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Anaerobic-anoxic oxidation pitch technique denitrification dephosphorization device and method

A technology of denitrification phosphorus removal and oxidation ditch, applied in the field of biological nitrogen and phosphorus removal of domestic sewage, can solve the problems of low phosphorus removal efficiency, achieve the effect of increasing pH value, saving aeration energy consumption, and stabilizing biological phosphorus removal

Active Publication Date: 2008-05-28
中山公用水务投资有限公司
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Problems solved by technology

[0011] The purpose of the present invention is to provide a kind of anaerobic-anoxic oxidation ditch process denitrification dephosphorization device and method, to solve the problem of low biological denitrification and phosphorus removal efficiency when the influent carbon nitrogen ratio of oxidation ditch process is low, thereby Promote the stability and high efficiency of biological nitrogen and phosphorus removal

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  • Anaerobic-anoxic oxidation pitch technique denitrification dephosphorization device and method

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specific Embodiment 1

[0032] The inoculated sludge was from the return sludge of Beijing Jiuxianqiao Sewage Treatment Plant, and the test water was taken from the aerated grit chamber of Beijing Jiuxianqiao Sewage Treatment Plant. The main water quality indicators in the experimental stage are: COD is 232 ~ 621mg / L, NH 4 + 42.1~64.5mg / L, PO 4 3-It is 5.2-9.1 mg / L, TP is 5.9-9.7 mg / L, TN is 56.4-73.5 mg / L, pH is 7.2-7.8. The analytical methods used in the experiments were in accordance with the standard methods issued by the State Environmental Protection Administration.

[0033] The test steps are to add the inoculated sludge into the aeration tank 8, put the domestic sewage into the water tank 1, start the inlet pump A2 and the inlet pump B3, and 70-80% of the raw sewage and 25-50% of the return sludge are in the tank. Mixed by agitator 7 in anaerobic tank 4, a small amount of NO in sludge is returned 3 - It is quickly removed by denitrification by heterotrophic bacteria, and phosphorus accu...

specific Embodiment 2

[0035] The inoculated sludge was from the return sludge of the Jiuxianqiao Sewage Treatment Plant in Beijing, and the test water was taken from the domestic sewage of the municipal pipeline of the Family Pool of Beijing University of Technology. The main water quality indicators are: COD is 201 ~ 532mg / L, NH 4 + 47.5 / 61.9mg / L, PO 4 3- was 3.4 / 8.6 mg / L, TN was 52.4 / 68.3 mg / L, and pH was 7.2 / 7.8. The analytical methods used in the experiments were in accordance with the standard methods issued by the State Environmental Protection Administration.

[0036] The test procedure is to add the inoculated sludge into the aeration tank 8, put the domestic sewage into the water tank 1, start the inlet water pump A2 and the inlet water pump B3, and the water inlet ratio of the inlet water pumps A2 and B3 is 4:1, and at the same time, the backflow is turned on. The flow ratio of sludge pumps A18 and B19 and return sludge pumps A18 and B19 is 1:3. Through continuous treatment of domesti...

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Abstract

The invention relates to an anaerobic-anoxic oxidation ditch technique denitrification dephosphorization device and a method thereof, and pertains to the technical field of sewage treatment. Directed against the problem that the present oxidation ditch technique has unsatisfactory biological dephosphorization effect, the invention improves the traditional oxidation ditches so as to strengthen the dephosphorization capacity. Based on the traditional oxidation ditch treatment devices, an anaerobic tank and an anoxic tank A and an anoxic tank B are additionally provided, and a novel oxidation ditch technique that has the capability of denitrification and dephosphorization is developed. Characteristics and differences of phosphorus-accumulating bacteria, denitrifying bacteria and denitrification phosphorus removal bacteria are fully utilized so as to lead microorganisms of three kinds to occupy different ecological niches in three different selectors in one system, thereby realizing different functions respectively. By distributing reflux sludge and feeding water in a reasonable way, the invention relieves conflict between the phosphorus-accumulating bacteria and the denitrifying bacteria, and the competitive edge of the denitrifying bacteria is enhanced during competition, thus realizing high efficiency of denitrification and dephosphorization. The invention has the advantages of high dephosphorization efficiency, relatively stable operation, sludge bulking resistance, etc.

Description

technical field [0001] The invention relates to an anaerobic-anoxic oxidation ditch process denitrification and phosphorus removal device and a method thereof, and relates to the technical field of biological nitrogen and phosphorus removal of domestic sewage. Background technique [0002] Oxidation ditch technology [0003] Oxidation ditch, also known as continuous loop reactor, is a variant of the activated sludge process. Oxidation ditch was originally used in the Netherlands and has now become an important sewage treatment technology. In recent years, the rate of adoption of oxidation ditch treatment plants has made astonishing progress. At present, the number of sewage treatment plants with oxidation ditch process in my country is growing more rapidly. The oxidation ditch process has stable operation, convenient operation and maintenance, and excellent effluent quality. The improved oxidation ditch process in recent years has good denitrification and phosphorus remo...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 王淑莹侯红勋彭永臻殷芳芳
Owner 中山公用水务投资有限公司
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