Tower type earthworm and ecological filter for treating sewage

An ecological filter and domestic sewage technology, applied in the field of runoff pollution and domestic sewage, can solve the problems affecting the process of eutrophication treatment in key river basins and the process of sewage treatment in villages and towns

Inactive Publication Date: 2008-10-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are the following problems in the treatment of sewage in villages and towns: (1) Technically, there are few decentralized treatment processes that can meet the large amount of sewage
[0004] If ...

Method used

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  • Tower type earthworm and ecological filter for treating sewage
  • Tower type earthworm and ecological filter for treating sewage
  • Tower type earthworm and ecological filter for treating sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: A demonstration project of a tower-type earthworm ecological filter-constructed wetland combination system with a daily processing capacity of 12t.

[0032] Design treatment water volume: Q=12t / d.

[0033] The hydrolytic acidification pool is buried underground, and the overall structure is brick-smeared.

[0034] The acidification pool is 5 meters long, 3 meters wide, with an effective depth of 1.2m, a super height of 0.3m, and a total depth of 1.5m. The water inlet pipe is embedded at a height of 25cm from the base of the pool wall, and is downward at an angle of 40° with the pool wall. The effluent is fed into the high-level water distribution tank above the tower earthworm ecological filter through the submersible electric pump. The lower edge of the nozzle is flush with the inner wall of the pool wall. The embedding port is filled with fine stone concrete.

[0035] The total area of ​​the tower earthworm ecological filter part is 45m 2 , the overall...

Embodiment 2

[0046] Example 2: A demonstration project of a tower-type earthworm ecological filter-constructed wetland combination system with a daily processing capacity of 9t.

[0047] Design treatment water volume: Q=9t / d.

[0048] The installation of the hydrolytic acidification tank adopts the buried type, and the tank body adopts a brick and plaster structure.

[0049] The effective depth of the hydrolytic acidification pool is 1.2m, the super height is 0.3m, and the total depth is 1.5m; the length H=4m, the width L=2m; The water inlet pipe is embedded at a height of 30cm from the base of the pool wall, and is downward at an angle of 30° with the pool wall. The effluent is fed into the high-level water distribution tank above the tower earthworm ecological filter through the submersible electric pump. The embedding port is filled with fine stone concrete. The pool is installed in the ground, and the pool body adopts a brick and plaster structure.

[0050] The total area of ​​the ...

Embodiment 3

[0059] Example 3: The pollutant removal effect test of the tower-type earthworm ecological filter-constructed wetland combination system with a daily processing capacity of 12t.

[0060] When the ambient temperature was 25°C, the overall decontamination ability test of the combined process system was carried out. The test conditions were: the surface hydraulic load of the tower-type earthworm ecological filter was 0.8m / d, the dry-wet ratio was 4:1; the surface flow The hydraulic load of the constructed wetland is 0.5m / d, and the results are as follows:

[0061]

[0062] The natural hydraulic retention time of the tower-type earthworm ecological filter is about 175 minutes during operation; the total nitrogen removal capacity of the system has been greatly improved, reaching 87%, indicating that the denitrification capacity of the system has been well strengthened; The material removal rate is above 90%, showing a good removal effect.

[0063] The effluent has reached the n...

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Abstract

The invention provides a combined process of tower angleworm bio-filters and constructed wetlands for treating the domestic sewage. The combined process comprises the following steps: firstly, the sewage enters a hydrolysis-acidification pool and stabilizes after the action, and the water quantity is adjusted; secondly, the domestic sewage in the hydrolysis-acidification pool is distributed into a hydrolysis-acidification pool for removing COD, total nitrogen, nitrogen-nitrogen, total phosphorus and pathogeny microbes; and thirdly, the tail water in the second step enters a constructed wetland to be subjected to strengthening treatment, thereby building a suitable waterfront surroundings landscape, or the tail water is recycled by serving as reclaimed water. The combined process has the following advantages: firstly, the system hydraulic loading is high, and the surface hydraulic loading can reach 1m<3>/m<2>*d, thereby greatly saving land; and secondly, under the high hydraulic loading, the total nitrogen removal rate of the system can reach more than 85 percent; the removal rates of other materials in the system are all more than 90 percent, the effluent reaches the primary standard of the national sewage comprehensive emission standard (GB8978-1996), and reaches the miscellaneous domestic water quality standard of the PRC construction standard (CJ25.1-89), thereby being able to be recycled by serving as the reclaimed water.

Description

technical field [0001] The invention relates to the treatment of domestic sewage, in particular, the domestic sewage and runoff pollution produced in relatively concentrated residential areas in villages and towns are treated by using a combined process of a tower type earthworm ecological filter combined with an artificial wetland. Background technique [0002] Promoting the prevention and control of rural water pollution and ensuring the safety of water supply are important measures for building a new socialist countryside. In 2005, the Ministry of Construction organized a survey of some villages across the country, showing that 96% of the villages did not have drainage ditches and sewage treatment systems; at the same time, with the development of tourism and real estate in my country, a large number of tourist attractions, sanatoriums, villas, and residential areas were built. . However, after these facilities solved the water supply problem, due to various reasons, they...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/32
CPCY02W10/10
Inventor 郑正李军状罗兴章杨世关张继彪黄星发赵国华李坤权孟卓聂耳高顺枝伦琳
Owner NANJING UNIV
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