Anaerobic-anoxic oxidation pitch technique denitrification dephosphorization device and method

A denitrification dephosphorization and oxidation ditch technology, applied in the field of biological denitrification and dephosphorization of domestic sewage, can solve the problems of low dephosphorization efficiency, achieve the goal of increasing the pH value, saving aeration energy consumption, and alleviating the contradictions of carbon source competition Effect

Active Publication Date: 2009-12-16
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 came 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 test stage are: COD is 232-621mg / L, NH 4 + 42.1~64.5mg / L, PO 4 3-5.2~9.1mg / L, TP 5.9~9.7mg / L, TN 56.4~73.5mg / L, pH 7.2~7.8. The analytical methods used in the test were all in accordance with the standard methods issued by the National Environmental Protection Agency.

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

specific Embodiment 2

[0035] The inoculum sludge came from the return sludge of Beijing Jiuxianqiao Sewage Treatment Plant, and the test water was taken from the municipal sewage 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- It is 3.4 / 8.6mg / L, TN is 52.4 / 68.3mg / L, and pH is 7.2 / 7.8. The analytical methods used in the test were all in accordance with the standard methods issued by the National Environmental Protection Agency.

[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 water inlet pump A2 and the water inlet pump B3, the water inlet ratio of the water inlet pumps A2 and B3 is 4:1, and start the backflow at the same time Sludge pumps A18 and B19, the flow ratio of return sludge pumps A18 and B19 is 1:3, through the continuous treatment of domestic sewage, the activated sludge has been domesticated and ...

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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 discloses an anaerobic-anoxic oxidation ditch process denitrification dephosphorization device and a method thereof, and relates to the technical field of biological denitrification and dephosphorization of domestic sewage. Background technique [0002] Oxidation ditch technology [0003] Oxidation ditch, also known as continuous loop reactor, is a variant of activated sludge process. Oxidation ditch was originally applied in the Netherlands and has become an important sewage treatment technology. The rate of adoption of oxidation ditch treatment plants has grown tremendously in recent years. At present, the number of sewage treatment plants in my country's oxidation ditch process is growing more rapidly. Oxidation ditch process runs stably, easy to operate and maintain, and the effluent quality is excellent. The oxidation ditch process improved in recent years has a good ability to remove nitrogen and phosphorus, making this process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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