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Method for processing sewerage by A/O biological contact oxidation process

A technology of biological contact and oxidation, which is applied in the field of environmental engineering, can solve the problems of sludge swelling, poor water quality adaptability, unstable effluent water quality, etc., and achieves convenient membrane removal, good sewage treatment effect, and beneficial metabolism Effect

Inactive Publication Date: 2008-12-24
台州盛世环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of activated sludge to treat sewage requires an aeration tank with a large area, which has poor adaptability to water quality, poor impact resistance, unstable effluent quality, and sludge swelling.

Method used

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  • Method for processing sewerage by A/O biological contact oxidation process
  • Method for processing sewerage by A/O biological contact oxidation process
  • Method for processing sewerage by A/O biological contact oxidation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The water quality of the sewage to be treated is shown in Table 1. After the above-mentioned sewage flows into the domestic sewage sump with the specification of 2.0m×2.0m×1.0m after pretreatment for 8 hours, it is passed through the sewage lifting pump (model: SF-10- 1: Power: 0.55KW) into the hydrolysis tank;

[0028]The hydrolysis tank is filled with polyethylene plastic semi-soft floating ball filler, and the anaerobic sludge is cultivated intermittently. The specific process is to pour the anaerobic sludge that has been statically cultivated for about 2 weeks into the hydrolysis tank. About 1 / 10 of the total volume of the hydrolysis tank, fill the hydrolysis tank with artificial water distribution, and then aerate once with a Roots fan (power 0.75kw, inlet flow rate 1.09m3 / min, speed 1140r / min, boost pressure 19.6KPa) Oxygen sludge is evenly distributed in the hydrolysis tank, and after standing for a period of time, a dense and dense biofilm is formed on the inner...

Embodiment 2

[0032] The pretreatment time of domestic sewage in the sump is 10 hours. The hydrolysis tank is filled with moso bamboo fiber semi-soft floating ball packing. Anaerobic bacteria or anoxic bacteria are cultivated with the activated sludge in the sewage itself. The biomass of anoxic bacteria is 80g / m 3 , anaerobic bacteria or anoxic bacteria hydrolyze the sewage in the hydrolysis tank for 4 hours, and the aerobic tank is filled with moso bamboo fiber semi-soft floating ball fillers that account for 3 / 4 of the volume of the entire aerobic tank. Bacteria are cultivated by the activated sludge in the sewage itself, and the biomass of aerobic bacteria is 70g / m 3 , the aerobic bacteria aerated the sewage in the aerobic tank for 10 hours, and the other technological processes were the same as those in Example 1, so no further details were given. The water quality indicators of the test are shown in Table 1, and the water that passes the test can be directly discharged into the enviro...

Embodiment 3

[0034] The pretreatment time of domestic sewage in the sump is 15 hours. The hydrolysis tank is filled with polypropylene plastic semi-soft floating ball packing. The biomass of bacteria is 100g / m 3 , anaerobic bacteria or anoxic bacteria hydrolyze the sewage in the hydrolysis tank for 3 hours, and the aerobic tank is filled with moso bamboo fiber semi-soft floating ball fillers that account for 2 / 3 of the volume of the entire aerobic tank. Bacteria are cultivated by the activated sludge in the sewage itself, and the biomass of aerobic bacteria is 50g / m 3 , the aerobic bacteria aerated the sewage in the aerobic tank for 12 hours, and the other technological processes were the same as those in Example 1, so no further details were given. The water quality indicators of the test are shown in Table 1, and the water that passes the test can be directly discharged into the environment. The entire process flow chart is shown in Figure 1.

[0035] Table 1: Comparison of waste water...

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Abstract

The invention provides a sewage treatment method using A / O biological contact oxidation process belonging to environmental engineering technology field, which solves the problems that in the prior art the adaptability of water quality is not strong, the impact resistance perfermance is weak, the effluent water quality is unstable and sludge bulks or the like. The sewage treatment method using A / O biological contact oxidation process comprises the following steps: A. pretreatment; B. hydrolytic treatment; C. aeration treatment; D. deposition and disinfection, and has advantages of high volume loading, rapid rate of biodegradation and low cost.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a biofilm method, that is, a method for treating sewage by using an A / O biological contact oxidation method. It belongs to the field of environmental engineering technology. Background technique [0002] Modern sewage treatment technology can be divided into primary, secondary and tertiary treatment according to the degree of treatment. Primary treatment mainly removes suspended solid pollutants in sewage, and most physical treatment methods can only meet the requirements of primary treatment. After primary treatment, BOD can generally be removed by about 30%, which does not meet the discharge standard. Primary treatment belongs to the pretreatment of secondary treatment. The secondary treatment mainly removes colloidal and dissolved organic pollutants (BOD, COD substances) in the sewage, and the removal rate can reach more than 90%, so that the organic pollutants can meet the disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李长友
Owner 台州盛世环境工程有限公司
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