Cow dung fermentation method and product of cow dung

Abstract

The invention discloses a cow dung fermentation method which comprises the following steps: (1) pretreatment of cow dung: collecting the cow dung, adding a sodium chloride aqueous solution at the concentration of 8 weight percent, which is 2.2 to 2.5 times of the mass of the cow dung, stirring the cow dung and the sodium chloride aqueous solution for 20 to 25 min, and adding a disinfectant which is 20 to 30 percent of the mass of the cow dung; (2) fine treatment of the cow dung: stewing the solution obtained in the step (1) at normal temperature for 15 to 20 h, filtering the solution, concentrating filtrate till the new volume is 1/3 of the original volume, then adding 9 weight percent of urea, 3 weight percent of potassium phosphate, 3 weight percent of zinc chloride and 5 weight percentof copper sulfate, uniformly stirring the materials to obtain a cow dung solution, drying filter residues till the moisture content is 13 to 15 percent, adding a leavening agent and 30 weight percentof an ethanol aqueous solution for fermentation for 5 to 6 d, and smashing the mixture to obtain cow dung powder; (3) forming: mixing the cow dung powder obtained in the step (2) with the cow dung solution to prepare a material with a solid-liquid ratio of 1: (0.4 to 0.45), carrying out uniform stirring, and carrying out granulation through a granulator. The cow dung fermentation method has the advantages of low investment, low cost, high operability and high nutrient content.

Description

technical field [0001] The invention relates to the field of cow dung fermentation, in particular to a cow dung fermentation method and a product thereof. Background technique [0002] With the development of my country's cattle industry, large-scale breeding has become the general trend of the development of the cattle industry at this stage. Now, livestock and poultry manure, industrial sewage, and domestic sewage are listed as the three major sources of water pollution. For the special pollution source of cow dung, due to the digestion characteristics of cattle, 70% of the nutrients in the feed are excreted without digestion, and the crude protein content in cow dung is as high as 23-30%, so cow dung is a huge source of environmental pollution. , but also a huge biomass resource bank. [0003] Reasonable use of the active ingredients in cow dung to turn waste into treasure can not only eliminate environmental pollution, but also explore a path for the development of an a...

AI Technical Summary

Problems solved by technology

[0003] Reasonable use of the active ingredients in cow dung to turn waste into treasure can not only eliminate environmental pollution, but also explore a path for the development of an agricultural circular economy. Therefore, while preventing and controlling poultry farming pollution, establish a circular The concept of economic development, the efficient use of cow dung as a resource, has a good technical application prospect. In the aquaculture industry, fish meat has gradually become the main meat product that people eat because of its delicious taste and rich nutrition. Consumers pursue their goals, and the key factor affecting fish nutrition and taste quality is the quality of feed. At present, in the process of fish farming, most feeds are excessively added with hormone drugs or other additives to achieve growth. Large output, the purpose of increasing income, but this greatly affects the quality of breeding, and the quality of fish meat is difficult to guarantee. In today's pursuit of green and healthy, it is undoubtedly difficult to meet the pursuit of current consumers. Therefore, the nutrients in cow dung are used as Oriented, studied a method of fermentation of cow dung