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Sludge backflow system based on control of sludge age

A sludge age and activated sludge technology, which is applied in the field of activated sludge return system, can solve the problems that the sludge age cannot be guaranteed to be stable.

Active Publication Date: 2014-12-10
CEEP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

None of the above control strategies is based on sludge age control. Therefore, when environmental factors such as influent flow, pollutant concentration, and temperature change, it cannot be guaranteed or requires extremely complicated control procedures to ensure that the sewage treatment system Stabilization of sludge age

Method used

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  • Sludge backflow system based on control of sludge age

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Embodiment Construction

[0009] See figure 1 , an activated sludge return system based on sludge age control, including a mixed liquid separation device, a mixed liquid separation device I, and a mixed liquid separation device II. The mixed liquid diversion device can be, but not limited to, an overflow weir; the mixed liquid separation device I and the mixed liquid separation device II can be, but not limited to, a secondary settling tank, an air flotation tank, a membrane separation tank, etc.

[0010] Principle of use of the present invention:

[0011] In order to obtain a stable and artificially controlled sludge age (SRT), the effluent from the biological reaction tank (the volume of the reaction tank is denoted as V) is divided into two paths through the mixed liquid diversion device, and the first mixed liquid (the flow rate is denoted as Q 1 ) into the mixed liquid separation device I, the second mixed liquid (the flow rate is denoted as Q 2 ) into the mixed liquid separation device II, and ...

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Abstract

The invention relates to a sludge backflow system based on control of a sludge age. The sludge backflow system comprises a mixed liquid flow-division device, a mixed liquid separation device I and a mixed liquid separation device II, wherein the mixed liquid flow-division device can be used for carrying out flow division on total mixed liquid according to the artificial set values; the mixed liquid separation device I is used for carrying out solid-liquid separation on the mixed liquid entering the mixed liquid separation device I and completely flowing activated sludge back to a biological reaction tank; and the mixed liquid separation device II is used for carrying out solid-liquid separation on the mixed liquid entering the mixed liquid separation device II and completely discharging the activated sludge. By virtue of the sludge backflow system, the sludge age in a sewage biological treatment system can be simply and conveniently controlled and maintained to be stable.

Description

technical field [0001] The invention relates to the field of sewage biological treatment, in particular to an activated sludge return system based on sludge age control. Background technique [0002] With the mandatory improvement of the discharge requirements of urban sewage treatment plants at the national policy level, most of the urban sewage treatment plants in my country are currently facing the problem of upgrading and upgrading to grade A. Among them, how to strengthen the secondary biochemical system to remove total nitrogen and total phosphorus is even more difficult. [0003] The removal process of total nitrogen and total phosphorus by the biochemical system, especially the nitrification process, is strongly restricted by the sludge age of the biochemical system, and the adjustment of the sludge age is realized by the sludge return system. At present, the commonly used sludge return control strategies mainly include 1) keeping the sludge return flow constant; 2)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 王贤荣高占平古元君董俊
Owner CEEP CO LTD