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A sewage underground infiltration system for treating domestic sewage with low carbon-to-nitrogen ratio

A technology of domestic sewage and low-carbon nitrogen ratio, applied in biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc. problem, to achieve the effect of strengthening the immobilization effect, strengthening the removal effect, and increasing the stability

Active Publication Date: 2019-09-06
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sewage underground infiltration system has problems such as easy clogging and low total nitrogen removal rate. The existing problems can be improved by modifying its biological matrix, and at the same time, the treatment efficiency of low carbon-nitrogen ratio domestic sewage can be improved.

Method used

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  • A sewage underground infiltration system for treating domestic sewage with low carbon-to-nitrogen ratio
  • A sewage underground infiltration system for treating domestic sewage with low carbon-to-nitrogen ratio
  • A sewage underground infiltration system for treating domestic sewage with low carbon-to-nitrogen ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figure 1~3 As shown, an underground sewage infiltration system for treating domestic sewage with a low carbon-to-nitrogen ratio, including a shell 1, a plant 2, a modified biological matrix layer a3, a gravel layer a4, a modified biological matrix layer b5, a gravel layer b6, and a Water device and water outlet device; the plant 2, the modified biological matrix layer a3, the gravel layer a4, the modified biological matrix layer b5 and the gravel layer b6 are arranged in the housing 1 from top to bottom; the housing 1 The bottom of the column body outlet hole 7 is set.

[0027] The housing 1 is 180cm high and 30cm in diameter. The plant 2 is a gramineous plant, Kittengrass, planted in the modified biological matrix layer a3. The modified biological matrix layer a3 is located at 0-55 cm of the shell 1, the gravel layer a4 is located at 55-65 cm of the shell 1, the modified biological matrix layer b5 is located at 65-168 cm of the shell 1, and the gravel layer ...

Embodiment 2

[0034] The difference from Example 1 is that the modified biological matrix layer a3 is located at 0-52 cm of the shell 1, the gravel layer a4 is located at 52-70 cm of the shell 1, and the modified biological matrix layer b5 is located at 70 cm of the shell 1. At -169 cm, the gravel layer b6 is located at 169-180 cm of the shell 1 . The mass ratio of the modified biological matrix layer a3 and the modified biological matrix layer b5 is as follows: grass carbon soil 70%, silicon-aluminum porous material 5%, waste steel scrap 11%, efficient denitrification and phosphorus removal bacteria 14%; The proportion of phosphorus bacteria is: Acidovorax 8%, Lysinibacillus fusiformis 5%, other bacteria 1%.

[0035] The COD content of urban and rural domestic sewage in winter is 600mg / L, the ammonia nitrogen content is 190mg / L, the total nitrogen content is 212mg / L, and the phosphorus content is 14mg / L.

[0036] The COD content in the effluent of the sewage underground infiltration syste...

Embodiment 3

[0038] The difference from Example 1 is that the modified biological matrix layer a3 is located at 0-50 cm of the shell 1, the gravel layer a4 is located at 50-66 cm of the shell 1, and the modified biological matrix layer b5 is located at 66 cm of the shell 1. At -165 cm, the gravel layer b6 is located at 165-180 cm of the shell 1 . The mass ratio of the modified biological matrix layer a3 and the modified biological matrix layer b5 is as follows: grass carbon soil 72%, silicon-aluminum porous material 4%, waste steel scrap 8%, efficient denitrification and phosphorus removal bacteria 16%; The proportion of phosphorus bacteria is: Acidovorax 9%, Lysinibacillus fusiformis 6%, other bacteria 1%.

[0039] The COD content of rural domestic sewage in northern winter is 150-400mg / L, the ammonia nitrogen content is 30-50mg / L, the total nitrogen content is 30-50mg / L, and the phosphorus content is 5-11mg / L.

[0040] The COD content in the effluent of the sewage underground infiltrati...

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Abstract

The invention belongs to the technical field of domestic sewage purification, and specifically relates to an underground sewage infiltration system for treating low carbon-nitrogen ratio domestic sewage. The technical solution of the present invention is as follows: including a shell, a plant, a modified biological matrix layer a, a gravel layer a, a modified biological matrix layer b, a gravel layer b, a water inlet device and a water outlet device; the plants, the modified biological matrix Layer a, gravel layer a, modified biological matrix layer b and gravel layer b are arranged in the shell from top to bottom, the water inlet device is arranged in the gravel layer a, and the water outlet device is arranged in the In the gravel layer b, a column water outlet is provided at the bottom of the shell, and the water outlet device is connected to the column water outlet. The underground sewage infiltration system provided by the present invention for treating low-carbon-to-nitrogen ratio domestic sewage is strengthened by modified biological matrix and immobilization of microorganisms, and has high removal efficiency of various pollutants while ensuring long-term stable operation of the underground sewage infiltration system.

Description

technical field [0001] The invention belongs to the technical field of domestic sewage purification, and in particular relates to an underground sewage percolation system for treating domestic sewage with a low carbon-to-nitrogen ratio. Background technique [0002] With the rapid development of my country's economy, people's living standards have gradually improved, and the organized discharge of domestic sewage has greatly increased. Especially in remote suburban areas, rural areas, scenic tourist areas and other places, due to people's lifestyles and infrastructure construction, domestic sewage is directly discharged into the environment without any treatment, causing the water environment to be polluted to varying degrees. It persecutes the living environment, threatens the health of farmers, and also affects the safety of drinking water. Therefore, it is urgent to strengthen the treatment of domestic sewage, especially domestic sewage with low carbon-to-nitrogen ratio ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/34C02F101/16
Inventor 姜彬慧贾丽萍李春月窦丹妮赵研黄菲胡筱敏
Owner NORTHEASTERN UNIV LIAONING