Method for treating sewage by utilizing compound bacteria

A technology of complex bacterial flora and complex bacterial species, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of unstable microbial species and quantities, affecting effluent stability and compliance Sexuality, low index of domestic sewage pollutants, etc., to achieve the effect of solving the decline of bacteria, the conditions are not harsh, and the survival rate of bacteria is high

Active Publication Date: 2016-05-25
NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing traditional biochemical process, at high or low temperature, the natural activated sludge has limited treatment effect on pollutants, the types and quantities of microorganisms in the natural system are unstable, the start-up period of the biochemical system is long, and the life The pollutant index of sewage is low, the distribution of dissolved oxygen in water is uneven, and the impact resistance is not strong.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step 1: Fill the biochemical pool with clean water and aerate to make the dissolved oxygen in the pool water reach 3mg / L; then add 10 parts of lactic acid bacteria group, 12 parts of yeast group, 5 parts of gram-positive actinomycetes and 5 parts of acetic acid bacteria, 10 live bacteria per gram 9 ~10 11 ;

[0016] Step 2, add 40 parts of glucose to make the COD of the water in the pool reach 800mg / L;

[0017] Step 3, then add 4 parts of urea, 1.8 parts of potassium dihydrogen phosphate, and 0.4 parts of vitamin C to the pool, aerate and increase the oxygen in the biochemical pool, and maintain the dissolved oxygen in the pool water at 1 mg / L, so as to promote the growth of the bacterial agent on the filler to form a biofilm ;

[0018] Step 4, continuously feed sewage (in which oil content is 80-100mg / L, sulfide is 30-50mg / L, total salinity is 22000mg / L, C:N:P ratio is about 20:1:1, influent COD360mg / L , BOD150mg / L), the temperature of sewage is 30°C, and the flow ...

Embodiment 2

[0022] Step 1: Fill the biochemical pool with clean water and aerate to make the dissolved oxygen in the pool water reach 4 mg / L; then add 13 parts of lactic acid bacteria, 15 parts of yeast, 10 parts of gram-positive actinomycetes and 12 parts of acetic acid bacteria, 10 live bacteria per gram 9 ~10 11 ;

[0023] Step 2, add 60 parts of glucose to make the COD of the water in the pool reach 800mg / L;

[0024] Step 3, then add 6 parts of urea, 2.2 parts of potassium dihydrogen phosphate, and 0.6 parts of vitamin C to the pool, aerate the biochemical pool to increase oxygen, maintain the dissolved oxygen in the pool water at 3mg / L, and promote the growth of the bacterial agent on the filler to form a biofilm ;

[0025] Step 4, continuously feed sewage (in which oil content is 80-100mg / L, sulfide is 30-50mg / L, total salinity is 22000mg / L, C:N:P ratio is about 20:1:1, influent COD360mg / L , BOD150mg / L), the temperature of sewage is 30°C, and the flow of sewage is 5-20m 3 / h, c...

Embodiment 3

[0029] Step 1: Fill the biochemical pool with clean water and aerate to make the dissolved oxygen in the pool water reach 3mg / L; then add 10 parts of lactic acid bacteria group, 12 parts of yeast group, 5 parts of gram-positive actinomycetes and 5 parts of acetic acid bacteria, 10 live bacteria per gram 9 ~10 11 ;

[0030] Step 2, add 60 parts of glucose to make the COD of the water in the pool reach 800mg / L;

[0031] Step 3, then add 6 parts of urea, 2.2 parts of potassium dihydrogen phosphate, and 0.6 parts of vitamin C to the pool, aerate the biochemical pool to increase oxygen, maintain the dissolved oxygen in the pool water at 1-3 mg / L, and promote the growth of bacteria on the filler. Biofilm;

[0032] Step 4, continuously feed sewage (in which oil content is 80-100mg / L, sulfide is 30-50mg / L, total salinity is 22000mg / L, C:N:P ratio is about 20:1:1, influent COD360mg / L , BOD150mg / L), the temperature of sewage is 30°C, and the flow of sewage is 5-20m 3 / h, continuous...

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PUM

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Abstract

The invention discloses a method for treating sewage by utilizing compound bacteria. Different compound bacteria are creatively adopted and are added in steps. The method for treating sewage by utilizing the compound bacteria comprises the following concrete steps: adding clear water into a biochemical pool until the biochemical pool is filled with the clear water, and aerating until dissolved oxygen in pool water reaches 3-4 mg/L; then adding a first part of compound bacteria, wherein viable count per gram is 109-1011; then adding glucose until COD of water body in the pool reaches 800mg/L; then adding urea, potassium dihydrogen phosphate and vitamin C into the pool; aerating the biochemical pool for oxygenation, so as to keep dissolved oxygen of the pool water to be 1-3 mg/L, and promoting bacteria to grow into a biological film on filler; and continuously introducing sewage at a flow of 5-20 m<3>/h, after 24 hours, adding a second part of compound bacteria into the pool until C:N:P in the pool is 100:(1-1.1):5, and aerating the pool water for keeping the dissolved oxygen to be not less than 4 mg/L.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating sewage by using complex flora. Background technique [0002] The main pollutants of sewage are pathogenic pollutants, oxygen-consuming pollutants, plant nutrients, toxic pollutants, etc. Sewage discharged directly without treatment will cause eutrophication of the water body, which in turn will lead to hypoxia, odor, algal blooms, fish death, etc., seriously destroying the ecological balance of the water body. [0003] In recent years, with the acceleration of urbanization and rapid economic development, fresh water resources have become increasingly scarce, and many coastal cities have begun to implement direct use of seawater, such as for industrial cooling water, industrial production water, and urban domestic water. The increase in the use of seawater will lead to an increase in the discharge of high-salinity sewage. At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F3/34
Inventor 田宝凤
Owner NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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