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Composite type sludge reduction anaerobic digester

An anaerobic digestion tank and sludge reduction technology, applied in anaerobic digestion treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of affecting the living environment of methanogenic bacteria and affecting sludge anaerobic Digestion effect and other issues, to achieve the effect of high sludge reduction, simple structure, and low capital investment

Pending Publication Date: 2017-04-26
宜兴市建邦环境投资有限责任公司
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AI Technical Summary

Problems solved by technology

If the reaction speed of hydrolytic acidification and acetic acidification process exceeds the speed of methanation process, the pH will decrease, which will affect the living environment of methanogenic bacteria, and then affect the effect of sludge anaerobic digestion

Method used

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  • Composite type sludge reduction anaerobic digester
  • Composite type sludge reduction anaerobic digester

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Experimental program
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Effect test

Embodiment Construction

[0033] Sewage enters the hydrolysis zone and anaerobic zone in the compound anaerobic tank through the water inlet distribution pipe according to a certain ratio;

[0034] The hydrolysis zone is divided into a hydrolysis zone A and a hydrolysis zone B.

[0035] The sludge return pipe in the hydrolysis zone and the excess sludge return pipe share a pipe, and the pipe is connected to the middle and lower part of the hydrolysis zone A.

[0036] The water distribution baffle is circular, and under the action of the reaction force blocked by the sludge water distribution baffle, the sludge circulates inside the hydrolysis zone A to fully mix the sewage.

[0037] The hydrolysis zone A communicates with the bottom of the hydrolysis zone B.

[0038] There is no turbulent flow interference in the hydrolysis zone B, and the flow velocity of the suspended sludge is less than 0.25m / s. The mud and water in this zone are naturally stratified. The bottom of the hydrolysis zone is equipped w...

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Abstract

The invention discloses a composite type sludge reduction anaerobic digester. The composite type sludge reduction anaerobic digester comprises a hydrolysis zone and an anaerobic zone. The hydrolysis zone comprises a hydrolysis zone body A and a hydrolysis zone body B. The anaerobic zone comprises an anaerobic zone body A and an anaerobic zone body B. An inflow water distribution pipe is arranged at the water inlet end of the hydrolysis zone and the water inlet end of the anaerobic zone. The hydrolysis zone and the anaerobic zone are each provided with a sludge return pipeline. The hydrolysis zone sludge return pipeline and the remaining sludge pipelines of a biochemical system are used synchronously. By adjusting the remaining sludge return capacity and the inflow water distribution amount, all the functional zones are distinguished seriously. The hydrolysis function and the anaerobic digestion function are performed to the maximum extent by controlling the survival environment which microorganisms in the two zones adapt to. The purpose of sludge reduction is achieved by hydrolyzing and digesting microorganism endogenous respiration products and other organic matter returned by remaining sludge. The composite type sludge reduction anaerobic digester has the advantages of being wide in applicability, high in efficiency, compact in structure, capable of saving energy and the like.

Description

technical field [0001] The invention belongs to the field of environmental protection, and mainly relates to a composite anaerobic digester capable of reducing the output of surplus sludge in a sewage treatment plant. [0002] technical background [0003] At present, the activated sludge method is mainly used for wastewater treatment. The activated sludge process has a large sludge output and high treatment and disposal costs. Sludge has become one of the urgent problems to be solved by domestic and foreign sewage treatment plants. Since 2003, my country's excess sludge production has exceeded 10 million tons (National Bureau of Statistics, etc., 2010); with the large-scale construction of urban sewage treatment plants during the "Eleventh Five-Year Plan" period, my country's sludge production in 2011 was about 21.88 million tons. In 2015, my country's sludge output exceeded 30 million tons. If the excess sludge is not effectively treated and disposed of, it will produce sec...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F11/04
CPCC02F3/286C02F3/2866C02F11/04
Inventor 张超徐冰心陈亚松
Owner 宜兴市建邦环境投资有限责任公司
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