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A two-stage plug-flow anaerobic-facultative-aerobic reaction tank and its method for treating sewage

An aerobic reaction tank and push-flow technology, which is applied in the field of biological wastewater treatment, can solve the problems of insufficient treatment capacity, low treatment efficiency, long transportation pipelines, etc., to achieve short-range nitrification and denitrification, improve treatment effect, Energy saving effect

Active Publication Date: 2016-07-06
SHENYANG RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used anaerobic-facultative-aerobic-aerobic process separates the three sections, but the internal circulation between each section during the denitrification and phosphorus removal of this tank requires a long pipeline and high energy consumption. Each section of the existing anaerobic-facultative-aerobic process is completely mixed, and the wastewater enters the bottom of the reaction tank, and is fully mixed with the mixed solution of the whole tank under the lifting and stirring action of the surface aerator, so the water quality of the whole tank is improved. It is basically uniform, cannot fully utilize the processing capacity, and the processing efficiency is relatively low

Method used

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  • A two-stage plug-flow anaerobic-facultative-aerobic reaction tank and its method for treating sewage
  • A two-stage plug-flow anaerobic-facultative-aerobic reaction tank and its method for treating sewage

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Effect test

Embodiment 1

[0025] The aerobic sludge from the secondary settling tank of the sewage treatment plant is added according to 50-60% of the respective volumes of the anaerobic zone, facultative zone and aerobic zone. Among them, specifically in the initial stage of sludge cultivation, a small amount of production wastewater is introduced, and the influent volume does not exceed 20% of the pre-acclimation treatment capacity. At the same time, add fresh water, feces water, etc. After achieving better treatment, the dosage of production wastewater can be increased by no more than 10-20% each time, and the increase in production wastewater can be continued after the microorganisms have adapted and consolidated. Simultaneously monitor the effluent CODcr concentration and other indicators, and observe the properties of the mixed liquid sludge And carry out the biophase microscopy of the sludge. The biophase is good, indicating that the sludge domestication is completed, and the wastewater can be ...

Embodiment 2

[0029]COD800mg / L, ammonia nitrogen 150mg / L, total phosphorus 40mg / L wastewater is treated by two-stage plug-flow anaerobic-facultative-aerobic process. First, the wastewater is introduced into the central anaerobic zone through the wastewater inlet pipe in the upper part of the anaerobic zone. Under the action of the liquid propeller, the wastewater is quickly mixed and homogenized. The anaerobic facultative fermentation bacteria in this section convert the organic matter in the wastewater into fermentation products, and at the same time provide the limited carbon source to the phosphorus accumulating bacteria first, which is beneficial to improve the removal efficiency of the system. Phosphorus effect, the wastewater stays in the anaerobic zone for 2.5 hours and then enters the anaerobic zone through the pre-buried port. By controlling the residence time and dissolved oxygen in the oxygen zone, it can effectively realize the short-range nitrification and denitrification reacti...

Embodiment 3

[0032] The wastewater with COD of 1000mg / L, ammonia nitrogen of 200mg / L, and total phosphorus of 40mg / L is treated by two-stage plug-flow anaerobic-facultative-aerobic process. In the oxygen zone, the wastewater is quickly mixed and homogenized under the action of the liquid propeller. In this zone, the anaerobic facultative fermentation bacteria convert the organic matter in the wastewater into fermentation products, and at the same time provide the limited carbon source to the phosphorus-accumulating bacteria first, which is beneficial to improve For the phosphorus removal effect of the system, the wastewater stays in the anaerobic zone for 2.5 hours and then enters the anaerobic zone through the pre-buried port. The wastewater is pushed around under the action of the rectifying wall and its own gravity. It can effectively realize the short-range nitrification and denitrification reaction of nitrate and biodegradable organic matter in the wastewater brought by the reflux of t...

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Abstract

The invention belongs to the technical field of waste water biological treatment and particularly relates to a two-section propelling type anaerobic-facultative-aerobiotic reaction pool and a sewage treatment method thereof. An anaerobic zone, a facultative zone and an aerobiotic zone are sequentially arranged on the reaction pool from the inner part to the outer part, a waste-water-in pipe is arranged at the top of the anaerobic zone of the reaction pool, and a water-out pipe is arranged at the top of the aerobiotic zone of the reaction pool. A plurality of micro-porous aerators are arranged on the bottoms of both the facultative zone and the aerobiotic zone. Diversion walls are respectively arranged between the anaerobic zone and the facultative zone, and between the facultative zone and the aerobiotic zone along the radial direction, an anaerobic zone preset opening and a return pump are respectively arranged at the two sides of the diversion wall between the anaerobic zone and facultative zone, and a facultative zone preset opening and a return pump are respectively arranged on the two sides of the diversion wall between the facultative zone and the aerobiotic zone. A liquid propeller is arranged in the anaerobic zone. Due to the arrangement of the diversion wall between the facultative zone and the aerobiotic zone, waste water can run in a way of being propelled by self gravity, energy consumption can be effectively saved, and the treatment effect can be effectively improved. The defects in the prior art are overcome, and a technology which has the advantages of simplicity, low energy consumption and great treatment effect is provided.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and in particular relates to a two-stage push-flow anaerobic-facultative-aerobic reaction pool and a method for treating sewage. Background technique [0002] Anaerobic-facultative-aerobic-aerobic process is a commonly used sewage treatment process. The anaerobic-facultative-aerobic process can effectively remove nitrogen and phosphorus pollution in sewage while removing organic carbon pollution (BOD) , has opened up a new way for sewage reuse and resource utilization. Compared with the secondary treatment of ordinary activated sludge and then the tertiary physical and chemical treatment, it not only has low investment and operation costs, but also does not have a large amount of difficult-to-treat chemical sludge. , with good environmental and economic benefits. The commonly used anaerobic-facultative-aerobic-aerobic process separates the three sections, but the internal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 周宁宇秉勇张源李利敏张宇许淑娟
Owner SHENYANG RES INST OF CHEM IND