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Method for improving biological activity of sludge by using primary sedimentation tank

A technology of biological activity and primary sedimentation tank, applied in the direction of water pollutants, sustainable biological treatment, chemical instruments and methods, etc., can solve the problem of affecting the ability and efficiency of pollutant removal, high proportion of inorganic component sludge, effective Low microbial biomass and other problems, to achieve the effect of increasing the proportion of effective microorganisms, increasing the proportion, improving processing capacity and efficiency

Pending Publication Date: 2020-12-04
NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high proportion of inorganic component sludge in the activated sludge treatment system, on the one hand, makes the effective microbial biomass of the biological treatment system to play the role of pollutant removal low, on the other hand, it also makes the actual effective utilization rate of the pool capacity of the biological treatment system low, These all affect the ability and efficiency of pollutant removal
At the same time, it will also bring problems such as wear and tear on the equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: A method for improving the biological activity of sludge by utilizing the primary settling tank, the sludge discharged from the secondary settling tank enters the middle and lower part of the primary settling tank together with the inflow of the primary settling tank through pipelines in a continuous flow or intermittent flow mode The inflow port, or the sludge discharged from the secondary settling tank enters the inflow port in the middle and lower part of the primary settling tank separately through the pipeline, and the water is evenly distributed through the water distribution system of the primary settling tank. Under the low-speed propulsion or stirring action of the propulsion or stirring equipment, the sludge and influent water present a slow upward flow and horizontal swirling flow, and the relatively small active components in the sludge are suspended and flow upward with the water flow. The effluent is discharged into the subsequent biological trea...

Embodiment 2

[0016] Embodiment 2: A kind of method that utilizes primary settling tank to improve the biological activity of sludge, the mixed liquid discharged in the form of excess sludge from the outflow end of the biological treatment system is passed through the pipeline and the influent of the primary settling tank in a continuous flow or intermittent flow mode Enter the inlet of the middle and lower part of the primary sedimentation tank together, or the mixed liquid enters the inlet of the middle and lower part of the primary sedimentation tank through the pipeline, and distribute the water evenly through the water distribution system of the primary sedimentation tank, and then set up in the middle and lower part of the primary sedimentation tank Under the low-speed propulsion or agitation of some low-speed propulsion or stirring equipment, the mixed liquid and the incoming water present a slow upward flow and a horizontal swirl, and the active components with relatively small specif...

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Abstract

The invention discloses a method for improving the biological activity of sludge by using a primary sedimentation tank. The method comprises the following steps: discharging all residual sludge of anactivated sludge biological treatment system into inflow ports in the middle and lower parts of the primary sedimentation tank, enabling the residual sludge to present upward flow and rotational flowin the horizontal direction under the action of low-speed propelling or stirring, suspending active components with relatively small specific gravity in the residual sludge, wherein the residual sludge flows upwards along with water flow, flows out from the upper part of the primary sedimentation tank as effluent of a primary sedimentation tank treatment system and is discharged into a subsequentbiological treatment system, and non-active components with relatively large specific gravity in the residual sludge settle towards the bottom of the primary sedimentation tank and are discharged intoa sludge treatment system together with the primary sedimentation sludge. The method can reduce the content of inorganic components in the sludge of the activated sludge biological treatment system,improve the activity of the sludge and improve the overall efficiency of the biological treatment system.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for improving biological activity of sludge by utilizing a primary sedimentation tank. Background technique: [0002] Compatible with the speed and level of my country's economic development, the development and construction of most cities and towns in my country are in a state of constant change and large-scale development of construction, and an unstable state of large-scale development. The infrastructure is relatively incomplete, and urban rain and sewage collection, transportation and treatment The lag and some deficiencies in the construction of facilities have caused the problems of significantly high suspended solid inorganic components and sediment content in urban sewage (especially sewage from combined and mixed sewage systems) all over the country. [0003] In urban sewage treatment plants with high content of influent suspended solid ino...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/12C02F101/16
CPCC02F3/28C02F3/1221C02F2101/163Y02W10/10
Inventor 郭兴芳熊会斌吴凡松申世峰陶润先
Owner NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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