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Method and apparatus for swirling flow strengthened biodegradation treatment of sewage

A biodegradation and sewage technology, applied in the field of water treatment, can solve the problems of low sewage treatment efficiency and poor economy, and achieve the effects of improving nutrient removal rate, biodegradability, and denitrification rate

Inactive Publication Date: 2018-08-17
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low efficiency and poor economic efficiency of the biodegradation method in the prior art, and provide a method and device for swirling enhanced biodegradation treatment of sewage

Method used

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  • Method and apparatus for swirling flow strengthened biodegradation treatment of sewage
  • Method and apparatus for swirling flow strengthened biodegradation treatment of sewage
  • Method and apparatus for swirling flow strengthened biodegradation treatment of sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0075] a. The mixture of sewage and activated sludge (the volume ratio of sewage and activated sludge is 300:1) is subjected to anoxic treatment in anoxic tank 1 (time is 2 hours, DO concentration is 0.5mg / L);

[0076] b. Carry out aerobic treatment (time is 6 hours, DO concentration is 2mg / L) in aerobic tank 2 with the mixture obtained after anoxic treatment, obtain mixed material A;

[0077] c. Part of the mixed material A enters the sludge breaking cyclone 4 (pressure drop is 0.1MPa) through the circulating reflux pump 3 for cyclone breaking treatment, and the overflow of the sludge breaking cyclone 4 The reflux ratio is 4% by volume, the DO concentration in the material obtained after the cyclone breaking treatment is 1 mg / L, and the median particle diameter of the activated sludge in the material is 46.23 μm. After the cyclone breaking treatment The material returned in the anoxic tank 1, the circulation reflux ratio of the reflux process in the cycle is 5; the mixed mate...

Embodiment 2

[0079] a. The mixture of sewage and activated sludge (the volume ratio of sewage and activated sludge is 100:1) is subjected to anoxic treatment in anoxic tank 1 (time is 3 hours, DO concentration is 0.1mg / L);

[0080] b. Carry out aerobic treatment (time is 5 hours, DO concentration is 3mg / L) in aerobic tank 2 with the mixture obtained after anoxic treatment, obtain mixed material A;

[0081] c. Part of the mixed material A enters the sludge breaking cyclone 4 (pressure drop is 0.1MPa) through the circulating reflux pump 3 for cyclone breaking treatment, and the overflow of the sludge breaking cyclone 4 The reflux ratio is 4% by volume, the DO concentration in the material obtained after the cyclone breaking treatment is 0.8 mg / L, and the median particle size of the activated sludge in the material is 25 μm. After the cyclone breaking treatment The material returned in the anoxic tank 1, the circulation reflux ratio of the reflux process in this cycle is 10; the mixed material ...

Embodiment 3

[0083] a. The mixture of sewage and activated sludge (the volume ratio of sewage and activated sludge is 500:1) is subjected to anoxic treatment in anoxic tank 1 (time is 1 hour, DO concentration is 0.6mg / L);

[0084] b. Carry out aerobic treatment (time is 9 hours, DO concentration is 4mg / L) in aerobic tank 2 with the mixture obtained after anoxic treatment, obtain mixed material A;

[0085] c. Part of the mixed material A enters the sludge breaking cyclone 4 (pressure drop is 0.1MPa) through the circulating reflux pump 3 for cyclone breaking treatment, and the overflow of the sludge breaking cyclone 4 The reflux ratio is 3% by volume, the DO concentration in the material obtained after the cyclone breaking treatment is 0.9 mg / L, and the median particle diameter of the activated sludge in the material is 60 μm. After the cyclone breaking treatment The material returned in the anoxic tank 1, the circulation reflux ratio of the reflux process in the cycle is 2; the mixed materi...

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Abstract

The invention relates to the field of water treatment, and discloses a method and an apparatus for swirling flow strengthened biodegradation treatment of sewage. The method comprises: a, under an anoxic treatment condition, carrying out anoxic treatment on sewage and an active-sludge-containing material in an anoxic pool; b, carrying out aerobic treatment on the mixture obtained through the anoxictreatment in an aerobic pool to obtain a mixture A; and c, carrying out swirling flow breaking treatment on the part of the mixture A, returning the treated material to the anoxic pool, carrying outsolid-liquid separation on the remaining mixture A to separate the active sludge, sequentially carrying out swirling flow breaking treatment and hydrolysis acidification treatment on the at least partially separated active sewage, and returning the supernatant obtained through the hydrolysis acidification treatment to the anoxic pool. According to the present invention, with the method, the totalnitrogen removal effect in the biochemical process can be effectively improved, and the resource utilization of the sludge can be improved.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method and device for swirl-enhanced biodegradation treatment of sewage. Background technique [0002] The traditional activated sludge method occupies a pivotal position in the sewage treatment industry, and the current application rate in the sewage treatment industry exceeds 90%. With its advantages of high decontamination efficiency, simple operation and low cost, the activated sludge method will also dominate the future sewage treatment. However, with the increasing environmental protection standards, the decontamination efficiency of activated sludge method needs to be further improved. Taking the anoxic / aerobic process (A / O) as an example, the A / O method has defects such as high reflux dissolved oxygen concentration (DO) and sludge activity that needs to be improved urgently. A low-consumption and simple method is adopted to realize the improvement of the A / O method It i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F9/14C02F11/00C02F103/36
CPCC02F3/12C02F3/1221C02F3/28C02F3/30C02F9/00C02F11/00C02F2001/007C02F2103/365C02F2301/043
Inventor 俞惠庆黄平陈燕斌江萍周岚虞碧川高根煜汪华林刘毅沈其松
Owner CHINA PETROLEUM & CHEM CORP
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