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Method for treating urban sewage by using microbial compound bacteria

A technology of microbial compound bacteria and urban sewage, applied in the field of kitchen and kitchen waste sewage, can solve the problems of high power consumption and large floor space, and achieve space saving, energy saving, and aeration device reduction. small effect

Active Publication Date: 2021-06-22
马东兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, the current activated sludge method has the following problems: BOD is required for denitrification 5 / TKN≥4, for influent BOD 5 Low sewage needs a large amount of glucose, methanol, sodium acetate and other substances to supplement BOD 5 Insufficient; covers an area of ​​large, high power consumption

Method used

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  • Method for treating urban sewage by using microbial compound bacteria

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0082] (1) Preparation of microbial compound bacteria preparation

[0083] Compound bacteria preparation I:

[0084] Step 1: Bacillus megaterium, Bacillus natto, Pseudomonas aeruginosa, Lactobacillus acidophilus, Torulopsishistolytica, Aspergillus niger, black Rhizopus nigricans, Penicillium Camemberti, Penicillium Luteum, Mucorracemosus Fres fungi, Trichoderma viride, Thiocapsaroseopersicina ), Azotobacter chrococcum and Nitrosomonas europaea were activated and expanded in a medium including yeast extract 5g / L, tryptone 10g / L and sodium chloride 5g / L , to obtain expanded cultures;

[0085] Step 2: In parts by weight of the culture, 75 parts of Bacillus megaterium, 1 part of Bacillus natto, 5 parts of Pseudomonas aeruginosa, 1 part of Lactobacillus acidophilus, 0.5 part of Thiobacillus peach, and nitrogen-fixing Bacteria 3 parts and 2.5 parts of Nitrosomonas european expanded culture were inserted into liquid medium 1 (formulation is as follows: peptone 3g / L, NaCl 5g / L, K ...

Embodiment 1

[0111] Step 1): The sewage produced by the kitchen waste factory passes through the oil separation sedimentation tank and the air flotation tank to remove the suspended solids and oily substances in the sewage. The initial CODcr value of the kitchen waste wastewater is 13240mg / L, BOD 5 The value is 5679mg / L, the TN value is 2896mg / L and NH 3 -N value is 2347mg / L.

[0112] Step 2): Make the effluent from the air flotation tank enter the intermediate pool, mix the effluent from the air flotation tank and the sludge returned from the secondary sedimentation tank by a mixer, mix evenly, the mixing time is not less than 1 hour, adjust the water quality and quantity, and the effluent of the intermediate pool flows automatically In the biological turntable pool, the biological turntable rotates at a constant speed of 3.5 revolutions per minute for 24 hours, wherein the hydraulic retention time in the biological turntable pool is 1.5 hours.

[0113] Step 3): The effluent from the bio...

Embodiment 2

[0117] Except that the microbial complex bacterium preparation I is replaced by the above-mentioned prepared microbial complex bacterium preparation II, all the other steps are the same as in Example 1.

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Abstract

The invention relates to a method for treating urban sewage by using microbial compound bacteria. The method comprises the following steps: removing suspended matters and oil substances in sewage through an oil separation sedimentation tank and an air floatation tank; balancing the water quality of the intermediate pool; carrying out biological rotating disc pool treatment; carrying out biological tank nitrification and denitrification treatment; and carrying out solid-liquid separation in a secondary sedimentation tank. A microbial compound bacterium preparation and a microbial growth promoting nutrient are added into the biological tank. The sewage treatment method disclosed by the invention has the advantages of efficient denitrification and organic matter removal effects, occupied space saving and good effluent quality.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for treating urban sewage, especially kitchen and kitchen waste sewage, by using microbial complex bacteria. Background technique [0002] With the rapid increase of urban population and the rapid development of industry, the problem of environmental pollution is becoming increasingly serious. There are more and more domestic sewage, landfill leachate wastewater, kitchen and kitchen waste wastewater, industrial wastewater, black and odorous water bodies in rivers, etc. within the city, and a large amount of domestic and industrial sewage continue to flow into rivers and seep into groundwater. These pollution It has a great negative impact on human health and the sustainable development of society. [0003] The sewage of kitchen waste, kitchen waste and landfill leachate mainly comes from biogas residue filtrate produced by anaerobic kitchen and kitc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/14C12N1/20C02F9/14C02F3/34C02F3/30C12R1/885C12R1/065C12R1/07C12R1/225C12R1/38C12R1/66C12R1/785C12R1/80C12R1/845
CPCC12N1/20C12N1/14C02F9/00C02F3/34C02F3/302C02F2301/08Y02W10/10
Inventor 马东兵阿部哲弥岳峥王爱平潘晓峰刘学霍玉丰李军王广成叶蓉
Owner 马东兵
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