Rural domestic sewage treatment device and sewage treatment method

A technology for domestic sewage and treatment devices, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, anaerobic digestion treatment, etc., and can solve the problem that the constructed wetland system cannot remove total nitrogen and ammonia nitrogen from rural domestic sewage at the same time. , to reduce the number of colonies, improve the removal efficiency, and achieve the effect of efficient removal

Active Publication Date: 2019-05-17
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a rural domestic sewage treatment device and a sewage treatment method. The treatment device and the treatment method can solve the problem that the existing constructed wetland system cannot remove the total amount of rural domestic sewage at the same time without increasing the operating cost and the occupied area. Technical problems of nitrogen and ammonia nitrogen, to achieve efficient removal of total nitrogen and ammonia nitrogen in rural domestic sewage

Method used

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  • Rural domestic sewage treatment device and sewage treatment method
  • Rural domestic sewage treatment device and sewage treatment method
  • Rural domestic sewage treatment device and sewage treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 with 2 As shown, a rural domestic sewage treatment device includes a pool body, which is separated into a vertical flow artificial wetland pool 1 and an AAO filter pool 2 connected in sequence by a first partition wall 3;

[0051] Among them, a water inlet pipe 12 is provided above the vertical flow artificial wetland pool 1, and the water inlet pipe 12 is connected with the water inlet pump 11, and the water inlet pump 11 is connected with the regulating tank for carrying rural domestic sewage, and the water inlet pump 11 pumps the sewage to the water inlet pipe 12 and enter the vertical flow constructed wetland pool 1 through the water inlet pipe 12. Just below the water inlet 121 of the water inlet pipe 12 is provided with buffer plates 13 such as plastic plates or stainless steel plates that can withstand water pressure 15 times larger than the water inlet area. The material of water inlet pipe 12 can be common water inlet pipes such as steel pipe...

Embodiment 2

[0065] In this embodiment, rural domestic sewage in a typical plain river network area is used for treatment. Before treatment, the indicators of various pollutants in the sewage are as follows: COD is 146mg / L, ammonia nitrogen is 36mg / L, TN is 41mg / L, and TP is 3mg / L. Fecal coliform count 3.5×10 6 a / L.

[0066] The mode of controlling intermittent water inflow is: water inflow 6 times a day, water inflow time is 120min / day, hydraulic load is 0.15m 3 / m 2 d, the hydraulic retention time is 2 days.

[0067] result Figure 8 Shown: After artificial wetland treatment, the removal rates of COD, ammonia nitrogen, TN and TP in the anaerobic tank were 89%, 85%, 47% and 24%, respectively, and fecal coliform bacteria from 3.5×10 6 A / L reduced to 2.1×10 4 a / L. After anoxic and aerobic treatment, the concentrations of pollutants in the effluent were reduced to 4.8mg / L, 2.7mg / L, 19.6mg / L, 2.0mg / L and 1.9×10 4 a / L.

Embodiment 3

[0069] A small test was used to compare the effluent quality of different treatments, among which, the following treatments were set:

[0070] (1) device structure of the present invention;

[0071] (2) U-shaped anaerobic zone constructed wetland + AAO; U-shaped anaerobic zone constructed wetland refers to a vertical flow constructed wetland in which the drain is placed outside the pool body and higher than the bottom of the pool. The constructed wetland in the U-shaped anaerobic zone is connected in series with the AAO, and the sewage is firstly treated by the constructed wetland, and then enters the AAO filter through the outlet for further treatment.

[0072] (3) Constructed wetland + AAO. Constructed wetlands refer to vertical flow constructed wetlands where the outfall is level with the bottom of the pool. The constructed wetland is connected in series with the AAO, and the sewage is firstly treated by the constructed wetland, and then enters the AAO filter through the ...

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Abstract

The invention discloses a rural domestic sewage treatment device and a sewage treatment method. The device comprises a tank body, wherein the tank body is sequentially separated into a vertical-flow constructed wetland tank and an AAO (Anodic Aluminum Oxide) filtering tank, which are communicated with each other, through a first partition wall; the AAO filtering tank is separated into an anaerobiczone, an anoxic zone and an aerobic zone in sequence along the horizontal direction; the anaerobic zone and the anoxic zone are separated through a second partition wall; a flow guide wall is arranged between the anoxic zone and the aerobic zone; a water passing hole capable of controlling opening and closing is formed in the bottom of the second partition wall; a communication hole communicatedwith the anaerobic zone is formed in a bottom side wall of the vertical-flow constructed wetland tank; a water outlet is formed in a part, located on the aerobic zone, of a tank wall of the AAO filtering tank. According to the treatment device and the treatment method, provided by the invention, the technical problem that total nitrogen and ammonia nitrogen in rural domestic sewage cannot be removed at the same time through an existing constructed wetland system is solved based on no increase of operation cost and occupied area and efficient removal of the total nitrogen and the ammonia nitrogen in the rural domestic sewage is realized.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a rural domestic sewage treatment device and a sewage treatment method. Background technique [0002] Due to highly scattered villages and insufficient funds, the treatment rate of rural domestic sewage in my country is about 20% at present, and most of the domestic sewage is directly discharged into rivers and lakes without treatment, which aggravates water pollution and affects the quality of farmers' living environment. [0003] Biological and ecological treatment methods are often used in domestic sewage treatment. Compared with biological treatment, the ecological treatment process has the characteristics of simple operation and maintenance and low operating cost, and is more suitable for remote areas with insufficient funds. The decentralized ecological treatment process is mainly based on constructed wetlands. Constructed wetlands achieve the removal of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/30C02F3/28C02F3/34
Inventor 盛晓琳刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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