide emission reduction. Background technique [0002] In recent years, as more and more attention has been paid to environmental issues, sewage treatment capacity has also been continuously improved. By the end of 2018, my country had built 4,205 sewage treatment plants, and the amount of urban sludge produced exceeded 46 million. In the process of sludge treatment and disposal Carbon emissions are one of the important sources of greenhouse gases. How to reduce carbon dioxide emissions in the process of sludge treatment and disposal is of great significance to reduce air pollution. [0003] Like many other industries, the process of sewage sludge treatment and disposal consumes energy and produces a large amount of carbon emissions. According to the statistics of developed countries, the carbon emission of the sewage treatme...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/04C10L3/08C02F101/30
CPCC02F11/00C02F11/04C02F2101/30C02F2209/21C10L3/08Y02E50/30
Inventor 郭恰马艳韩小蒙宋姗姗
Owner SHANGHAI MUNICIPAL WATER RESOURCES DEV & UTILIZATION NAT ENG CENT
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