Method for treating cow dung with Hermetia illucens to prepare organic fertilizer

Abstract

The invention provides a method for treating cow dung with Hermetia illucens to prepare an organic fertilizer. The method comprises the following steps: dehydrating cow dung with a dehydrater; adding swill or kitchen waste of which the addition amount is 10-15% of the mass of dehydrated cow dung; and then adding lactic acid bacteria dry powder for fermentation treatment for 1-2 days, wherein the addition amount of lactic acid bacteria dry powder is 0.1% of the mass of dehydrated cow dung; and finally adding 3-4-day old Hermetia illucens larva, culturing for 5-6 days at 30-35 DEG C under the condition that the air humidity is 75-85%, and separating out mature Hermetia illucens larva, thus obtaining an organic fertilizer. The method has the advantages of high treatment capacity, short cycle and low energy consumption in the treatment process, and can be used for realizing the resource utilization of cow dung and kitchen waste and changing waste material into things of value. In addition, since the nutritional value of cow dung is higher than that of horse dung and lactic acid bacteria are used for fermentation treatment, cow dung becomes loose and is improved in palatability, the intake rate of Hermetia illucens is increased and the yield of mature Hermetia illucens larva can be improved by 50% or above. By virtue of the method, the environment sanitation is improved and moreover organic fertilizer and bioprotein are produced; and thus, the method has a very bright application prospect.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for treating manure, in particular to a method for preparing organic fertilizer by using black soldier flies to treat cow manure. Background technique [0002] my country's livestock and poultry breeding mode has gradually shifted from individual farming to large-scale and intensive farming, and the large amount of livestock and poultry manure has become the main source of pollution in rural areas and around farms. The annual production of livestock and poultry manure in my country is almost three times the annual discharge of industrial solid waste. Improperly stacked livestock and poultry manure, or applied to farmland without normal treatment, not only seriously affects the surrounding environment, but also produces a large amount of harmful odorous gases and greenhouse gases, such as CH 4 、H 2 S, NH 3 . Moreover, the nitrogen and phosphorus elements rich ...

AI Technical Summary

Problems solved by technology

But, there is no report about the method of utilizing black soldier flies to process cow dung to prepare organic fertilizer

Cow manure is a very good organic fertilizer resource. It is different from other livestock and poultry manure. However, due to the lack of scientific understanding and insufficient development and utilization of cow manure in dairy farming communities and various dairy farms for a long time, these precious regeneration Energy is wasted in vain and not fully utilized, which is also a big economic loss for the cattle industry