A/A/O system for synchronously strengthening biochemical phosphorus removal based on powdery lanthanum-based adsorbent

A biochemical and adsorbent technology, applied in the field of A/A/O system, can solve the problems of chemical phosphorus removal with a large amount of excess sludge, total phosphorus in the effluent is not up to the standard, etc., achieve good chemical adsorption, stable water quality indicators, and promote growth Effect

Active Publication Date: 2020-11-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problems in the traditional biological denitrification and phosphorus removal A / A / O process that the effluent total phosphorus is not up to the standard, and chemical phosphorus removal produces a large amount of excess sludge, etc., and provides a synchronously enhanced biological A / A / O system for chemical phosphorus removal

Method used

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  • A/A/O system for synchronously strengthening biochemical phosphorus removal based on powdery lanthanum-based adsorbent
  • A/A/O system for synchronously strengthening biochemical phosphorus removal based on powdery lanthanum-based adsorbent
  • A/A/O system for synchronously strengthening biochemical phosphorus removal based on powdery lanthanum-based adsorbent

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specific Embodiment approach 1

[0023] Specific Embodiment 1: In this embodiment, an A / A / O system based on a powdered lanthanum-based adsorbent for synchronously enhanced biochemical phosphorus removal includes sequentially connected anaerobic pools, anoxic pools, aerobic pool groups, and sedimentation pool, the aerobic pool group includes No. 1 aerobic pool, No. 2 aerobic pool, No. 3 aerobic pool and No. 4 aerobic pool; There are agitators in the pool, No. 2 aerobic pool, No. 3 aerobic pool and No. 4 aerobic pool; the No. 1 aerobic pool, No. 2 aerobic pool, No. 3 aerobic pool and No. The bottom of the tank is equipped with a disc-type microporous aeration head; the disc-type micro-porous aeration head is connected to an air compressor, and an electromagnetic flowmeter is used to control the aeration amount; a part of the mud-water mixture at the outlet of the No. 4 aerobic tank It flows into the sedimentation tank, and the other part is returned to the anoxic tank through the nitrification mixed return pipe...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment differs from Embodiment 1 in that: the total hydraulic retention time of the anaerobic pool, the anoxic pool and the aerobic pool group is 8-12 hours. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the reflux ratio of the nitrification liquid in the nitrification mixing return pipe is 135%-200%. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses an A/A/O system for synchronously strengthening biochemical phosphorus removal based on a powdery lanthanum-based adsorbent. The invention belongs to the field of sewage treatment, and particularly relates to an A/A/O system for synchronously strengthening biochemical phosphorus removal based on a powdery lanthanum-based adsorbent. The invention aims to solve the problems that the effluent total phosphorus in the traditional biological nitrogen and phosphorus removal A/A/O (Anaerobic/Anaerobic/Anoxic/Oxic) process does not reach the standard, a large amount of residualsludge is generated by chemical phosphorus removal and the like. The system comprises an anaerobic tank, an anoxic tank, an aerobic tank group and a sedimentation tank which are connected in sequence,and a lanthanum-based adsorbent is added at the tail end of the aerobic tank to form a synchronous enhanced biochemical phosphorus removal system. The adsorbent not only can play a role in chemicallyadsorbing phosphate, but also has a strengthening effect on activated sludge in the reactor, so that the formation of EPS is strengthened, and the growth of phosphorus-accumulating bacteria is also strengthened. The system is used for sewage treatment.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an A / A / O system for synchronously strengthening biochemical phosphorus removal based on a powdered lanthanum-based adsorbent. Background technique [0002] There are a lot of nutrients such as organic matter, nitrogen and phosphorus in municipal sewage and domestic sewage. Phosphorus, as a key factor leading to water eutrophication, cannot be ignored in the process of urban sewage treatment. As the most economical and effective method, biological phosphorus removal has been widely used in sewage plants. Biological phosphorus removal mainly utilizes phosphorus accumulating bacteria to release phosphorus under anaerobic conditions, absorb phosphorus excessively under aerobic conditions, and discharge excess sludge to achieve phosphorus removal. [0003] As a traditional biological nitrogen and phosphorus removal process, the A / A / O process has advantages that other proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/12C02F3/28C02F3/02C02F101/10
CPCC02F3/30C02F3/308C02F3/302C02F3/286C02F3/121C02F3/1236C02F3/02C02F3/1215C02F2001/007C02F2101/105Y02W10/10
Inventor 南军刘博涵
Owner HARBIN INST OF TECH
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