Sewage treatment method for bottom aeration oxidation ditch in cold region

A sewage treatment system and oxidation ditch technology, which is applied in the direction of aerobic and anaerobic process treatment, can solve the problems of affecting the sewage treatment effect, excessive oxygenation, and lower water temperature, so as to improve the efficiency of sewage treatment, strengthen the comprehensive performance, and prevent The effect of water temperature reduction

Inactive Publication Date: 2011-09-28
JILIN JIANZHU UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0003] As the aeration equipment of the oxidation ditch process, mechanical aeration equipment is often used. At this time, the mechanical aeration equipment plays the role of oxygenation and push flow, and it is difficult to independently control the oxygenation amount and flow rate in actual operation.
Especially when the requirements for phosphorus and nitrogen removal are high, it is necessary to maintain a certain volume of anaerobic section in the reaction tank, but the mechanical aeration equipment needs a certain f

Method used

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Examples

Experimental program
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Example Embodiment

[0011] 1. In order to ensure a certain flow rate of the water in the bottom oxidation ditch, when installing an underwater impeller propulsion device and a microporous aeration plate in the bottom oxidation ditch, the power should be determined according to the resistance of the water flow in the ditch. Excessive power will increase operating power consumption Otherwise, it will not have the effect of advancing the water flow, and attention should be paid to match the bottom microporous aeration plate, otherwise it will affect the water flow advancement and aeration effect in the oxidation ditch during the start-up period.

[0012] 2. The position and height of the reasonable underwater impeller propulsion device of the bottom aeration oxidation ditch system should be determined in combination with the bottom oxidation ditch inlet water flow rate, the return sludge flow rate, and the aeration effect of the bottom microporous aeration system.

[0013] 3. Appropriately install an unde...

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PUM

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Abstract

The invention relates to a sewage treatment method for a bottom aeration oxidation ditch in a cold region, and belongs to the technical field of sewage treatment in the environmental engineering discipline. On the basis of a series of experimental studies, when an oxidation ditch sewage treatment system is adopted in a severe cold region, a bottom aeration oxidation ditch system is adopted according to the characteristic of the cold region, and aeration equipment is formed by combining an underwater impeller propulsion device and a micropore aeration plate; meanwhile, a technical method in which the bottom aeration oxidation ditch system can be operated in an alternate composite anoxic/aerobic mode is constructed according to the aerobic/anoxic and pulsation inertia effect theory of biological sewage treatment to enhance treatment capacity and exert the maximum performance of the oxidation ditch treatment system. The method has the advantages of preventing the water temperature from being reduced, ensuring stable operation in winter and improving sewage treatment efficiency and the comprehensive water quality of effluent.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment in the discipline of environmental engineering, and in particular relates to a sewage treatment method for bottom aeration oxidation ditch in cold regions. Background technique [0002] The oxidation ditch sewage treatment process was successfully developed by the Dutch Institute of Sanitary Engineering in the 1950s. Since it was first put into use in the Netherlands in 1954, it has been widely used in the treatment of domestic and industrial sewage at home and abroad due to its technical characteristics such as good effluent quality, stable operation, and convenient management. Currently widely used oxidation ditch types include: Pasveer oxidation ditch, Carrousel oxidation ditch, Orbal oxidation ditch, T-type oxidation ditch (three-ditch oxidation ditch) , DE type oxidation ditch and integrated oxidation ditch, etc. Due to the differences in structure and operation, these oxidation di...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 尹军王萧萧张居奎赵可王建辉
Owner JILIN JIANZHU UNIVERSITY
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