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Magnetic carrier containing sewage treatment device and sewage treatment method

A technology for sewage treatment equipment and sewage treatment methods, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problems of easy clogging, accumulation, uneven distribution of air intake, etc. problems, to achieve the effect of low operating costs, convenient maintenance, and reduced infrastructure investment

Inactive Publication Date: 2011-11-23
YIXING ZHONGBEI KEDA ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the MBBR process also has its disadvantages, such as the uneven distribution of the intake air in the pool, which leads to the accumulation of local fillers, and the grids that intercept the fillers at the water outlet are easy to block, etc.

Method used

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  • Magnetic carrier containing sewage treatment device and sewage treatment method
  • Magnetic carrier containing sewage treatment device and sewage treatment method
  • Magnetic carrier containing sewage treatment device and sewage treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] In a sewage treatment plant, Orbal oxidation ditch is used to treat urban sewage. The average influent COD is 563mg / L, and the influent NH 4 + -N average is 26.3mg / L, the density is 1.0g / cm 3 , The magnetic carrier with a particle size of 0.076-0.16mm was added to the oxidation ditch mixture at 10g / L. After a period of stable operation, the average effluent COD reached 41.7mg / L, the removal rate was 92.6%, and the effluent NH 4 + The average -N reached 0.82mg / L, and the removal rate was 96.9%.

Embodiment 2

[0057] In a sewage treatment plant, Carrousel 2000 oxidation ditch was used to treat urban sewage. The average influent COD was 461mg / L, and the influent BOD 5 Average is 135mg / L, influent NH 4 + -N average is 24.9mg / L, the density is 1.1g / cm 3 , The magnetic carrier with a particle size of 0.076-0.16mm is added to the oxidation ditch mixture at 5g / L. After a period of stable operation, the average COD of the effluent reaches 44.9mg / L, the removal rate is 90.3%, and the BOD of the effluent is 90.3%. 5 The average reached 8.07mg / L, the removal rate was 94.0%, and the effluent NH 4 + The average -N reached 0.91mg / L, and the removal rate was 96.3%.

Embodiment 3

[0059] In a sewage treatment plant, the SBR process was used to treat the brewing wastewater. The average influent COD was 2700mg / L, and the influent BOD 5 The average is 2000mg / L, and the average influent SS is 310mg / L. The wastewater enters the SBR reaction tank after passing through the first-level enhanced sewage treatment process such as fine grids and fiber filters. The density will be 1.1g / cm 3 , The magnetic carrier with a particle size of 0.076-0.16mm is added to the SBR tank mixture at 5g / L. After a period of stable operation, the average COD of the effluent reaches 89.9mg / L, the removal rate is 96.7%, and the BOD of the effluent is 96.7%. 5 The average reached 26.7mg / L, the removal rate was 98.7%, the average SS in the effluent reached 24.1mg / L, and the removal rate was 92.2%.

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Abstract

The invention discloses a sewage treatment device which comprises a biochemical reaction tank, a magnetic separator, a sludge dewatering apparatus and a demoulding apparatus, wherein the magnetic separator is used for separating sludge from magnetic carriers. The invention also discloses a sewage treatment method for biofilm oxidation ditches, which is implemented by using the sewage treatment device; the sewage treatment method sequentially comprises a sewage treatment step and a sludge treatment step; and the sewage treatment method is characterized in that the magnetic carriers are added into the biochemical reaction tank; and in the sludge treatment step, at least a part of the sludge passes through the magnetic separator.

Description

technical field [0001] The invention relates to a sewage treatment equipment, in particular to a sewage treatment equipment added with a magnetic carrier. The invention also relates to a method for treating sewage using the device. Background technique [0002] Activated sludge process and biofilm process are two major types of processes for biological wastewater treatment. The activated sludge process has the advantages of large processing capacity, high efficiency and good effluent quality. Its various deformation processes have good denitrification and phosphorus removal performance, and it has been the most widely used in urban sewage treatment plants. The disadvantage is that the operation is not stable enough, it is easy to produce sludge bulking and the sludge output is large, and its treatment effect on low-concentration sewage is poor. The biofilm process has the advantages of stable operation, less excess sludge, simple management, strong removal of ammonia nitro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 王化军何秋慧张扬付雷王珊龙能李博王禹丹
Owner YIXING ZHONGBEI KEDA ENVIRONMENT TECH
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