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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AI Technical Summary

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, whi

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Examples

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Example Embodiment

[0037] Example 1

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

[0039] (1) Inoculated sludge: Anaerobic flocculent sludge from a fermentation pharmaceutical factory in Anhui was used as inoculated sludge. The type and content of AHLs in the inoculated flocculent sludge were tested qualitatively and quantitatively, and C8-HSL was confirmed as the main AHLs. Choose C8-HSL as the externally added AHL; the initial inoculation concentration is 30g / L, the average sludge particle size is 92μm; EGSB reactor: made of PVC (polyvinyl chloride) material, its effective volume is 1.87L;

[0040] (2) The said sewage uses laboratory synthetic organic wastewater, and its components are: glucose 1000-3000mg / L, ammonia nitrogen is 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. The concentrations of trace elements are 18.75mg / L...

Example Embodiment

[0048] Example 2

[0049] An EGSB reactor of the same specification without adding exogenous signal molecules and adding exogenous signal molecules was used to granulate the flocculent sludge of an alcohol plant to compare its granulation rate.

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

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

[0052] The said sewage uses laboratory synthetic organic wastewater, and its components are: glucose 1000-3000mg / L, ammonia nitrogen is 25-7...

Example Embodiment

[0063] Example 3

[0064] Adopt EGSB reactor of the same specification without adding exogenous signal molecules and adding exogenous signal molecules to granulate the flocculent sludge of a fermentation pharmaceutical factory, and use the influent water of the anaerobic process section of the plant as the reactor influent water. Its granulation rate.

[0065] Qualitative and quantitative detection of the type and content of AHLs in inoculated flocculent sludge confirmed that C8-HSL and C10-HSL are the main AHLs, and the concentration ratio of the two is 1:2, so C8-HSL and C10-HSL are selected as external sources. The concentration ratio of the AHLs is 1:2.

[0066] The basic indicators of actual 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 and denoted a...

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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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