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Method for treating dispersed domestic sewage

A technology of domestic sewage and treatment method, which is applied in the field of water treatment, can solve the problems that nitrogen pollutants are not fundamentally removed, cannot meet the anoxic environment of denitrifying bacteria, etc., and achieves the effect of reducing total nitrogen index and removing ammonia nitrogen.

Active Publication Date: 2014-03-05
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Only an aerobic environment is provided, which cannot meet the anoxic environment required by denitrifying bacteria. Therefore, the nitrogen source only changes in form, that is, ammonium nitrogen is converted into nitrate nitrogen, and nitrogen pollutants are not fundamentally removed.

Method used

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  • Method for treating dispersed domestic sewage
  • Method for treating dispersed domestic sewage
  • Method for treating dispersed domestic sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0023] This method is used to treat domestic sewage around a reservoir in the south. The annual water temperature is ≥15°C and the sewage volume is 3 tons / day. The size of the land sewage infiltration tank 2 is 6×6×1.2m. Set a perforated pipe with a pipe diameter of 10 cm as the water distribution pipe 9, the center of the water distribution pipe 9 is 20 cm from the upper part of the device, and the bottom of the system is provided with a perforated pipe with a pipe diameter of 10 cm as the water collection pipe 12. Filled with gravel 13, which is wrapped with water-permeable non-woven fabric 14, soil sewage infiltration treatment tank 2 is filled with graded soil 10, and turf 7 is planted on the surface. The fluidized bed 4 is a central tube air-lift internal circulation structure, and the reactor is made of plexiglass, with an inner diameter of 1m, an effective height of 1m, and an effective volume of 6m 3 , the volume filling rate of the bacteria particles embedded in the f...

Embodiment 2

[0025] This method is used to treat domestic sewage in northern rural areas. There are 4 months of the year where the water temperature is ≤15°C and the sewage volume is 45 tons per day. The size of the land sewage infiltration tank 2 is 25×20×1.2m. A perforated pipe with a pipe diameter of 20 cm is set in the groove as the water distribution pipe 9, and the center of the water distribution pipe 9 is 20 cm away from the upper part of the device. The bottom of the system is provided with a perforated pipe with a diameter of 20 cm as the water collection pipe 12. Gravel 13 is filled around the pipe, which is wrapped with water-permeable non-woven fabric 14, the soil sewage infiltration treatment tank 2 is filled with graded soil 10, and turf 7 is planted on the surface. The fluidized bed 4 is a central tube air-lift internal circulation structure, and the reactor is made of plexiglass, with an inner diameter of 10.6 m, an effective height of 2 m, and an effective volume of 180 m ...

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Abstract

Disclosed is a method for treating dispersed domestic sewage, which includes the following steps that the sewage is guided into a soil sewage infiltration treatment tank, organic pollutants and phosphorus pollutants in raw sewage are intercepted, transformed and degraded by the soil sewage infiltration treatment tank, and then water which is rich in ammonia nitrogen enters into a middle pool, by the aid of lifting of a water pump, the water which is rich in ammonia nitrogen enters into a fluidized bed which is filled with embedding nitrobacterium particles, under the action of the embedding nitrobacterium, the ammonia nitrogen in the water is rapidly oxidized to nitrate, afterwards solid particles are separated from the water through tail end grids of the fluidized bed, one part of effluent is directly discharged, one part of clean water reflows through the water pump and is mixed with the raw sewage at the end of a water inlet, and then enters into the soil sewage infiltration treatment tank, the nitrate in the water is subjected to a denitrification reaction in the oxygen-deprived environment of the soil, and the nitrate is transformed into nitrogen, thereby nitrogen pollutants in the water are removed. The method for treating dispersed domestic sewage is capable of removing organic matters and the phosphorus pollutants, simultaneously the ammonia nitrogen in water can be effectively removed and total nitrogen index can be reduced.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a decentralized domestic sewage treatment method for lakes, rivers, reservoir surrounding residential areas and rural areas, and belongs to the technical field of environmental protection. Background technique [0002] Water pollution has seriously affected the healthy life of our residents and the sustainable development of the economy. In places above the town level, domestic sewage is generally collected through pipelines, and urban domestic sewage treatment plants are built to remove organic matter, nitrogen, phosphorus, etc. in the sewage through biochemical methods. The construction cost is high, and the operation and maintenance cost is high. For areas around lakes and reservoirs in my country, the pipeline network construction is backward, and the villages are extremely scattered and the amount of sewage is small. It is uneconomical and impractical to collect and centralize th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 严立董文杰黄礼共张业健
Owner WENZHOU UNIV
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