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Biological reinforcement technology of sewage treatment

A technology for sewage treatment and sewage treatment system, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. The effect of bulking, reducing SVI and increasing sludge concentration

Inactive Publication Date: 2014-01-15
ZHENGZHOU HANMING ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in MBBR, to solve the bottleneck of sludge granulation, to solve the problems of sludge bulking at low temperature, and the removal rate of ammonia nitrogen and total nitrogen greatly decreased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] Implementation plan 1: intermittently open the grit chamber

[0018] This scheme is applicable to the sewage treatment system without primary sedimentation tank.

[0019] Generally, the grit chamber can be opened once every 7 days to 30 days (the specific opening and stopping time can be determined by experiments, and the large particles that are easy to deposit due to the outflow of most small particles shall prevail), and the large particles accumulated in the pool shall be discharged. , the rest of the time the sewage still flows through the grit chamber, and the fine-grained inorganic matter enters the biological treatment system.

[0020] For the aerated grit chamber or the cyclone grit chamber, the aeration device of the aerated grit chamber can be operated intermittently, or the cyclone device of the cyclone chamber can be operated intermittently.

Embodiment approach 2

[0021] Embodiment 2: Hydraulic classification of the separated sand

[0022] The sand sucked out by the sand suction device enters the hydraulic classification device, the coarse sand is separated for the second time and then discharged out of the treatment system for sale, and the fine sand enters the biochemical treatment facility.

[0023] This scheme is applicable to both situations without primary sedimentation tank and with primary sedimentation tank.

Embodiment approach 3

[0024] Implementation plan three: set up two-stage series grit chamber

[0025] The sand particles in the primary grit chamber are directly discharged, and the fine sand in the secondary grit chamber is discharged into the biochemical treatment system by bypassing the primary grit chamber. This scheme is applicable to the situation without primary sedimentation tank.

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Abstract

The invention belongs to the field of sewage treatment of the environmental protection. Inorganic particles carried in sewage are sent to a biological treatment system, the particles become a natural biological filler, microbes will be attached onto the filler and grow, and nitrobacteria can be easily proliferated on the filler, so it is in favor of removing ammonia nitrogen and easily realizing synchronous nitrification-denitrification because of the existence of an anoxic zone in deepest part of a biomembrane. The coexistence of the particles and flocculent sludge substantially reduces the sludge index of the biological system and is helpful for improving the sludge concentration and reinforcing the treatment effect. A technology disclosed in the invention is especially suitable for reinforcing the ammonia nitrogen and total nitrogen treatment effects at a low temperature.

Description

1. Technical field [0001] The invention belongs to the field of sewage treatment in the field of environmental protection. 2. Background technology [0002] In recent years, MBBR (Moving Bed Biofilm Reactor) technology has developed rapidly and is mainly used to enhance the biological treatment effect of existing sewage treatment projects, especially in the removal of ammonia nitrogen and total nitrogen. [0003] The principle is to use the biofilm attached to the surface of the particles to enhance the biological treatment effect. However, MBBR cannot reduce the sludge index of the biological treatment system, and its filler cost is expensive, which limits the application of MBBR. [0004] At the same time, the technical research on aerobic granular sludge is also becoming more and more perfect. The common features of MBBR and aerobic granular sludge are rich biological phase and high sludge concentration. Aerobic granular sludge is more characterized by high settling vel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 张书良
Owner ZHENGZHOU HANMING ENVIRONMENTAL ENG
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