Method for continuously converting kitchen waste by using three kinds of environmental insects

Abstract

The invention belongs to the technical field of ecological agriculture cycle, and discloses a method for continuously converting kitchen waste by using three kinds of environmental insects. By use ofeating and excretion characteristics of Tenebrio molitor L, Hermetia illucens L and Protaetia brevitarsis Lewis, the solid-liquid separation and impurity removal of the kitchen waste are carried out in advance, solids are crushed after addition of wheat bran to feed Tenebrio molitor L and are fully digested on that day; and after addition of Tenebrio molitor L dung, crop straw dry powder and probiotics are added for fermentation, liquids are converted by Hermetia illucens L larvae and then subjected to mixed conversion by Protaetia brevitarsis Lewis to be digested. A conversion cycle only takes 10 days, and three kinds of environmental insects and Protaetia brevitarsis Lewis larva dung, which have wide application prospects in the ecological species breeding industry, are obtained, and high-speed, efficient and high-value conversion treatment of the kitchen waste are realized. The remaining old mature larvae are processed into insect-derived protein feed after microwave drying, and areapplied to the ecological breeding industry of special economic animals, livestock and poultry; and worm dung based bio-fertilizer is prepared from Protaetia brevitarsis Lewis larva dung to be applied to the ecological planting industry.

Description

technical field [0001] The invention belongs to the technical field of ecological agricultural circulation, and in particular relates to a method for continuously transforming kitchen waste by using three kinds of environmental insects. Background technique [0002] At present, the closest existing technology: China is a large consumer group with a population of nearly 1.4 billion. According to calculations, the amount of kitchen waste generated every day is more than 60 million tons, and the amount of kitchen waste It can meet the rations of 200 million people. Kitchen waste has the dual nature of resource and pollution. How to realize the reduction, harmless and resourceful treatment of such a large amount of kitchen waste is a worldwide problem. At present, the conversion and treatment technologies of kitchen waste are mainly sanitary landfill and biological conversion. However, due to the huge amount of kitchen waste generated and limited by the resources and capacity ...

AI Technical Summary

Problems solved by technology

However, due to the huge amount of kitchen waste generated and limited by the resources and capacity of available landfill sites, sanitary landfills in various places are facing the predicament of being saturated; the rapid spread of African swine fever raging across the country and the feeding of pigs with kitchen waste There is a great relationship. The Ministry of Agriculture and Rural Affairs has explicitly prohibited feeding kitchen waste to pigs, and the direct conversion and utilization of kitchen waste to livestock and poultry is prohibited; the characteristics of high salt, high oil and high water in kitchen waste , so that the anaerobic biogas production and aerobic fertilizer production technology not only has a large front-end investment, but also has poor fermentation effect, high salt content in biogas residue and fertilizer production products, poor application effect as organic fertilizer, low product price, low user acceptance rate, etc. Disadvantages, can only rely on state subsidies to operate

Environmental insects are the scavengers of nature, with the advantages of large food intake, strong fecundity, high conversion efficiency, no secondary pollution, and resistance to intensive three-dimensional farming. At present, the more mature applications include Tenebrio molitor, black soldier fly, and white star Beetles, Periplaneta americana, etc. These insects have been used in the transformation of kitchen waste, livestock and poultry manure, and crop straw. Although some achievements have been achieved, they are limited by the characteristics of environmental insects in the industry for transforming organic waste. The degree of cognition and the mastery of insect breeding technology and organic waste conversion technology are different. Most of them use insects in a single environment to transform kitchen waste, and there are few reports on the use of insects in two environments.

The composition of kitchen waste is complex, and insects in a single environment have more or less defects such as high requirements for pretreatment conditions, long conversion cycle, incomplete conversion, and high investment costs.

[0003] To sum up, the problems existing in the existing technology are: the sanitary landfill of kitchen waste faces the dilemma of nowhere to fill, anaerobic biogas production and aerobic composting are maintained by state subsidies, and the conversion efficiency and benefit of insects in a single environment are low; The industry is limited by the degree of cognition of the characteristics of environmental insects and the mastery of the large-scale transformation of kitchen waste by environmental insects. The existing technology has not combined the three environmental insects of Tenebrio molitor, black soldier fly and white star beetle to transform and treat kitchen waste. waste

[0004] Difficulty in solving the above technical problems: the composition of kitchen waste is complex and the volume is huge

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