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An ecological utilization method for purifying rural domestic sewage and waterfowl breeding sewage

A technology for domestic sewage and aquaculture sewage, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of not considering fertilizer utilization, etc., to overcome sewage treatment and vegetable planting Poor effect, improved purification effect, and growth-promoting effect

Active Publication Date: 2018-02-09
南京师大环境科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above sewage treatment technologies only consider how to remove pollutants, but do not consider the conversion of nitrogen and phosphorus (including organic nitrogen and phosphorus and inorganic nitrogen and phosphorus) in rural sewage into fertilizer utilization for crops.
[0004] In addition, CN101913702A discloses a rural domestic sewage treatment system and treatment method: plant crops in greenhouses, install a bioreactor with high load performance in the middle, rely on the microorganisms in the bioreactor to purify the sewage, and the treated bioreactor effluent Reuse; the feature of this method is that the bioreactor is placed in the greenhouse, which has a certain insulation effect on the bioreactor, but this method only collects the carbon dioxide produced by the microbial purification of sewage, and then uses it for the photosynthesis of vegetables in the greenhouse. The effect is required, and the organic matter such as nitrogen and phosphorus in the sewage is not used for the growth of crops in the greenhouse

Method used

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  • An ecological utilization method for purifying rural domestic sewage and waterfowl breeding sewage
  • An ecological utilization method for purifying rural domestic sewage and waterfowl breeding sewage
  • An ecological utilization method for purifying rural domestic sewage and waterfowl breeding sewage

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Experimental program
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Effect test

Embodiment 1

[0035] The main water quality parameters of domestic sewage discharged from villages are as follows: pH is 6.8-8.5, COD is 250-300 mg / L, organic nitrogen content is 25-30 mg / L, and TP (total phosphorus) content is 5-10 mg / L.

[0036] use as image 3 shown in the method for processing:

[0037] (1) After the rural sewage is pretreated by the grid to remove the coarse suspended matter, it flows into the ammonium phosphating biological pool, and the activated sludge of Bacillus and Pseudomonas microorganisms that efficiently decompose organic nitrogen and phosphorus are added and cultivated in the pool, and the amount of sludge is It occupies about 1 / 3 of the pool capacity.

[0038] The ammonium phosphating biological pool adopts an upflow type, and the sewage enters from the bottom and passes through the activated sludge layer upwards, and then overflows from the upper part. The effective residence time of the sewage in the ammonium phosphating biological pool is 5 days, and t...

Embodiment 2

[0043] The main water quality parameters of waterfowl sewage discharged from a duck farm are as follows: pH is 6.5-8, COD is 100-200mg / L, organic nitrogen content is 5-10mg / L, and TP (total phosphorus) content is 2-5mg / L.

[0044] use as image 3 shown in the method for processing:

[0045] (1) After the water poultry sewage is pretreated by the grid to remove the coarse suspended matter, it flows into the ammonium phosphating biological pool, and the activated sludge of Bacillus and Pseudomonas microorganisms that efficiently decompose organic nitrogen and phosphorus are added and cultivated in the pool, and the amount of sludge is It occupies about 1 / 3 of the pool capacity.

[0046] The ammonium phosphating biological pool adopts an upflow type, and the sewage enters from the bottom and passes through the activated sludge layer upwards, and then overflows from the upper part. The effective residence time of the sewage in the ammonium phosphating biological pool is 3 days...

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Abstract

The invention provides an ecological utilization method for purifying rural domestic sewage and waterfowl breeding sewage: the rural domestic sewage and waterfowl breeding sewage are pretreated and flowed into the ammonia phosphating biological pool, in which there are microorganisms containing Bacillus and Pseudomonas Sludge can convert the organic nitrogen and organic phosphorus in the sewage into ammonia nitrogen and inorganic phosphorus respectively; then flow the sewage into the phytase mixing tank for treatment; then flow the sewage into the "light fertilizer type" aquatic vegetable planting canal, and erect A light-transforming film greenhouse that can absorb or convert ultraviolet rays in sunlight into blue and red light. The top of the greenhouse is equipped with a solar-LED high-efficiency vegetable light source system for vegetable supplementary light; finally, the effluent from the planting canal flows into the ecological pool. There are aquatic plants and animals in the ecological pool, and the ecological pool water is used for irrigation or reuse after treatment. The invention organically combines sewage treatment with vegetable planting, and can obtain greater benefits by efficiently decomposing organic nitrogen and phosphorus in sewage and converting them into fertilizers required for vegetable growth.

Description

technical field [0001] The invention relates to a rural water pollution control method, in particular to an ecological utilization method for purifying rural domestic sewage and waterfowl breeding sewage, and belongs to the technical field of sewage treatment. Background technique [0002] Due to its dispersed nature, rural sewage is difficult to collect and treat centrally. It has become an important pollution source of the water environment. Therefore, it is increasingly urgent to study ecological treatment technologies suitable for rural domestic sewage. [0003] CN101948219A discloses a method for treating rural sewage from three-stage septic tanks, sumps, tower biofilters and wetlands. CN101973637A discloses a rural sewage system for river purification using abandoned river courses or low-lying near-natural river courses to construct settlement units, artificial bionic material contact oxidation units, vertical flow artificial wetland units and floating vegetable units....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/38C02F101/30
CPCY02W10/37
Inventor 张显球许崇正杨维本王国祥杜明霞
Owner 南京师大环境科技研究院有限公司