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Reoxygenation-strengthening biological sewage treatment method for circulating drainage pipeline

A sewage biological treatment and drainage pipeline technology, which is applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problems of large changes in sewage raw water quality and large changes in treatment load, and achieve The effect of reoxygenation is obvious and effective, the air circulation is strong, and the effect of increasing air flow and velocity

Inactive Publication Date: 2012-06-13
HARBIN INST 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 technical problems of large changes in raw water quality and large changes in treatment load in the existing method for treating sewage in sewage treatment plants, and provides a biological treatment method for sewage in circulating drainage pipes that strengthens reoxygenation

Method used

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  • Reoxygenation-strengthening biological sewage treatment method for circulating drainage pipeline
  • Reoxygenation-strengthening biological sewage treatment method for circulating drainage pipeline
  • Reoxygenation-strengthening biological sewage treatment method for circulating drainage pipeline

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specific Embodiment approach 1

[0010] Specific embodiment one: a kind of strengthened reoxygenation circulation drainage pipeline sewage biological treatment method of this embodiment is as follows: select the sewage pipeline that length is 300m~5000m in the drainage pipe network, add filler to the sewage pipeline to make the flow velocity of sewage It is 30% to 100% of the sewage flow rate when no filler is added, and the microbial mass on the filler is 1000 to 5000mg / L; at the same time, the backflow pipeline is set, and the volume of the backflow sewage is 10% to 100% of the volume flow of the sewage in the pipeline; in the pipeline Set high and low blowing devices alternately on the top and seal the inspection well between the blowing devices. The height of the high blowing device is 5m-10m, the height of the low blowing device is 1m-2m, and the pipe diameter of the blowing device is 20% to 30% of the pipe diameter of the pipe section, the distance between the air extraction devices is 100m to 500m; the ...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the filler is a combined filler, which consists of a hardened skeleton and hard fiber filaments bound to the skeleton. Others are the same as in the first embodiment.

[0013] The hardened filler in this embodiment has a certain mechanical strength for the skeleton, which is particularly important in drainage pipes with relatively high water flow velocity. The hard fiber filaments in the combined filler are soft fillers, making full use of the surface area of ​​the soft filler. On the one hand, it is easy to hang a film; The structure is updated to ensure its processing effect.

specific Embodiment approach 3

[0014] Embodiment 3: This embodiment is different from Embodiment 1 in that the filler is a degradable material. Others are the same as in the first embodiment.

[0015] The filler in this embodiment is a degradable material, which can prevent the filler from clogging after long-term use.

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Abstract

The invention relates to a sewage treatment method, in particular to a reoxygenation-strengthening biological sewage treatment method for circulating drainage pipelines, which aims at solving the technical problems that variation of raw water quality is large in seasonality and per day and treatment load variation is large by means of an existing sewage treatment method of a sewage treatment plant. The method comprises the following steps: adding fillers accompanied with microorganism into the drainage pipelines in a drainage pipe network, simultaneously arranging a backflow pipeline and installing air draft devices separated in a high-and low mode on the pipeline; and discharging sewage into the pipeline, enabling the sewage to stay for 3-5hours by waterpower, and finishing biological sewage treatment of the drainage pipelines. The method can enable chemical oxygen demand (COD) of the sewage in the drainage pipelines to be reduced by 30%-70%, and can be used for drainage pipe networks of combined systems, separate systems and partial combined systems of cities and towns.

Description

technical field [0001] The invention relates to a sewage treatment method. Background technique [0002] At present, my country's water environment is facing three major problems: 1. The lack of ecological water use. The utilization rate of surface water resources in the Liaohe River, Huaihe River, and Yellow River has far exceeded the internationally recognized upper limit of 40% for river development and utilization. Even closer to 90%. Second, the discharge of major pollutants far exceeds the capacity of the water environment. According to expert estimates, my country's COD emissions exceeded 70% of the environmental capacity last year. 3. Rivers and lakes are generally severely polluted. Among the 741 monitoring sections of the seven major river systems in the country, the water quality of 41% of the monitoring sections is inferior to the fifth-class standard, and 75% of the lakes in the country are eutrophic to varying degrees. Last year, the State Environmental Prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/02
CPCY02W10/10
Inventor 赫俊国李博史志广王岩刘剑
Owner HARBIN INST OF TECH
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