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Method utilizing charcoal to achieve rural non-point source pollution denitrogenating

A non-point source pollution, biochar technology, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as single effective control, difficult to define pollution sources, and difficult to quantify. , to achieve the effect of low price, low cost and small amount of transformation

Inactive Publication Date: 2013-06-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Agricultural non-point source pollution has the characteristics of dispersion, uncertainty, and difficulty in quantification. It is difficult to define pollution sources and have a single effective means to control them.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Straw is used as raw material, and it is stored after being dried and weathered outdoors. The straw with low moisture content was put into a high-temperature-resistant airtight container, heated in a muffle furnace at 300°C for 3 hours in the absence of oxygen, and cooled naturally to room temperature to prepare biochar. The prepared biochar is pulverized, and the particle size is about 10mm. Find a water catchment area in the farmland around Beijing, mix biochar and soil at a mass ratio of about 1:4, then fill it under the reaction water catchment area, and connect a diversion pipe at the same time, so that samples can be quickly sampled by biological Sewage after charcoal treatment. When the rainy season comes, measure the ammonia nitrogen and nitrate nitrogen in the sewage flowing into the catchment area. After 30 days, take out the sewage from the diversion pipe to measure the total nitrogen (including ammonia nitrogen and nitrate nitrogen), and the final total nit...

Embodiment 2

[0024] Use straw as a raw material, dry it outdoors, and store it after weathering. The straw with low moisture content was put into a high-temperature-resistant airtight container, heated in a muffle furnace at 400°C for 4 hours in the absence of oxygen, and cooled naturally to room temperature to prepare biochar. The prepared biochar is pulverized, and the particle size is about 10mm. Find a water catchment area in the farmland around Beijing, mix biochar and soil at a mass ratio of about 1:4, then fill it under the reaction water catchment area, and connect a diversion pipe at the same time, so that samples can be quickly sampled by biological Sewage after charcoal treatment. When the rainy season comes, measure the ammonia nitrogen and nitrate nitrogen in the sewage flowing into the catchment area. After 30 days, take out the sewage from the diversion pipe to measure the total nitrogen (including ammonia nitrogen and nitrate nitrogen), and the final total nitrogen removal...

Embodiment 3

[0026] Use straw as a raw material, dry it outdoors, and store it after weathering. The straw with low moisture content was put into a high-temperature-resistant airtight container, heated in a muffle furnace at 500 °C for 6 hours in the absence of oxygen, and naturally cooled to room temperature to prepare biochar. The prepared biochar is pulverized, and the particle size is about 10mm. Find a water catchment area in the farmland around Beijing, mix biochar and soil at a mass ratio of about 1:4, then fill it under the reaction water catchment area, and connect a diversion pipe at the same time, so that samples can be quickly sampled by biological Sewage after charcoal treatment. When the rainy season comes, measure the ammonia nitrogen and nitrate nitrogen in the sewage flowing into the catchment area. After 30 days, take out the sewage from the diversion pipe to measure the total nitrogen (including ammonia nitrogen and nitrate nitrogen), and the final total nitrogen remova...

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Abstract

A method utilizing charcoal to achieve rural non-point source pollution denitrogenating includes the steps of modifying agricultural wastes in metal ionic solution, achieving air drying for the agricultural wastes for later using, placing the agriculture wastes after air drying in a sealed stainless container, obtaining charcoal through anoxycausis, taking out and smashing the prepared charcoal, burying the charcoal under an agricultural non-point pollution waste water collecting ditch pond, and mixing soil under the ditch pond with the charcoal to enable microbes in the soil under the ditch pond to be attached on the charcoal. When rural non-point source waste water is generated, the waste water is stored in the collecting ditch pond. Accordingly, when the waste water is infiltrated into the soil, ammonia nitrogen is absorbed by the charcoal, and nitrate nitrogen is taken as a slow-release carbon source by the charcoal to achieve denitrification under the function of the microbes in the soil. According to the method utilizing charcoal to achieve rural non-point source pollution denitrogenating, raw material is extensive in source and low in price, and secondary pollution is not generated to the soil due to fact that chemical agent is not added in a whole process. In addition, the operation process is very simple, the requirement for management is low, the quantity of reform for rural local non-point source pollution devices is relatively small, and cost is low.

Description

technical field [0001] The invention relates to a method for efficiently removing total nitrogen pollution from agricultural non-point sources, and at the same time relates to a treatment method for agricultural waste, in particular to a method for removing nitrogen from non-point source pollution in rural areas by using biochar. Background technique [0002] With the development of China's economy, people are paying more and more attention to environmental issues, and non-point source pollution, as an important source of pollution, has gradually attracted people's attention. Among agricultural pollution, agricultural non-point source pollution is the most prominent, including pollution caused by chemical fertilizers and pesticides, livestock and poultry breeding, and pollution caused by domestic wastewater. Agricultural non-point source pollution has had a serious impact on the surrounding environment and people's lives. According to the "First National Survey Report on Pol...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/28
Inventor 左剑恶刘峰林杨波邢薇王佩
Owner TSINGHUA UNIV
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