Method for relieving acidic suppression of methanogenic phase during anaerobic digestion of organic wastewater

An anaerobic digestion and organic wastewater technology, applied in anaerobic digestion treatment, waste fuel, etc., can solve the problems of slow growth of methanogens, loss of methanogens, poor settling properties, etc., and achieve reduction of anaerobic active pollution Effects of mud loss, slowing acidic inhibition of methanogenic phase, and increasing concentration

Inactive Publication Date: 2014-03-12
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In addition, the methanogenic bacteria in the anaerobic activated sludge grow slowly. Generally, the settleability of the anaerobic digested sludge is not so good, and it is easy to cause the loss of the methanogenic bacteria. However, the granulated anaerobic activity with good settleability Sludge takes more than a few months to form under certain conditions

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  • Method for relieving acidic suppression of methanogenic phase during anaerobic digestion of organic wastewater

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Embodiment 1

[0027] Such as figure 1 As shown, the device mainly includes: anaerobic digestion reactor 1, ion exchange resin bag 2, anaerobic aeration unit 3, anaerobic digestion gas phase pressure adjustment switch 4, anaerobic gas buffer unit 5, water inlet 6 and outlet 7 .

[0028] The gas phase pressure in the anaerobic digestion reactor 1 is controlled between 0.102-0.11MPa; when the pressure exceeds 0.11Mpa, the anaerobic digestion gas phase pressure adjustment switch 4 actively exhausts into the anaerobic gas buffer unit 5; the anaerobic digestion reactor 1 When the gas phase pressure is lower than 0.102Mpa during drainage, anaerobic gas is actively transferred from the anaerobic gas buffer unit 5 to the anaerobic digestion reactor 1 through the anaerobic digestion gas phase pressure regulating switch 4 .

[0029] Specific processing methods:

[0030] TiO 2 Improve the settling characteristics of anaerobic activated sludge.

[0031] Both anaerobic reactors A and B are composed o...

Embodiment 2

[0036] The difference from Example 1 is that the simulated organic wastewater added to reactors A and B is a diluted glucose solution with a final BOD concentration of 1280 mg / L, and other operating conditions remain unchanged. Three cycles were run in this way, the average time for reactor A was 12.8 hours, and the average time for reactor B was 24.7 hours. After adding 4% anion exchange resin, the anaerobic digestion cycle was shortened by 47.4%.

Embodiment 3

[0038] The difference from Example 1 is that the simulated organic waste water added in reactors A and B is diluted acetic acid solution with a final BOD concentration of 1920 mg / L, and other operating conditions remain unchanged. Running three cycles in this way, the average time for reactor A is 43.9 hours, and the average time for reactor B is 53.1 hours. After adding 4% anion exchange resin, the anaerobic digestion cycle is shortened by 17.1%.

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Abstract

The invention relates to a method for the anaerobic digestion treatment of organic wastewater, in particular to a method for relieving acidic suppression methanogenic phase during anaerobic digestion of organic wastewater. Firstly, TiO2 is used for improving the settlement property of anaerobic activated sludge so that the concentration of methanogenic activated sludge is improved and the loss of the methanogenic activated sludge is reduced; and then a bicarbonate type strong alkaline ion-exchange resin is used in an anaerobic digestion device, then the proportion of molecular organic acids can be reduced even if the alkalinity of an anaerobic digestion solution is low, so that negative influences of a pH acidic environment in a methanogenic process caused by the accumulation of organic acids are buffered on the whole.

Description

technical field [0001] The invention relates to an anaerobic digestion treatment method of high-concentration organic wastewater, in particular to a method for alleviating the acid inhibition of the anaerobic digestion of organic wastewater in the methanogenic phase. Background technique [0002] With the development of the economy, environmental pollution and energy shortages have become increasingly serious, the anaerobic digestion technology has been favored by people since the late 1960s, and has been widely used in the reduction of organic pollutants. Using anaerobic digestion to treat organic wastewater, especially high-concentration organic wastewater, can recycle bioenergy while reducing pollutants. [0003] The anaerobic digestion process of organic wastewater is mainly divided into three stages: hydrolysis, acid production and methane production. In the hydrolysis stage, cell hydrolytic enzymes hydrolyze macromolecular organic matter into small molecules; The aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCY02E50/30
Inventor 邢颖娜黄斌陈欣史奕
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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