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Method for promoting hydrogen production by anaerobic fermentation of remaining activated sludge

A technology for excess sludge and sludge is applied in the field of anaerobic fermentation of sludge pretreated with potassium hydrogen persulfate compound salt to produce hydrogen, which can solve the problems of serious secondary pollution, complex process control, large energy consumption, etc. The effect of processing cost, improving hydrogen production rate and saving resources

Inactive Publication Date: 2018-10-09
HUNAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods all have problems such as large energy consumption, serious secondary pollution, and complicated process control, which inhibit the anaerobic fermentation of sludge. Research Hotspots

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  • Method for promoting hydrogen production by anaerobic fermentation of remaining activated sludge
  • Method for promoting hydrogen production by anaerobic fermentation of remaining activated sludge
  • Method for promoting hydrogen production by anaerobic fermentation of remaining activated sludge

Examples

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Embodiment 1

[0027] (1) In a plexiglass reactor with a working volume of 5.0L, the remaining sludge discharged from the sewage treatment plant was naturally precipitated at 4°C for 24 hours, and the supernatant was discarded and concentrated to obtain the required sludge sample. Sludge samples are used as substrates for anaerobic fermentation to produce hydrogen;

[0028] (2) Get 500 mL of the fermentation substrate obtained in step (1) in the anaerobic reactor, add 0.06 g / g VSS potassium monopersulfate compound salt (PMS), and stir rapidly at 300 rpm for 5 min earlier with a magnetic stirrer, Stir again at 150rpm for 100min to fully mix the agent with the sludge. Inoculate 50ml of hydrogen-producing seed slime into the anaerobic reactor, fill the anaerobic reactor with nitrogen for 1.5min to remove the oxygen in it, seal the anaerobic reactor and put it into a shaker for anaerobic fermentation to produce hydrogen. Among them, the shaker fermentation temperature is 35±1°C, the oscillation...

Embodiment 2

[0030] (1) In a plexiglass reactor with a working volume of 5.0L, the remaining sludge discharged from the sewage treatment plant was naturally precipitated at 4°C for 24 hours, and the supernatant was discarded and concentrated to obtain the required sludge sample. Sludge samples are used as substrates for anaerobic fermentation to produce hydrogen;

[0031] (2) Get 500mL of the fermentation substrate obtained in step (1) in the anaerobic reactor, add 0.12g / g VSS potassium peroxymonosulfate compound salt (PMS), and stir rapidly at 300rpm earlier with a magnetic stirrer for 5min, Stir again at 150rpm for 100min to fully mix the agent with the sludge. Inoculate 50ml of hydrogen-producing seed slime into the anaerobic reactor, fill the anaerobic reactor with nitrogen for 1.5min to remove the oxygen in it, seal the anaerobic reactor and put it into a shaker for anaerobic fermentation to produce hydrogen. Among them, the shaker fermentation temperature is 35±1°C, the oscillation ...

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Abstract

The invention relates to a method for promoting hydrogen production by anaerobic fermentation of remaining sludge through potassium peroxymonosulfate (PMS). The methods comprises the following specific steps: (1) with remaining activated sludge produced by a secondary sedimentation tank of a municipal sewage treatment plant as a fermentation raw material, removing supernatant by natural sedimentation and carrying out concentration treatment to obtain a sludge sample; and (2) mixing and preprocessing the sludge sample and PMS, then inoculating a certain volume of hydrogen-producing seed sludge,and fermenting in anaerobic environment to produce hydrogen. After the remaining sludge is pretreated by PMS, the dissolution of organic matter in the sludge is accelerated. The organic matter dissolved after the sludge is cracked provides a rich matrix for hydrogen production by fermentation, thereby improving the hydrogen production, shortening the time of sludge anaerobic fermentation and reutilizing the remaining sludge. The method provided by the invention is simple to operate, has mild reaction conditions, and has good application prospects in environmental control and comprehensive utilization of waste resources.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and solid waste treatment, and in particular relates to a method for producing hydrogen by anaerobic fermentation of sludge pretreated with potassium monopersulfate compound salt (PMS). technical background [0002] With the increase in construction intensity and scale of urban sewage treatment plants, a large amount of excess sludge is produced. However, due to the high cost and technical challenges of sludge treatment, only 35% of sludge can be reasonably and safely disposed of in sludge treatment. Sludge contains a large amount of toxic substances such as odorous substances, heavy metals, pathogens, etc. If it is not handled properly, it will cause serious pollution to the environment. It is estimated that by 2020, my country's sludge production will exceed 60 million tons. Therefore, how to properly treat and dispose of sludge is an urgent problem to be solved. [0003] Ana...

Claims

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Application Information

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IPC IPC(8): C12P3/00
CPCC12P3/00
Inventor 杨静楠符气梓刘强
Owner HUNAN UNIV
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