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Sewage treatment system with composite biological diatomite filter basin and rural sewage treatment method adopting system

A sewage treatment system, biological diatomite technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of low treatment load, unstable treatment effect, and application limitations and other problems, to achieve the effect of high impact load resistance

Inactive Publication Date: 2014-04-16
鲁骎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional activated sludge process is commonly used in rural sewage treatment, but it has problems such as high investment, large area, low treatment load, long hydraulic retention time, low sludge concentration and unstable treatment effect.
Other low-energy integrated sewage treatment processes with different forms of no power or micro power have also been applied, but it also has the problem of low treatment efficiency, especially the low removal rate of nitrogen and phosphorus, and nitrogen and phosphorus pollution is the cause of rich water bodies. main cause of nutrition
The application of biofilm sewage treatment technology in rural sewage treatment is limited due to its high investment in membrane bioreactors, complex operation and management, and high energy consumption.

Method used

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  • Sewage treatment system with composite biological diatomite filter basin and rural sewage treatment method adopting system
  • Sewage treatment system with composite biological diatomite filter basin and rural sewage treatment method adopting system

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 Shown, a kind of composite biological diatomite filter sewage treatment system, it comprises a composite biological diatomite filter 1, composite biological diatomite filter consists of front anoxic zone, central aerobic zone and rear clarification zone Composed of three parts, a coarse grid is set in front of the sewage inlet pipe, the anoxic area at the front end of the filter is connected to the sewage water inlet pipe, the anoxic area is divided into two parts, each block is equipped with an agitator 2, 3, and the aerobic area in the middle of the filter tank There are two aerators 5, and the outlet of the blower 4 is connected to the inlets of the two aerators in two ways; the upper part of the clarification area at the rear of the filter is square, and the lower part is triangular; the lower end of the clarification area is connected to the sludge pipe to the sludge pump 7 inlet , the outlet of the sludge pump is connected to a pipeline back to th...

Embodiment 2

[0032] The method that the composite biological diatomite filter sewage treatment system of embodiment 1 is used to process rural sewage:

[0033]After removing large particles of physical impurities, the sewage enters the anoxic zone at the front end of the composite biological diatomite filter 1, and the sewage and the return sludge are evenly mixed by the agitator 2 and 3, and the heterotrophic bacteria in this zone mix the macromolecular organic matter Decompose into small molecular substances, convert insoluble organic matter into soluble organic matter, denitrifying bacteria reduce nitrite nitrogen and nitrate nitrogen into gaseous nitrogen; then the sewage enters the middle aerobic zone of the composite biological diatomite filter 1, and is blown by the blower 4 Blow air, supply oxygen and stir the water body through the aerator 5, control the dissolved oxygen concentration ≥ 2mg / L, and add compound diatomite to the water inlet of the area from the compound diatomite dos...

Embodiment 3

[0036] The method that the composite biological diatomite filter sewage treatment system of embodiment 1 is used to process rural sewage:

[0037] The treatment method is basically the same as in Example 2. In this method, diatomite: the ratio of other carriers is 10:1; the sludge reflux ratio is 1.0; the hydraulic retention time of the composite biological diatomite filter is: anoxic zone 3 6 hours in the aerobic zone and 2 hours in the clarification zone; the air-water ratio of the aerator in the aerobic zone is 15:1; the surface load in the clarification zone is 0.8m 3 / m 2 .h; control the upward flow rate in the clarification zone at 0.8m / h to ensure that the diatomite and other compound carriers with microorganisms will form a 1-meter-high suspension layer in the clarification zone.

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Abstract

The invention discloses a sewage treatment system with a composite biological diatomite filter basin and a rural sewage treatment method adopting the system. The system comprises the composite biological diatomite filter basin. The treatment method comprises the following steps: feeding sewage into a front oxygen deficient zone of the filter basin, and uniformly mixing the fed sewage with return sludge through agitating; then feeding mixed liquid into a middle aerobic zone of the filter basin, blowing by a blower, supplying oxygen by an aerator, agitating, adding composite diatomite to a water-in part of the zone, fully reacting, oxidizing COD into CO2 and water by the formed biological diatomite, oxidizing NH3-N(NH4+-N) into NO3- -N, and attaching other pollutants on or around the biological diatomite; finally feeding the mixed liquid into a rear settling zone of the filter basin, forming a sludge suspension layer through the control of a certain rising flow rate so as to realize sludge and water separation, returning part of the settled biological diatomite to the oxygen deficient zone of the filter basin in a sludge form, and drying the rest sludge. The sewage treatment system and the rural sewage treatment method have the advantages of high treatment load, short stay time, simplicity in operation and running, great treatment effect and rapid system recovery.

Description

technical field [0001] The invention belongs to the technical field of environmental protection sewage treatment, and in particular relates to a sewage treatment system of a compound biological diatomite filter and a rural sewage treatment method using the system. Background technique [0002] With the development of economy, my country's environmental pollution is rapidly spreading from cities to rural areas, and the environmental pollution caused by rural sewage is becoming more and more serious. The random discharge of rural sewage has become the main cause of water pollution in rural areas of our country. At present, the traditional activated sludge process is commonly used in rural sewage treatment, but it has problems such as high investment, large floor area, low treatment load, long hydraulic retention time, low sludge concentration and unstable treatment effect. Other low-energy integrated sewage treatment processes with different forms of no power or micro power h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 鲁骎曹达文肖中新
Owner 鲁骎
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