A Flow Distribution Method for Enhanced Nitrogen Removal by Staged Inlet A/O Biofilm Process

A segmented water intake and flow distribution technology, applied in flow control, aerobic and anaerobic process treatment, non-electric variable control, etc., can solve problems such as incomplete application

Active Publication Date: 2015-08-05
BEIJING UNIV OF TECH
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Problems solved by technology

[0005] For the biofilm method, the above equal load flow distribution method is not fully applicable

Method used

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  • A Flow Distribution Method for Enhanced Nitrogen Removal by Staged Inlet A/O Biofilm Process
  • A Flow Distribution Method for Enhanced Nitrogen Removal by Staged Inlet A/O Biofilm Process
  • A Flow Distribution Method for Enhanced Nitrogen Removal by Staged Inlet A/O Biofilm Process

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Embodiment example

[0026] Implementation case: Taking the three-stage A / O process of segmental inflow as the research object to carry out flow distribution, and investigate its treatment effect on domestic sewage in a family area of ​​a university. Experimental results show that the present invention has strong practicability, is easy to popularize, and can realize high-efficiency and low-consumption treatment of municipal sewage.

[0027] The three-stage A / O process of segmented water inflow is anoxic zone A1, aerobic zone O1, anoxic zone A2, aerobic zone O2, anoxic zone A3, and aerobic zone O3, which are 30L, 60L, 30L, 60L, 40L, 50L. All anoxic and aerobic areas are filled with suspended floating ball fillers, and the interior of the suspended floating balls is filled with three-dimensional sponges and Pall rings. The ratio of the two is 2:1, and the filling ratio is controlled between 70% and 80%. The filling rate of drift balls in the anoxic zone A1, A2 and A3 is controlled between 80% and ...

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Abstract

The invention discloses a flow distribution method for enhancing nitrogen removal by using a step-feed A / O biological membrane and belongs to the field of wastewater treatment technologies. The method comprises the following steps: controlling F / (RhoV) values of aerobic zones to be equal and determining a proportional relation between water inlet flow of all points, in which F refers to water inlet loads of the aerobic zones and comprises a superior-level carrying load and a current-level water inlet load, Rho refers to filler packing rates of the aerobic zones and V refers to volumes of the aerobic zones; deducing a water outlet reflux ratio through a water outlet ideal water quality requirement on the basis of determining the proportional relation between water inlet flow of all points, and subsequently obtaining a proportional relation between water inlet flow and the water outlet reflux ratio of all points; comparing by arranging a plurality of groups of experiments according to the proportional relation between water inlet flow and the water outlet reflux ratio of all points, and determining a best zone of a total HRT (Hydraulic Retention Time). The flow distribution method is capable of improving the removal rate of the total nitrogen and enabling the removal rate of the total nitrogen to reach about 80%, has the advantages of strong practicability and easy popularization and is capable of treating municipal administration wastewater with low C / N (Carbon / Nitrogen) with high efficiency and low consumption.

Description

technical field [0001] The present invention relates to a flow distribution method for enhanced denitrification by segmented water inflow A / O biofilm process. Using the flow distribution method in the present invention can better solve the problem of insufficient carbon source in municipal sewage and improve the removal rate of total nitrogen. It belongs to the technical field of sewage treatment. Background technique [0002] In recent years, with the rapid development of urbanization in my country, the requirements for municipal sewage treatment have become higher and higher. For this reason, the country has introduced more stringent urban sewage treatment standards. Many urban sewage in my country are typical low C / N sewage. In many cases, the carbon source provided by the low carbon-to-nitrogen ratio sewage itself can no longer meet the requirements of simultaneous and efficient denitrification. [0003] The staged water inflow A / O biological denitrification process is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30G05D7/00
Inventor 李军卞伟王盟丁岩郑照明张美雪
Owner BEIJING UNIV OF TECH
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