Compound microbial agent for urban sewage treatment, preparation method and application thereof

A technology for compounding microbial inoculants and urban sewage, which is applied in the field of sewage treatment and sewage treatment using microbial methods, can solve the problems of difficult to meet discharge standards, difficult targeted treatment, poor biodegradability, etc., and achieve good degradation effect, The effect of improving the treatment effect and improving the biodegradability

Inactive Publication Date: 2015-01-14
HANYU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, urban sewage has a wide range of sources, and it is difficult to find the source of sewage with poor biodegradability in stages, and it is difficult to do targeted treatment; secondly, the current urban sewage treatment processes basically use biological methods, and it is difficult to treat sewage with poor biochemical properties for discharge standard

Method used

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  • Compound microbial agent for urban sewage treatment, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example is the preparation example of composite microbial bacterial agent.

[0028] Composition and ratio of compound microbial agent: Bacillus subtilis (1~9)×10 10 Individual / g, Bacillus licheniformis (1~9)×10 10 Individual / g, Lactobacillus plantarum (1~9)×10 8 Individual / g, Hansenula (1~9)×10 9 Individual / g, Saccharomyces cerevisiae (1~9)×10 9 pcs / g.

[0029] The above five strains can be obtained from the Guangdong Microbial Culture Collection Center, and the numbers are: Saccharomyces cerevisiae: ATCC26785, Hansenula: AS2.302, Bacillus subtilis: ATCC6633, Bacillus licheniformis: ACCC10236, Lactobacillus plantarum: ATCC8014 .

[0030] Preparation of compound microbial bacterial agent:

[0031] 1. Separate expansion culture of each strain:

[0032] 1) Primary seed cultivation:

[0033] Bacillus subtilis and Bacillus licheniformis were inoculated on nutrient agar slant medium, Lactobacillus plantarum was inoculated on MRS slant medium, and Saccharomyces ce...

Embodiment 2

[0040] This example is to test the effect of compound microbial agent on improving sewage biodegradability and reducing COD cr An experimental example of the value aspect effect.

[0041] (1) The effect of improving the biodegradability of sewage.

[0042] m (BOD 5 ) / m(COD cr ) reflects the biochemical properties of sewage, less than 0.3 indicates that biochemical treatment is not easy, and greater than 0.3 indicates that biochemical treatment is possible. Under the condition of a certain amount of dissolved oxygen, the bacterial agent can decompose macromolecules and refractory substances into biochemical small molecular substances, and improve the biochemical properties of sewage. Take two parts of urban sewage with poor biochemical properties, use a 20L bucket as the test container with stirring, adjust the pH of the sewage to 6.5-7.0, and the water temperature to 25-30°C. Add 2 g of bacterial agents to the test group, but not to the control group. Stop stirring after ...

Embodiment 3

[0050] This example is an application example of using the composite microbial agent of the present invention to treat urban sewage.

[0051] In this example, the composite microbial agent prepared in Example 1 is used to treat urban sewage with poor biochemical properties, using integrated sewage treatment equipment with a volume of 1m 3 , the process is self-flowing aerobic-anaerobic alternation, and the influent water quality is COD cr : 314mg / L, BOD 5 : 64mg / L, before using this bacterial agent, the effluent water quality is COD cr :131mg / L, BOD 5 : 27mg / L. Add 20g of compound microbial agent to the water inlet after activation, and continue to add it for 3-7 days. Stop adding when the filler in the equipment is normally filmed. After treatment, the effluent quality is COD cr :68mg / L, BOD 5 :15.6mg / L, COD cr The removal rate reached 78.3%.

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Abstract

The invention provides a compound microbial agent for urban sewage treatment. The compound microbial agent comprises a compound thallus which is compounded by bacillus subtilis, bacillus licheniformis, lactobacillus plantarum, hansenula polymorpha and saccharomyces cerevisiae. The compound microbial agent provided by the invention can be used for reasonably combining various strains capable of forming a dominant bacterial community, has a good degrading effect to macromolecules and degradation-resistant organic matters by being added into a sewage treatment system in a certain proportion, and can be used for effectively improving the biodegradability of sewage, reducing CODcr and BOD5 of urban sewage with poor biodegradability and purifying the water quality.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to the technical field of sewage treatment using microbial methods. Background technique [0002] In recent years, in order to reverse the trend of continuous deterioration of my country's water environment quality, the national and local governments have continuously increased investment in the construction of urban sewage treatment plants and the treatment of polluted water bodies. However, in the existing water pollution control system, biological treatment has always been the core technical means, from the in-plant pretreatment of industrial sewage to the centralized treatment of urban sewage treatment plants, and even the restoration of environmental water bodies receiving tail water. The degraded pollutants will not only penetrate the whole system, but also affect its treatment effect to a great extent. [0003] The biodegradability of sewage refers to the performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12N1/18C12N1/16C02F3/34C12R1/10C12R1/125C12R1/25C12R1/78C12R1/865
CPCC12N1/20C02F3/34C02F3/347C02F3/348C12N1/16C12N1/18
Inventor 周幸芝
Owner HANYU GRP CO LTD
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