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A high-efficiency denitrification sewage land infiltration system

A land infiltration and sewage technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc. Up to standard and other issues, to achieve the effect of improving removal efficiency, increasing removal rate, and prolonging residence time

Inactive Publication Date: 2016-08-24
龙善环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the face of increasingly stringent sewage discharge standards and the limited environmental capacity of the receiving water body, the removal rate of total nitrogen in the traditional sewage land infiltration system is low, generally around 50% to 60%, and the discharge concentration of total nitrogen does not exist. The risk of reaching the standard or polluting the receiving water body restricts the further promotion and application of the sewage land infiltration process

Method used

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  • A high-efficiency denitrification sewage land infiltration system

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Comparison scheme
Effect test

Embodiment 1

[0017] The height of the system is 1.4 meters; the cover layer 2 is filled with meadow brown soil with a height of 30 cm, and the vegetation layer 1 is planted with ryegrass and tall fescue; ~10 microns) and activated sludge according to the ratio of 7:2:1, the water distribution layer 3 is 40 cm in height; the water distribution pipe 4 is laid in the water distribution layer 3; the bottom of the water distribution pipe 4 is made of high-density polyethylene material The primary impermeable container 5 is filled with gravel with a particle size of 5-10 mm around the primary impermeable container 5; the fine filter layer 7 is composed of soil, coal cinder (with a particle size of 4-10 mm), sand (with a particle size of 2~10 microns), rice husk and iron filings are composed according to the ratio of 50:20:20:9:1, and the height of this layer is 70 cm; a row of secondary impermeable dishes 6 are laid in the fine filter layer 7, located in a At a vertical distance of 20 centimeter...

Embodiment 2

[0019] The height of the system is 1.8 meters; among them, the cover layer 2 is filled with meadow brown soil, with a height of 40 cm, above which is the vegetation layer 1, planted with purple alfalfa and tall fescue; below the cover layer 2 is composed of soil, coal cinder (particle size of 5~ 10 microns) and activated sludge according to the ratio of 6:3:1, the water distribution layer 3 is 50 cm in height; the water distribution pipe 4 is laid in the water distribution layer 3; the bottom of the water distribution pipe 4 is made of high-density polyethylene material The primary impermeable container 5 is filled with gravels with a particle size of 5-10 mm around the primary impermeable container 5; the fine filter layer 7 is composed of soil, cinder (particle size 4-10 mm), sand (particle size 2 ~10 microns), rice husk and iron filings are composed according to the ratio of 50:30:10:9:1, and the height of this layer is 90 cm; in the fine filter layer 7, a layer of secondary...

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Abstract

The invention discloses a high-efficiency denitrification sewage land infiltration system and relates to a sewage treatment and recycling system. The system sequentially consists of a vegetable layer, a cover layer, a water distribution layer, a refined filtration layer, a water collection layer and an impermeable layer from top to bottom, wherein the water distribution layer contains a row of first-grade water-impermeable vessels at intervals, water distribution pipes are arranged above the first-grade water-impermeable vessels, and gravels are filled around the water distribution pipes; the refined filtration layer contains a row of second-grade water-impermeable vessels at intervals, and gravels are filled in the second-grade water-impermeable vessels; each first-grade water-impermeable vessel and each second-grade water-impermeable vessel have distance in a vertical direction and are arranged in a staggered manner; the refined filtration layer consists of soil, sand, coal cinders and a mixed base material which is prepared from rice hulls and a small amount of iron scraps in proportion; the impermeable layer is prepared from a high-density polyethylene film. The system has double layers of water-impermeable vessels, can be used for prolonging the retention time of sewage in the infiltration system by changing and controlling water motion during sewage land infiltration, and has the advantage of effectively improving the denitrification efficiency of the system.

Description

technical field [0001] The invention relates to a sewage treatment and reuse system, in particular to a high-efficiency denitrification sewage land infiltration system. Background technique [0002] According to the 2013 Environmental Bulletin, the total discharge of ammonia nitrogen in my country was 2.457 million tons, a decrease of 3.1% compared with the previous year. The eutrophication of water bodies is still relatively serious, and the water pollution situation is still severe. It is necessary to strengthen the treatment of decentralized sewage. However, due to the wide source of dispersed sewage, complex pollutants, and no collection and discharge pipelines, the traditional sewage treatment methods widely used in urban sewage treatment plants generally have high infrastructure and operating costs, and require a complete sewage collection and transportation system. , not suitable for decentralized sewage. Sewage land treatment technology can solve the above problems ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/30
CPCC02F3/302C02F3/32C02F2101/16
Inventor 王鑫王士满王洪
Owner 龙善环保股份有限公司