Biomass charcoal-dominated farmland return water pollution intercepting and recycling system and method

A technology of biochar and water pollution, applied in the direction of biological water/sewage treatment, water pollutants, chemical instruments and methods, etc., can solve the problems that can not achieve good control of agricultural non-point source pollution, effective utilization of agricultural waste resources, etc. Achieve good economic and environmental benefits, efficient and stable performance, and strong flexibility

Active Publication Date: 2022-02-18
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing non-point source pollution control technologies, including vegetation buffer zone, pre-storage technology and artificial wetland technology, can only play a certain role in controlling non-point source pollution, and cannot achieve good control of agricultural non-point source pollution and agricultural pollution. Effective utilization of waste resources

Method used

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  • Biomass charcoal-dominated farmland return water pollution intercepting and recycling system and method
  • Biomass charcoal-dominated farmland return water pollution intercepting and recycling system and method
  • Biomass charcoal-dominated farmland return water pollution intercepting and recycling system and method

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Embodiment 1

[0031]Aiming at the problems that the existing technology cannot achieve good control of agricultural non-point source pollution and the effective utilization of agricultural waste, the present invention provides a biochar-based efficient interception and reuse system for farmland water receding pollution, such as figure 1 As shown, the flexible combination of bacteria and algae reactor 1 and biochar reactor 2 can realize the adsorption and degradation of nitrogen, phosphorus and pesticides in water in different periods of farmland dewatering, and improve the problem of non-point source pollution of farmland dewatering.

[0032] The bacteria and algae reactor 1 includes the bacteria and algae reactor pool body 3 , the biomass charcoal algae bacteria composite filter device and the aeration device arranged in the bacteria and algae reactor pool body.

[0033] The biomass charcoal algae bacterium composite filter device is provided with a biomass charcoal algae bacterium composit...

Embodiment 2

[0053] A method for efficiently intercepting and reusing farmland water receding pollution dominated by biochar, using the biochar-led efficient intercepting and reusing system for farmland water receding pollution described in Example 1 to implement the method, and farmland receding water enters After the bacteria and algae reactor, the first electromagnetic valve is closed after the water flow reaches the set value of the flowmeter, and the aeration fan starts to work for aeration. ; Then the second electromagnetic valve at the first water outlet is opened, and the effluent after the completion of the reaction of the bacteria and algae reactor enters the biochar reactor, and the hydraulic retention is 6-8h. After the water pressure is reached, the hydraulic retention is 6-8 hours, the third solenoid valve at the second water outlet is opened, the supernatant is discharged, and the bottom sludge is returned to the pesticide-specific degradation and adsorption part through the ...

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Abstract

The invention discloses a biomass charcoal-dominated farmland return water pollution intercepting and recycling system and method. The system comprises a bacteria-algae reactor and a biomass charcoal reactor; the bacteria-algae reactor comprises a bacteria-algae reactor tank body, and a biomass carbon-algae-bacteria composite material filtering device and an aeration device which are arranged in the bacteria-algae reactor tank body; the biomass carbon-algae-bacteria composite material filtering device is provided with a biomass carbon-algae-bacteria composite filler; and the biomass charcoal reactor comprises a biomass charcoal reactor pool body, an adsorption interception part located on the upper layer of the biomass charcoal reactor and a pesticide obligate degradation adsorption part located below the adsorption interception part, the adsorption interception part is provided with an adsorption interception biomass charcoal filler, and the pesticide obligate degradation adsorption part is provided with a pesticide obligate degradation biomass charcoal filler. By implementing the method, full-chain farmland nitrogen and phosphorus loss prevention and control and recycling can be realized, and the environmental pressure caused by agricultural non-point source pollution can be effectively reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of agricultural environmental protection, and in particular relates to the technology for treating farmland water pollution. 【Background technique】 [0002] With the extensive use of pesticides and chemical fertilizers, the rapid development of my country's agricultural industry has also caused serious non-point source pollution problems. According to scientific calculations, in 2020, the utilization rate of chemical fertilizers and pesticides in the three major grain crops of rice, wheat, and corn is 40.2%, and that of pesticides is 40.6%. During surface runoff and underground seepage, pollutants such as nitrogen, phosphorus, and pesticides are brought into natural water bodies, resulting in water quality degradation and ecosystem degradation. At present, the existing non-point source pollution control technologies, including vegetation buffer zone, pre-storage technology and artificial wetland technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/00C02F101/10C02F101/16C02F101/30
CPCC02F3/325C02F3/00C02F2003/003C02F2101/30C02F2101/16C02F2101/105Y02W10/10
Inventor 单胜道庄海峰虞轶俊赵宇飞卢云鹏
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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