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Efficient mixed flora for treating sludge

A mixed bacterial flora, high-efficiency technology, applied in the direction of sludge treatment, special treatment targets, biological sludge treatment, etc., can solve problems such as technical bottlenecks, no market application and promotion, and large-scale sludge production

Inactive Publication Date: 2016-06-01
YUNNAN SHENGQING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the promulgation and implementation of some new environmental laws, the requirements for the quality of sewage treatment effluent are becoming more and more stringent, which will inevitably lead to an increase in the output of surplus sludge. It is obvious that the treatment and disposal of sludge will become a major problem in the environmental field
[0003] At present, the sludge reduction technologies researched at home and abroad mainly include ozone oxidation technology, ultrasonic cell crushing technology, decoupling technology, acid-base dissolution technology, etc., but there are high costs or technical bottlenecks, and no certain market application and promotion have been formed.
At present, the contradiction between the large scale of sludge production in sewage treatment plants, sludge reduction, and imperfect sludge treatment and disposal technologies has become prominent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In parts by weight, weigh 12 parts of Comamonas testosteroni, 18 parts of Pseudomonas alcaligenes, 35 parts of Stenotrophomonas rhizogenes, 15 parts of Pseudomonas pseudoalcaligenes and 25 parts of Azospirillum parts, and mixed to obtain a mixed flora.

[0016] According to the volume ratio of mixed flora and sludge is 5×10 -4 : 1 amount, add mixed flora to the sludge placed in the aerobic reactor, and react for 6 days under the conditions of pH value 7.5, temperature 30°C and dissolved oxygen 5.0mg / L. The amount of sludge is reduced by 55% (mass percentage), the SV30 is obviously reduced, the effect of sludge settlement is improved, and the suspension of supernatant is reduced. The mixed flora can reduce the amount of excess sludge and improve the settling performance of excess sludge. The supernatant after sludge reduction is finally returned to the biochemical pool of the sewage treatment system, and the effluent from the biochemical pool is tested. All indicators ...

Embodiment 2

[0018] In parts by weight, weigh 20 parts of Comamonas testosteroni, 25 parts of Pseudomonas alcaligenes, 50 parts of Stenotrophomonas rhizogenes, 25 parts of Pseudomonas pseudoalcaligenes and 40 parts of Azospirillum parts, and mixed to obtain a mixed flora.

[0019] According to the volume ratio of mixed flora and sludge is 1×10 -3 : 1 amount, add the mixed flora to the sludge placed in the aerobic reactor, and react for 7 days under the conditions of pH value 9.0, temperature 40°C and dissolved oxygen 8.0mg / L. The amount of sludge is reduced by 58% (mass percentage), the SV30 is obviously reduced, the sludge settling effect is improved, and the supernatant suspended matter is reduced. The mixed flora can reduce the amount of excess sludge and improve the settling performance of excess sludge. The supernatant after sludge reduction is finally returned to the biochemical pool of the sewage treatment system, and the effluent from the biochemical pool is tested. All indicator...

Embodiment 3

[0021] In parts by weight, weigh 5 parts of Comamonas testosteroni, 10 parts of Pseudomonas alcaligenes, 20 parts of Stenotrophomonas rhizogenes, 5 parts of Pseudomonas pseudoalcaligenes and 10 parts of Azospirillum parts, and mixed to obtain a mixed flora.

[0022] According to the volume ratio of mixed flora and sludge is 1×10 -4 : 1 amount, add mixed flora to the sludge placed in the aerobic reactor, and react for 5 days under the conditions of pH 6.0, temperature 20°C and dissolved oxygen 2.0mg / L. The amount of sludge is reduced by 53% (mass percentage), the SV30 is obviously reduced, the effect of sludge settlement is improved, and the suspension of supernatant is reduced. The mixed flora can reduce the amount of excess sludge and improve the settling performance of excess sludge. The supernatant after sludge reduction is finally returned to the biochemical pool of the sewage treatment system, and the effluent from the biochemical pool is tested. All indicators are up t...

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Abstract

The invention discloses efficient mixed flora for treating sludge which comprises comamonas testosteroni, pseudomonas alcaligenes, stenotrophomonas rhizophila, pseudomonas pseudoalcaligenes and azospirillum. The mixed flora can effectively decompose the sludge.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, in particular to a high-efficiency mixed bacterial group for treating sludge. Background technique [0002] The activated sludge method is mostly used in the treatment of urban sewage in our country. It has the advantages of low capital investment and good treatment effect, but it has always had one of the biggest drawbacks, that is, a large amount of excess sludge will be generated during operation. Excess sludge usually contains more toxic and harmful substances and unstabilized organic matter. If it is not properly treated and disposed of, it will cause direct or potential pollution to the environment. In the traditional activated sludge method, the degradation of 1kgBOD5 (biochemical OxygenDemand, five-day biochemical oxygen demand) will produce about 15-100L of excess sludge, and the cost of treating or disposing of excess sludge accounts for about 25% of the total cost of sewage tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C02F11/02C12R1/01C12R1/38
CPCC02F11/02C02F2303/06C12N1/20Y02W10/20
Inventor 宣志刚黄志红顾开林宋羽飞
Owner YUNNAN SHENGQING ENVIRONMENTAL PROTECTION TECH CO LTD
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