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Method for improving anaerobic sludge granulation efficiency

An anaerobic sludge and granulation technology, applied in anaerobic digestion treatment, chemical instruments and methods, biological treatment adjustment methods, etc. The effect of improving efficiency

Active Publication Date: 2017-11-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although there are more and more reports on the regulation of microbial biochemical behavior by AHLs signaling molecules, these reports mainly focus on the granulation of aerobic sludge and the promotion of biofilm formation, while the regulation of AHLs in anaerobic sludge granulation is still unknown. There is a lack of systematic research, and the precise control of the growth of anaerobic sludge granulation through signal molecules needs further exploration

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Effect test

Embodiment 1

[0038] A method for improving the efficiency of anaerobic sludge granulation, the specific steps are as follows:

[0039] (1) Inoculation sludge: Anaerobic flocculent sludge was taken from a fermentation pharmaceutical factory in Anhui as inoculation sludge. The types and contents of AHLs in the inoculation flocculent sludge were qualitatively and quantitatively detected, and C8-HSL was confirmed as the main AHLs. C8-HSL was selected as the exogenously added AHL; the initial inoculum concentration was 30g / L, and the average particle size of the sludge was 92μm; EGSB reactor: made of PVC (polyvinyl chloride) material, and its effective volume was 1.87L;

[0040] (2) The sewage is synthetic organic wastewater in the laboratory, and its components are: glucose 1000-3000mg / L, ammonia nitrogen 25-75mg / L, sodium dihydrogen phosphate dihydrate 25.2-75.5mg / L, sodium bicarbonate 1000-3000mg / L; trace elements are also added to the organic wastewater, and the concentrations of the trace ...

Embodiment 2

[0049] The flocculent sludge of an alcohol factory was granulated by using the same specification EGSB reactor without adding exogenous signal molecules and adding exogenous signal molecules, and the granulation rate was compared.

[0050] Qualitative and quantitative detection of the types and contents of AHLs in the inoculated flocculent sludge confirmed that C10-HSL was the main AHLs, so C10-HSL was selected as the exogenously added AHL.

[0051] The EGSB reactor without exogenous signal molecules was used as the control group, denoted as R0, and the EGSB reactor added with exogenous signal molecules was used as the experimental group, denoted as R1. The initial inoculum concentration is 30g / L, and the average particle size of the sludge is 122μm; EGSB reactor: made of PVC (polyvinyl chloride) material, and its effective volume is 1.87L;

[0052] The sewage is synthesized organic wastewater in the laboratory, and its components are: glucose 1000-3000mg / L, ammonia nitrogen 2...

Embodiment 3

[0064] The flocculent sludge of a fermentation pharmaceutical factory was granulated by using EGSB reactors of the same specification without adding exogenous signal molecules and adding exogenous signal molecules, and the influent of the anaerobic process section of the plant was used as the influent of the reactor. its granulation rate.

[0065] Qualitative and quantitative detection of the types and contents of AHLs in the inoculated flocculent sludge confirmed that C8-HSL and C10-HSL were the main AHLs, and the concentration ratio of the two was 1:2, so C8-HSL and C10-HSL were selected as exogenous additions For AHLs, the concentration ratio is 1:2.

[0066] The actual basic indicators of organic wastewater are: COD 5998±623mg / L, ammonia nitrogen 368±54mg / L, total nitrogen 380±48mg / L, total phosphorus 5.1±1.8mg / L, pH range 7.2-7.8, Cl - The concentration is about 3000mg / L.

[0067] The EGSB reactor without exogenous signal molecules was used as the control group, denoted...

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Abstract

The invention discloses a method for improving the anaerobic sludge granulation efficiency, and belongs to the field of organic waste water treatment. The method for improving the anaerobic sludge granulation efficiency is provided for the problems that the anaerobic granular sludge culture circle is long, the granule stability is poor, and the culture cost is high in the prior art. The method comprises the steps that an appropriate number of organically synthesized acyl-homoserine lactone (AHL) signal molecules are added into the bottom of an EGSB reactor used for anaerobic sludge granulation culture periodically and mixed with anaerobic sludge, the addition cycle is the same as the hydraulic retention time, and the advantages that the anaerobic sludge granulation efficiency is high, the cost is low, the needed granulation time is greatly shortened, the formed granular sludge is good in stability, the structure is simple, and operation is convenient can be achieved.

Description

technical field [0001] The invention belongs to the field of organic wastewater treatment, and specifically relates to a method for improving anaerobic sludge granulation efficiency and treating organic wastewater, which is used for organic wastewater treatment. Background technique [0002] From the perspective of the growth mode of microorganisms in the reactor, wastewater bioreactors are divided into two types: the first is the attached growth reactor, the microorganisms of this type of reactor grow in the form of biofilm on the solid support, and the disadvantage is that the filler is expensive , the processing load is relatively low, and the power consumption is large; the second is a suspension growth reactor, which requires stirring (or other methods) to keep the microorganisms in suspension. Suspension growth reactor is a perfect combination of granular fluidized bed technology and bioreactor. It uses granular sludge as the biological phase and overcomes the shortcom...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/006C02F3/2813C02F2305/06
Inventor 任洪强马海军耿金菊丁丽丽
Owner NANJING UNIV
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