Cow dung charcoal, granular adsorbent and preparation method and application thereof

Abstract

The invention provides cow dung charcoal, a granular adsorbent and a preparation method and application thereof, and relates to the technical field of biological resource utilization. The preparationmethod for the cow dung charcoal comprises the following steps: firstly collecting fresh cow dung, naturally air-drying in natural ventilation conditions, and pyrolyzing the air-dried cow dung for 2-3h in a closed condition, successively drying and smashing the pyrolyzed cow dung, to obtain the cow dung charcoal. The cow dung charcoal prepared by the above method and the granular adsorbent further prepared by the cow dung charcoal have the good purification and absorption effects to a phosphorus-polluted water body. In addition, the preparation method for the cow dung charcoal and the granular adsorbent is simple in process, easy to operate, moderate in condition, easy to industrial production without causing secondary pollution to the environment, and capable of effectively improving utilization efficiency of biomass resources, and solving problems that agriculture and forestry wastes are difficult to degrade and recycle.

Description

technical field [0001] The invention relates to the technical field of biological resource utilization, in particular to a cow dung biochar, a granular adsorbent and a preparation method and application thereof. Background technique [0002] Phosphorus is the controlling factor of eutrophication in most lakes and freshwater systems. When the concentration of total phosphorus in water exceeds a certain range, it will cause eutrophication, cause water body function failure and further affect the sustainable development of economy and society. It can be seen that phosphorus in water is a key element that causes eutrophication in water, and the key to preventing and controlling eutrophication in water is to control the phosphorus content in water. Since Xinjiang is far away from the ocean and surrounded by tall mountains, the airflow from the ocean is not easy to reach, so the precipitation is scarce and the climate is arid, so the ecological environment is very fragile. In rec...

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Problems solved by technology

However, raw materials such as activated alumina are expensive and phosphorus is difficult to desorb. Although steel slag and fly ash are cheap, these industrial wastes will dissolve harmful ions into the water and cause secondary pollution to the environment.

[0004] At the same time, in the process of my country's economic development, a large amount of agricultural waste will be produced every year, especially the annual output of animal manure is huge, but the effective utilization rate is very low, and it is often only treated by long-term open-air stacking of manure and natural degradation. The leachate of the piled feces will pollute the groundwater with the runoff, seriously polluting the natural environment

In view of this, using animal feces as raw materials, research and development of a biochar and its adsorption particles that have a good purification and adsorption effect on phosphorus-polluted water bodies, in order to improve the utilization efficiency of biomass resources and solve the problem of agricultural and forestry biomass waste Difficult to degrade and reuse has become very necessary and urgent

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