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Drop oxygen enrichment type micro-aerobic-sludge-bed process and wastewater treatment method thereof

A technology of sludge bed and oxygen-enriched water, which is applied in water/sludge/sewage treatment, aerobic and anaerobic process treatment, biological water/sewage treatment, etc. Large investment and other issues, to achieve good physical and chemical structure and settlement performance, low processing cost, low investment effect

Active Publication Date: 2017-05-10
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the existing problems that the treatment technology for low C / N ratio and general C / N ratio wastewater is not perfect enough, and there are problems such as complex process, large investment in infrastructure, high energy consumption, high treatment cost, etc. Microaerobic sludge bed process and its wastewater treatment method

Method used

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  • Drop oxygen enrichment type micro-aerobic-sludge-bed process and wastewater treatment method thereof
  • Drop oxygen enrichment type micro-aerobic-sludge-bed process and wastewater treatment method thereof

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specific Embodiment approach

[0023] combine figure 1 and 2 This embodiment will be described. The drop-water oxygen-enriched micro-oxygen sludge bed process in this embodiment is composed of a micro-oxygen sludge bed 1, a filler 2, a water-dropping drainage tank 3, an oxygen-enriched mud water return tank 4, an oxygen-enriched mud water return pipe 5, a return flow Pump 6, check valve 7, micro-oxygen sludge bed inlet pipe 8, sedimentation tank 9, sedimentation tank outlet pipe 10 and excess sludge discharge pipe 11; the micro-oxygen sludge bed 1, filler 2, water drop drainage The tank 3, the oxygen-enriched mud water return tank 4, the oxygen-enriched mud water return pipe 5, the return pump 6, the check valve 7, and the micro-oxygen sludge bed water inlet pipe 8 constitute a processing unit; the processing unit is placed in the sedimentation tank 9, One or more treatment units can be set in the same sedimentation tank 9; the micro-aerobic sludge bed 1 is arranged in a vertical column shape with an open ...

Embodiment 1

[0029] Example 1: Combining figure 1 Illustrate this embodiment. The specific method of using the device described in the specific embodiment to treat low C / N ratio wastewater in this embodiment is as follows:

[0030]Wastewater with low C / N ratio enters it from the bottom of the microaerobic sludge bed 1 through the inlet pipe 8 of the microaerobic sludge bed, and the pollutants in the wastewater are treated by the microaerobic bacteria in the filler 2 layer. The falling water drainage tank 3 at the top of the sludge bed 1 naturally falls to the oxygen-enriched mud water return tank 4 to realize the oxygen-enriching process. The mud bed 1 provides oxygen for the micro-aerobic bacteria group in it, the reflux ratio is 20:1, and the hydraulic retention time is 15h; the excess oxygen-enriched wastewater overflows into the sedimentation tank 9, and then overflows through the sedimentation tank 9, and the sedimentation tank The water outlet pipe 10 is discharged to obtain qualifi...

Embodiment 2

[0034] Example 2: Combining figure 1 Illustrate this embodiment. The specific method of using the device described in the specific embodiment to treat the general C / N ratio wastewater in this embodiment is as follows:

[0035] Generally, wastewater with a C / N ratio enters it from the bottom of the microaerobic sludge bed 1 through the inlet pipe 8 of the microaerobic sludge bed, and the pollutants in the wastewater are treated by the microaerophilic flora in the second layer of the filler. The falling water drainage tank 3 at the top of the sludge bed 1 naturally falls to the oxygen-enriched water return tank 4 to realize the oxygen-enriching process. The mud bed 1 provides oxygen for the micro-aerobic bacteria in it, the reflux ratio is 30:1, and the hydraulic retention time is 12h; the excess oxygen-enriched wastewater overflows into the sedimentation tank 9, and then overflows through the sedimentation tank 9, and the sedimentation tank The water outlet pipe 10 is discharg...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a micro-aerobic biological treatment process and a method thereof for treating sewage. The micro-aerobic biological treatment process and the method thereof for treating the sewage aim at solving the problems that an existing wastewater treatment technique is not complete enough, high in energy consumption, high in running expense and complicated in process, and the like. In the process, a micro-aerobic sludge bed, a filling material, a drop flow guiding groove, an oxygen-enriched water refluxing tank, a refluxing pipe, a refluxing pump, a check valve, a water inlet pipe, a settling tank, a water outlet pipe and a residual sludge discharging pipe are provided. According to the method, a micro-aerobic environment is beneficial to the mutualism among an aerobic bacterium, an anaerobic bacterium and a facultative anaerobic bacterium; these cultures metabolize a pollutant in a synergistic manner; additionally, as oxygen participates in a biochemical reaction, the oxidizing action and the reducing action in a system can occur at the same time; the anaerobic respiration, the aerobic respiration, the nitrification and the denitrification are enabled to coexist in a treatment system; the system is subjected to oxygen enrichment by a drop procedure, so as to maintain an oxygen source in the sludge bed. The process and the method are compact in layout, and have a favorable application prospect in aspects of treating wastewater; the running space and the running expense are saved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a water-dropping oxygen-enriched micro-oxygen sludge bed process and a wastewater treatment method thereof. Background technique [0002] Most of the sewage treatment plants in my country use the aerobic activated sludge method as the core treatment method, which has played a certain role in the denitrification of wastewater, but there are still many problems. For example, the complete nitrification of ammonia nitrogen needs to consume a lot of oxygen, and the energy consumption of aeration in the blast aeration system can account for 40% to 50% of the total energy consumption of the water plant, and the reaction energy consumption is very high; for low C / N ratio wastewater, Additional organic carbon source is required; the process flow is long, the capital construction investment is high, and the floor area is large. Although the anaerobic reaction has the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/302
Inventor 岳秀萍张潇赵博玮
Owner TAIYUAN UNIV OF TECH
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