Method for producing hydrogen gas through reinforcing anaerobic fermentation of surplus sludge

An anaerobic fermentation and excess sludge technology, applied in fermentation, biological sludge treatment, chemical instruments and methods, etc., can solve problems such as increasing the release of organic matter, improve the rate of hydrogen production, reduce environmental pollution, and alleviate energy shortages Effect

Inactive Publication Date: 2019-04-26
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it is also used in medicine, chemical industry and other fields. In particular, potassium permanganate, as an oxidant, can effectively promote the breakdown of sludge cells and increase the release of organic matter. In addition, potassium permanganate can significantly inhibit hydrogen-consuming bacteria. , so as to greatly improve the hydrogen production of sludge anaerobic fermentation. However, so far, the use of potassium permanganate to improve the hydrogen production of sludge anaerobic fermentation has not been reported.

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  • Method for producing hydrogen gas through reinforcing anaerobic fermentation of surplus sludge
  • Method for producing hydrogen gas through reinforcing anaerobic fermentation of surplus sludge

Examples

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Effect test

Embodiment example 1

[0022] (1) In a plexiglass container with a working volume of 4L, the sludge produced by the municipal sewage treatment plant is placed at 4°C to naturally settle for 1d, and the supernatant is removed to obtain the fermentation raw material.

[0023] (2) Add 500 mL of the sludge obtained in (1) into the reactor, and add 0.05 g / g TSS potassium permanganate, and stir evenly. Fill the reactor with nitrogen for 5 minutes to remove oxygen, seal the reactor and put it into a shaker for anaerobic fermentation, where the shaker fermentation temperature is 35±1℃, the shaking speed is 120rpm / min, and the fermentation time (ie, pollution) The residence time of the mud in the reactor) is 6 days, and the hydrogen production is 3.34 mL / g VSS.

Embodiment example 2

[0025] (1) In a plexiglass container with a working volume of 4L, the sludge produced by the municipal sewage treatment plant is placed at 4°C to naturally settle for 1d, and the supernatant is removed to obtain the fermentation raw material.

[0026] (2) Add 500 mL of the sludge obtained in (1) into the reactor, and add 0.05 g / g TSS potassium permanganate, and stir evenly. Fill the reactor with nitrogen for 5 minutes to remove oxygen, seal the reactor and put it into a shaker for anaerobic fermentation, where the shaker fermentation temperature is 35±1℃, the shaking speed is 120rpm / min, and the fermentation time (ie, pollution) The residence time of the mud in the reactor is 10 days, and the hydrogen production is 4.35 mL / g VSS.

Embodiment example 3

[0028] (1) In a plexiglass container with a working volume of 4L, the sludge produced by the municipal sewage treatment plant is placed at 4°C to naturally settle for 1d, and the supernatant is removed to obtain the fermentation raw material.

[0029] (2) Put 500mL of the sludge obtained in (1) into the reactor, and add 0.1g / g TSS potassium permanganate, stir evenly. Fill the reactor with nitrogen for 5 minutes to remove oxygen, seal the reactor and put it into a shaker for anaerobic fermentation, where the shaker fermentation temperature is 35±1℃, the shaking speed is 120rpm / min, and the fermentation time (ie, pollution) The residence time of the mud in the reactor) is 6 days, and the hydrogen production is 4.06 mL / g VSS.

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Abstract

The invention relates to a method for producing hydrogen gas through improving anaerobic fermentation of sludge by adding potassium permanganate (a typical oxidant). The specific method comprises thesteps: (1) subjecting primary sludge and surplus sludge generated from an urban sewage treatment plant to free settling treatment, removing supernatant, and carrying out concentrating, so as to obtainfermented feedstocks; (2) adding potassium permanganate into the obtained fermented feedstocks, and carrying out treatment under anaerobic conditions, thereby producing hydrogen gas. After the sludgeis treated with potassium permanganate, lysing of the sludge is promoted, organics such as proteins and saccharides can be extensively digested, and the activity of hydrogen-addicted methane producing microbes is seriously limited, so that the volume of hydrogen gas generated by the sludge can be greatly promoted. Through simple, cheap and effective operations, the decrement of the sludge is achieved, the resource-converting utilization of the sludge is further promoted, and the method has an important significance in treatment and disposal of the sludge.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection and sludge treatment and resource utilization, and specifically relates to a method for increasing hydrogen production by anaerobic fermentation of sludge by adding potassium permanganate (a typical oxidant). technical background [0002] At present, the number of urban sewage treatment plants in my country is growing rapidly, accompanied by the production of a large amount of primary sludge and excess sludge. Since the sewage discharged by urban residents contains various pollutants, it enters the sewage treatment plant through the municipal pipe network. These pollutants cannot be degraded by the microorganisms in the sludge and are attached to the concentrated sludge in large quantities. . If the sludge treatment and disposal are improper, the sludge will come into contact with groundwater, surface water, etc. The remaining sludge flocs contain a large number of viruses, heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00C02F11/04
CPCC02F11/04C02F2303/06C12P3/00
Inventor 王冬波符气梓杨静楠
Owner HUNAN UNIV
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