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A method for pretreatment to improve the mixed hydrogen production of kitchen waste and cyanobacteria

A technology for kitchen waste and pretreatment, which is used in biosynthesis, fermentation and other directions to improve hydrogen production efficiency, promote hydrogen production by anaerobic fermentation, and be easy to operate.

Active Publication Date: 2022-07-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still few reports at home and abroad on the use of high-pressure homogenization to crush Taihu Lake cyanobacteria to improve co-fermentation hydrogen production

Method used

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  • A method for pretreatment to improve the mixed hydrogen production of kitchen waste and cyanobacteria
  • A method for pretreatment to improve the mixed hydrogen production of kitchen waste and cyanobacteria
  • A method for pretreatment to improve the mixed hydrogen production of kitchen waste and cyanobacteria

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The schematic diagram of the experimental device is as follows figure 1 shown. Specific steps are as follows:

[0043] (1) Heat treatment of anaerobic granular sludge: the heat treatment temperature of anaerobic granular sludge is 120°C, and the treatment time is 10 minutes;

[0044] (2) Pretreatment of cyanobacteria by high-pressure homogenization: first filter the cyanobacteria with a 100-mesh sieve to remove large particles or viscous substances, and then perform high-pressure homogenization and crushing, the pressure is 60MPa, and the number of homogenization is 1 time. The microscopic morphology, average particle size, SCOD dissolution effect and cracking energy efficiency of cyanobacteria after high pressure homogenization are shown in Figures 2 to 5 .

[0045] (3) mixing the cyanobacteria after high pressure homogenization and kitchen waste in step (2) as fermentation substrate: the mixing ratio is TS 1:4;

[0046] (4) Mixing the heat-treated anaerobic granu...

Embodiment 2

[0048] Example 2: Effects of different homogenization pressures on the hydrogen production performance of mixed fermentation

[0049] Anaerobic fermentation was carried out by the method of Example 1, the only difference being that the high-pressure homogenization pressures were 20, 40, 80 and 100 MPa respectively, and other conditions were the same as those of Example 1. The microscopic morphology, average particle size, SCOD dissolution effect and cracking energy efficiency of cyanobacteria after high pressure homogenization are shown in Figures 2 to 5 ; Changes in cumulative hydrogen production, organic matter degradation rate and liquid end product concentration after mixed fermentation are shown in Figures 6 to 9 .

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Abstract

The invention discloses a method for pretreatment to improve the mixed hydrogen production of kitchen waste and cyanobacteria, and belongs to the technical field of treatment and utilization of organic solid waste. In the invention, the anaerobic granular sludge is heat-treated, mixed with kitchen waste and cyanobacteria pretreated by high-pressure homogenization in an appropriate ratio, and the solid content rate of the reaction system is controlled; Heat treatment can effectively kill methanogens, while hydrogen-producing bacteria that can produce spores will survive. The kitchen waste and cyanobacteria pretreated by high pressure homogenization are added to the anaerobic mixed fermentation hydrogen production system. Microorganisms can degrade some refractory substances in cells and hydrolyze some extracellular polymers, thereby promoting anaerobic fermentation to produce hydrogen. At the same time, the hydrogen production efficiency was also improved, and the cumulative hydrogen production was 36.67 mL·gVS ‑1 , realizing the efficient recovery of hydrogen energy.

Description

technical field [0001] The invention relates to a method for pretreatment to improve the mixed hydrogen production of kitchen waste and cyanobacteria, and belongs to the technical field of treatment and utilization of solid organic waste. Background technique [0002] In recent years, the phenomenon of eutrophication in lakes has become more serious, and the large-scale outbreak of cyanobacteria has become one of the serious environmental problems. It is the most effective, safe and convenient way to salvage a large number of blue-green algae. However, how to realize the subsequent resource utilization of cyanobacteria has become an important problem to be solved. The anaerobic fermentation technology can not only realize the treatment of cyanobacteria, but also recover hydrogen energy. However, cyanobacterial fermentation alone is less efficient, and the presence of unbalanced nutrients and cell walls can adversely affect cyanobacterial degradation. From the analysis of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P3/00
CPCC12P3/00Y02P20/59
Inventor 赵明星李子阳徐锦汤晴阮文权
Owner JIANGNAN UNIV
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