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Multi-point water-inflow circulating A/O (Anaerobic/Oxic) sewage treatment system and treatment process thereof

The technology of a sewage treatment system and treatment process is applied in the field of multi-point water inlet circulation A/O sewage treatment system and its treatment process, which can solve the problems of increasing the number of reactor stages, and achieve the increase of the number of reactor stages and the convenience of operation and use. , the effect of reducing adverse effects

Active Publication Date: 2015-05-20
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a multi-point water inflow circulation A / O sewage treatment system and its treatment process, and the technical problem to be solved is to increase the cycle alternation between the anoxic section and the aerobic section without increasing the number of reactor stages , in order to achieve the same effect of increasing the number of reactor stages, realize short-cut nitrification and denitrification, and reduce the adverse effect of nitrification liquid on anaerobic phosphorus release, especially for high ammonia nitrogen wastewater, the denitrification rate is significantly improved

Method used

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  • Multi-point water-inflow circulating A/O (Anaerobic/Oxic) sewage treatment system and treatment process thereof
  • Multi-point water-inflow circulating A/O (Anaerobic/Oxic) sewage treatment system and treatment process thereof
  • Multi-point water-inflow circulating A/O (Anaerobic/Oxic) sewage treatment system and treatment process thereof

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Embodiment 1

[0034] In this embodiment, the multi-point water inflow circulation A / O sewage treatment system includes parallel four-stage reactors, and each stage reactor includes an anoxic pool and an aerobic pool connected in series, wherein the aerobic pools of adjacent stages The pools are connected to each other, and a return pipe is set between the anoxic pools of the same level and the bottom of the aerobic pools through a low-head return pump; the upper part of the anoxic pools at each level is equipped with sewage inlets, and the last level of aerobic pools The upper part of the pool is provided with a liquid outlet, and the lower part is provided with a vent.

Embodiment 2

[0036] In this embodiment, the multi-point water inflow circulation A / O sewage treatment system includes parallel four-stage reactors, and each stage reactor includes an anoxic pool and an aerobic pool connected in series, wherein the aerobic pools of adjacent stages The pools are connected to each other, and a return pipe is set between the anoxic pools of the same level and the bottom of the aerobic pool through a low head return pump, and the return line is provided with a flow control device; There are sewage inlets, and each sewage inlet is equipped with a flow control device; the upper part of the last aerobic pool is provided with a liquid outlet, and the lower part is provided with a vent port; the volume ratio between the anoxic pool and the aerobic pool of the same level is 1 :2.

Embodiment 3

[0038] The multi-point inflow cycle A / O sewage treatment process in this embodiment includes the following steps (refer to the system in Embodiment 1 or Embodiment 2):

[0039] (1) Pass the pretreated sewage into the anoxic pools at all levels for denitrification, and then the mixed solution enters the aerobic pools for nitrification.

[0040] (2) Part of the mixed liquid in the first-level aerobic tank is pumped back to the first-level anoxic tank through the low-head reflux pump, mixed with the newly introduced sewage for reaction, and then enters the first-level aerobic tank again;

[0041] (3) The mixed solution in the primary aerobic tank enters the secondary aerobic tank and mixes with the mixed solution in the secondary aerobic tank, and part of the mixed solution in the secondary aerobic tank is pumped back to the secondary aerobic tank through the low head return pump. In the first-level anoxic pool, it mixes with the newly introduced sewage to react and then enters t...

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Abstract

The invention belongs to the sewage treatment field, and in particular relates to a multi-point water-inflow circulating A / O (Anaerobic / Oxic) sewage treatment system and a treatment process thereof. The system comprises at least two stages of reactors which are in parallel connected, wherein each stage of the reactors comprises an anaerobic tank and an oxic tank which are in series connected; the anaerobic tanks of the adjacent stages are communicated; a reflux pipeline is additionally arranged between the anaerobic tank and bottom of the oxic tank of the same stage by a low waterhead reflux pump. The multi-point water-inflow circulating A / O sewage treatment system can be used for realizing multi-point water inflow between different A tanks and O tanks, and a set of sewage circulating systems is added between the A tanks and the O tanks, so that the sewage in the A tanks and the O tanks is circulated, i.e., the plurality of the A tanks and the O tanks are in series connected for effectively achieving the same effect of increasing the stage number of the reactors, and therefore, short-cut nitrification and denitrification is realized, the adverse effect of nitrification liquid for anaerobic phosphate release is lowered, and the denitrification rate is improved. The multi-point water-inflow circulating A / O sewage treatment system disclosed by the invention is simple in process, convenient to operate and use, convenient for daily repair and maintenance, good in denitrification effect for wastewater and the sewage, and easy to popularize and apply.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a multi-point water inlet circulation A / O sewage treatment system and a treatment process thereof. Background technique [0002] In recent years, the problem of water eutrophication has become increasingly serious, which has brought many harms to the natural environment and human life. At the same time, nitrogen and phosphorus discharge standards are becoming increasingly stringent. Many sewage plants are facing upgrading and renovation problems due to aging equipment and unstable treatment effects. [0003] Although there are many ways to remove nitrogen and phosphorus from sewage, it is generally believed that the activated sludge method (nitrification and denitrification) is the most economical and effective method for biological nitrogen and phosphorus removal in urban sewage. A / O is the abbreviation of Anoxic / Oxic. The traditional A / O process connects the front a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 何争光闫冬韩艳萍王荣张碧晰
Owner ZHENGZHOU UNIV
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