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Technology for producing biogas from tap water plant sludge

A water plant and sludge technology, which is applied in water/sludge/sewage treatment, water pollutants, biological sludge treatment, etc., can solve problems such as affecting the efficiency of the reactor, and achieve low treatment costs, increase in polysaccharide concentration, and improve The effect of efficiency

Inactive Publication Date: 2017-09-15
HEFEI ZEJUN ELECTRICAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional anaerobic digestion process, acid-producing bacteria and methanogens complete the whole process of anaerobic digestion in a single-phase reactor. Due to the large differences in the characteristics of the two strains and the different requirements for environmental conditions, it is impossible to make the two strains Both are in the best physiological state, which affects the efficiency of the reactor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of utilization waterworks sludge production biogas process that present embodiment provides, comprises the following steps:

[0045](1) Adjust the sludge from the waterworks to 65.0g TS / L, then add ethylenediaminetetraacetic acid solution, mix well, then add neutral protease, mix well, adjust the reaction temperature to 50.0°C, pH to 7.0, stir React for 1 hour to obtain acidified sludge hydrolyzate 1;

[0046] (2) Add the attapulgite into the acidified sludge hydrolyzate 1, control the reaction temperature, adjust the reaction pH to 10.0, and carry out the reaction for 20 minutes to obtain the acidified sludge hydrolyzate 2, wherein one liter of acidified sludge hydrolyzate The rod dosage is 25g;

[0047] (3) Add 2.0L of inoculated sludge into the anaerobic composite bed reactor, and inject diluted acidified sludge hydrolyzate II, control the temperature in the reactor to 25°C, and start internal circulation. After two days of circulation, use Top reflux, when ...

Embodiment 2

[0057] A kind of utilization waterworks sludge production biogas process that present embodiment provides, comprises the following steps:

[0058] (1) Adjust the sludge from the waterworks to 50.0g TS / L, then add ethylenediaminetetraacetic acid solution, mix well, then add neutral protease, mix well, adjust the reaction temperature to 55.0°C, pH to 6.5, stir React for 2 hours to obtain acidified sludge hydrolyzate 1;

[0059] (2) Add the attapulgite to the acidified sludge hydrolyzate 1, control the reaction temperature, adjust the reaction pH to 6.0, and carry out the reaction for 30 minutes to obtain the acidified sludge hydrolyzate 2, wherein, for each liter of acidified sludge hydrolyzate 1 attapulgite The rod dosage is 5.0g;

[0060] (3) Add 1.5L of inoculated sludge into the anaerobic composite bed reactor, and inject diluted acidified sludge hydrolyzate II, control the temperature in the reactor to 26°C, and start internal circulation. After two days of circulation, us...

Embodiment 3

[0070] A kind of utilization waterworks sludge production biogas process that present embodiment provides, comprises the following steps:

[0071] (1) Adjust the sludge from the waterworks to 55.0g TS / L, then add ethylenediaminetetraacetic acid solution, mix well, then add neutral protease, mix well, adjust the reaction temperature to 53.0°C, pH to 6.8, stir React for 2 hours to obtain acidified sludge hydrolyzate 1;

[0072] (2) Add the attapulgite into the acidified sludge hydrolyzate 1, after controlling the reaction temperature, adjust the reaction pH to 8.0, and carry out the reaction for 25 minutes to obtain the acidified sludge hydrolyzate 2, wherein, one liter of acidified sludge hydrolyzate The rod dosage is 12g;

[0073] (3) Add 1.8L of inoculated sludge into the anaerobic composite bed reactor, and inject diluted acidified sludge hydrolyzate II, control the temperature in the reactor to 25°C, and start internal circulation. After two days of circulation, use Top r...

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PUM

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Abstract

The invention belongs to the technical field of biogas production, and provides a technology for producing biogas from tap water plant sludge. The technology comprises the following steps: preparing a first acidified sludge hydrolysate, adding attapulgite to the first acidified sludge hydrolysate, carrying out a reaction at a controlled reaction temperature under a regulated reaction pH value of 6.0-10.0 for 20-30 min to obtain a second acidified sludge hydrolysate, inoculating an anaerobic bed reactor with 1.5-2.0 L of sludge, and injecting the diluted second acidified sludge hydrolysate in order to produce the biogas. The technology realizes the recycling of the water plant sludge and improves the biogas production efficiency.

Description

technical field [0001] The invention belongs to the technical field of biogas production, and in particular relates to a biogas production process using sludge from a waterworks. Background technique [0002] In my country, most of the waterworks discharge muddy water directly to nearby water bodies, and a large amount of muddy water is discharged into rivers, which is not only a pollution to the river, but also a huge waste of water resources. Under the environment of sustainable development, waterworks, as one of the victims of water source pollution, should not discharge sludge water directly into rivers without treatment. The importance of waterworks sludge treatment and sludge disposal is increasingly recognized by people. attention. [0003] Utilizing waste as resources is an important measure to build a harmonious society using the scientific concept of development. After mechanical dehydration, sludge from waterworks is piled up on land or landfilled in a sanitary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F101/16
CPCC02F11/04C02F2101/105C02F2101/16Y02E50/30
Inventor 徐仙峰
Owner HEFEI ZEJUN ELECTRICAL EQUIP CO LTD
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