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Method for treating domestic sewage by aid of complex bacteria

A domestic sewage and compound bacterial agent technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problem of limited treatment effect, low index of domestic sewage pollutants, and distribution of dissolved oxygen in water Inequalities to achieve the effect of shortening the start-up cycle

Inactive Publication Date: 2015-12-30
重庆淏园环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional biochemical process, under high or low temperature conditions, natural activated sludge has limited treatment effect on pollutants, the types and quantities of microorganisms in natural systems are unstable, the start-up period of biochemical systems is long, and the pollutant indicators of domestic sewage Low, uneven distribution of dissolved oxygen in water, poor impact resistance, etc., all of which affect the stability and compliance of the effluent to a certain extent, and there is a bottleneck in the standard upgrading project

Method used

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  • Method for treating domestic sewage by aid of complex bacteria

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Small-scale domestic sewage treatment point, the treatment scale is 1000m3 / d, the raw water COD is 210.5mg / L, SS is 213.5mg / L, ammonia nitrogen is 25.8mg / L, TN is 45.9mg / L, TP is 4.6mg / L, The pH is 7.2. The first dose of anoxic compound bacteria is 110kg, the dose of aerobic compound bacteria is 110kg, and the second dose of both compound bacteria is 11kg. After 30 days of continuous observation, the average effluent quality is COD It is 28.7mg / L, SS is 2.1mg / L, ammonia nitrogen is 1.5mg / L, TN is 14.8mg / L, TP is 0.5mg / L, and pH is 7.5, which meets the Pollutant Discharge Standard for Urban Sewage Treatment Plants ( GB18918-2002) Grade A standard.

Embodiment 2

[0044] Small-scale domestic sewage treatment point with a treatment scale of 500m 3 / d, the raw water COD is 367.1mg / L, SS is 254.9mg / L, ammonia nitrogen is 42.6mg / L, TN is 53.7mg / L, TP is 4.3mg / L, and pH is 6.9. The dosage of the first hypoxic complex bacteria is 81.6kg, the dosage of aerobic complex bacteria is 81.6kg, and the second dosage of both complex bacteria is 8.2kg. After continuous observation for 30 days, the average effluent The water quality is 36.7mg / L for COD, 2.5mg / L for SS, 4.2mg / L for ammonia nitrogen, 14.5mg / L for TN, 0.3mg / L for TP, and pH 6.9, which meets the requirements of "Pollutant Discharge from Urban Sewage Treatment Plants" Standard" (GB18918-2002) Grade A standard.

Embodiment 3

[0046] Small-scale domestic sewage treatment point with a treatment scale of 200m 3 / d, the raw water COD is 450.1mg / L, SS is 280.6mg / L, ammonia nitrogen is 45.7mg / L, TN is 51.8mg / L, TP is 4.5mg / L, and pH is 7.1. The dosage of the first hypoxic compound bacterial agent is 23.5kg, the dosage of aerobic compound bacterial agent is 23.5kg, and the second dosage of both compound bacterial agents is 2.4kg. After continuous observation for 30 days, the average effluent The water quality is 40.8mg / L for COD, 2.3mg / L for SS, 4.1mg / L for ammonia nitrogen, 14.8mg / L for TN, 0.3mg / L for TP, and pH 7.0, which meets the requirements of "Emissions of Pollutants from Urban Sewage Treatment Plants" Standard" (GB18918-2002) Grade A standard.

[0047] The beneficial effects of the method for treating domestic sewage by using the composite bacterial agent of the present invention:

[0048] 1. The influence of too high or too low ambient temperature on the treatment effect is reduced;

[0049] 2. The m...

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Abstract

The invention discloses a method for treating domestic sewage by the aid of complex bacteria. The method includes mixing and homogenizing the domestic sewage in regulating basins after the domestic sewage flows through coarse grids and fine grids; pumping the sewage in the regulating basins into integral membrane bioreactors by the aid of lifting pumps; respectively adding the hypoxia complex bacteria and the aerobic complex bacteria into the integral membrane bioreactors at specific moments; enabling the integral membrane bioreactors to stably run for a month; respectively supplementing small quantities of the hypoxia complex bacteria and the aerobic complex bacteria into the integral membrane bioreactors. The method has the advantages that the COD (chemical oxygen demand) removal rate of the treated sewage is 85%-95%, the BOD5 (biochemical oxygen demand 5) removal rate of the treated sewage is 90%-95%, the ammonia and nitrogen removal rates of the treated sewage are 90%, the TN (total nitrogen) removal rate of the treated sewage is 60%, the SS (suspended solid) removal rate of the treated sewage is 99%, the TP (total phosphorus) removal rate of the treated sewage is 75%-85%, and the quality of drained water can stably reach primary A standards of Pollutant Discharge Standards for Municipal Sewage Treatment Plants (GB 18918-2002).

Description

Technical field [0001] The invention belongs to the field of domestic sewage treatment, and specifically relates to a method for treating domestic sewage by using a composite bacterial agent and an integrated membrane bioreactor. Background technique [0002] Domestic sewage usually refers to the discharged water from life that is polluted to a certain extent. The main pollutants of sewage include pathogenic pollutants, oxygen-consuming pollutants, plant nutrients, and toxic pollutants. Domestic sewage discharged directly without treatment will cause eutrophication of the water body, which will lead to hypoxia, odor, algae growth, fish death, etc., which seriously damage the ecological balance of the water body. [0003] The integrated membrane bioreactor successfully combines the equipment, integration and mobility of biochemical reaction and membrane isolation technology. It is a new type of wastewater treatment system that combines membrane separation technology and biological...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F3/34
Inventor 龚云霄权攀
Owner 重庆淏园环保科技有限公司
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