Method for preparing cow dung charcoal for inhibiting nitrogenous fertilizer leaching loss

Abstract

The invention discloses a method for preparing cow dung charcoal for inhibiting nitrogenous fertilizer leaching loss, and relates to a charcoal preparation method. The method comprises the following steps of pretreating cow dung, namely, collecting and drying cow dung so as to reduce the water content of cow dung to be 10-20%; preparing the charcoal, namely, preheating to keep the water content of cow dung to be about 5-8%; splitting the charcoal, namely, performing pyrolysis for 2-3 hours under anoxic condition; finally turning off a power supply control switch of a muffle furnace; cooling to be less than 80 DEG C under the condition that the door of the muffle furnace is closed; taking out a crucible utensil from the muffle furnace; putting into a drier for being cooled for later use; crushing the charcoal, namely, putting the cow dung charcoal prepared from splitting into a crushing machine for crushing, screening, and taking the cow dung charcoal of 20-40 meshes. Due to adoption of the method of applying the cow dung charcoal soil improver, the resource utilization ways of cow dung are widened, the utilization efficiency of a nitrogenous fertilizer is improved, and the environment pollution caused by nitrogenous fertilizer leaching loss is reduced.

Description

technical field

[0001] The invention relates to a method for preparing biochar, in particular to a method for preparing cow dung biochar that suppresses nitrogen fertilizer leaching. Background technique

[0002] At present, the main research and application directions of the utilization of cow dung biomass resources are: using cow dung to produce organic fertilizers, producing edible fungi, and mixing cow dung with cow urine to produce biogas, etc. However, these cow dung resource utilization methods also have deficiencies. One is the limited utilization rate of the produced cow dung, and the other is the problem of secondary pollution generated during the utilization of cow dung. According to survey statistics, only about 10% of cow dung is processed and used as agricultural fertilizers, etc., and the remaining 90% of cow dung is in a state of accumulation and storage. The accumulated cow dung not only contributes to soil, water, atmosphere, human Health has brought a new...

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