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A transition ring ecological treatment system and method for village and town sewage

A technology of ecological treatment and transition ring, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of small back-end load, unreduced pollution load, and large pollution load To achieve the effect of improving the anti-clogging ability, increasing the sewage load rate, and optimizing the water flow state

Active Publication Date: 2022-04-26
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The ecological filter bed process is an ecological process with excellent treatment effect and low investment. However, the traditional ecological filter bed generally suffers from poor operation due to clogging of filter materials.
Studies have shown that the removal rate of pollutants at 1000mm from the water inlet can reach 70%. It can be seen that the pollution load on the front of the water inlet is relatively large, so blockage generally occurs in this area; The concentration of pollutants is gradually reduced, especially the back-end load is small, and the utilization rate is low, which will cause waste of land occupation
The blockage of the ecological filter bed is generally the pollutants trapped in the pores of the filter material and the biofilm attached to the surface of the filter material layer. It needs to be removed by washing, chemical cleaning, and replacing the filter material. The pollution load received has not abated and will soon become clogged again

Method used

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  • A transition ring ecological treatment system and method for village and town sewage
  • A transition ring ecological treatment system and method for village and town sewage
  • A transition ring ecological treatment system and method for village and town sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] as attached Figure 1-3 As shown, a village and town sewage transition ring ecological treatment system includes a pretreatment unit 1 and a main treatment unit 2 .

[0088] The pretreatment unit 1 includes a brick semi-buried structure, and a pre-sedimentation tank 11, a water collection well 12 and a distribution well 13 are constructed by using the small brick method.

[0089] A water inlet 111 is provided on one side of the pre-sedimentation tank 11 , and a water outlet and discharge hole 112 that communicates with the water collection well is provided on the other side of the pool. A water inlet channel 113 is arranged at the bottom of the water inlet 111 in the pre-sedimentation tank 11, and a water inlet and drainage hole 1131 is arranged at the bottom of the water inlet channel 113;

[0090] In the pre-sedimentation tank 11, there is a slag separation plate 114 near the discharge hole 112, and the middle part of the slag separation plate 114 corresponds to the ...

Embodiment 2

[0105] Use embodiment 1 system to carry out the method for sewage treatment, may further comprise the steps:

[0106] S1. Sewage raw water pretreatment:

[0107] The raw sewage water is passed into the pre-sedimentation tank from the water inlet, and the floating impurities in the water are intercepted by the slag separation plate, and the sedimentary impurities are deposited in the mud pit; the water flows into the water collection well through the discharge hole; the floating impurities are regularly removed, and the mud pit is sucked out medium sediment.

[0108] According to the water level in the water collection well, use the water pump to pump the water in the water collection well into the anoxic biological contact area, keep the water level in the water collection well at the lowest level, so that the water in the pre-sedimentation tank and the distribution well can flow to the water collection well by itself.

[0109] S2. Ecological treatment:

[0110] S21. The wat...

Embodiment 3

[0116] The system of Example 1 and the method of Example 2 were used as the experimental group for sewage treatment, and the traditional subsurface flow constructed wetland treatment system was used as the control group. The average influent COD is 200mg / L, the average SS is 60mg / L, the average TN is 50mg / L, the average TP is 15mg / L, and the average operating temperature is about 25°C.

[0117] Compare the use of the experimental group and the control group after two years of operation:

[0118] Experimental group: The pre-sedimentation tank with an area of ​​15% can remove 86% of solid matter, which reduces the SS content entering the main treatment unit. The accumulation of organic matter on the surface of the filter material at the water inlet is 2kg / m 3 , bulk density is about 0.1g / cm 3 ;Clogs account for 20% of the voids in the filter material, and organic matter in the clogs accounts for 40%; the amount of sewage to be treated can reach 5-20m 3 / d, surface load 2.5-4....

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Abstract

The invention discloses a transition ring type ecological treatment system for sewage in villages and towns, which includes a pretreatment unit and a main treatment unit; the pretreatment unit includes a pre-sedimentation tank, a water collection well and a distribution well; the pre-settling tank is provided with a water inlet; The pre-sedimentation tank and the distribution well are connected; and the water pump is installed in the water collection well; the distribution well is provided with a water outlet; the main processing unit is a concentric structure, including anoxic biological contact area set up from the outer circle to the inner circle, and the ecological filter Area and aerobic pond area; the water pump pumps the water in the collection well into the anoxic biological contact area, passes through the ecological filter area and the aerobic pond area, and returns to the distribution well through the return pipe. And it discloses a method of using the system for sewage treatment. The invention can reduce the pollutant load at the front end, increase the pollutant load at the rear end, effectively alleviate the clogging problem, and prolong the service life; a natural and stable functional partition can be formed in the main body through a transitional connection mode to improve the water quality.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, and more specifically relates to a transition ring ecological treatment system and method for sewage in villages and towns. Background technique [0002] Village and town sewage discharge is small and scattered, the water quality fluctuates greatly, monitoring and maintenance is inconvenient, and it is not suitable to apply the urban sewage treatment model. Therefore, in the actual treatment process, it should be used on the spot, and the ecological cycle mode should be selected for treatment. [0003] The ecological filter bed process is an ecological process with excellent treatment effect and low investment. However, the traditional ecological filter bed generally suffers from poor operation due to clogging of filter materials. Studies have shown that the removal rate of pollutants at 1000mm from the water inlet can reach 70%. It can be seen that the pollution load on the front of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/52C02F2001/007C02F3/30C02F3/2806C02F3/32C02F2301/046C02F1/001
Inventor 刘建伟史世强
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE