Three-stage fermentation method of farming excrement

Abstract

The invention provides a three-level fermentation method for cultivation excrete. The method comprises the following steps that 1, pig manure or cow dung and chicken manure are mixed, water is added for adjusting the solid-liquid weight ratio, and mixture starts to be fermented at normal temperature; 2, the fermented product in the step 1 is subjected to solid-liquid separation, and biogas residue A and biogas slurry is obtained; 3, straw is thoroughly cleaned and smashed, biogas slurry in the step 2 is added into the straw for anaerobic fermentation, and biogas residue B is obtained; 4, the biogas residue A and the biogas residue B are mixed, fermentation agent is added into the mixture for high-temperature fermentation, and the fermented material is obtained. By means of the method, cultivation excrete and crop waste can be sufficiently and effectively utilized, the fermentation efficiency is high, and environmental pollution is small.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste, and in particular relates to a three-stage fermentation method for aquaculture excrement, through which the excrement of aquaculture farms can be utilized as a resource, and bio-organic fertilizer and biogas can be obtained while being effectively treated, so that Farming excrement can be harmlessly treated and effectively utilized. Background technique [0002] With the large-scale development of animal husbandry and aquaculture in my country, the pollution of livestock and poultry manure to the environment is becoming more and more serious. After long-term stacking or random discharge, it will have a serious impact on water, air, soil, human health and ecosystems. At present, a single treatment technology such as aerobic fermentation or anaerobic fermentation is adopted, the utilization rate of feces is low, many remaining problems are difficult to solve, the degree of comprehensive...