The Exploration And Industrialization Of The Biological Conversion Process Of Food Wastes By Applying Housefly Larvae

In recent years, China’s major cities have been faced with different levels of food wastes, which directly led to huge environmental risks and challenges. At the same time, the recycling efficiency of such garbage is very low while the disposal methods we’ve already got cannot solve the environmental pollution resulting from the food wastes. In order to optimize the degradation process of such wastes efficiently, and to realize the resource utilization and sustainable development, all the challenges need to be further explored.The housefly (Musca domestica.) larvae are of great importance for the biochemical reactor. Different moisture and fermentation temperature of food wastes, as well as the varied demand of the nutrients for larvae growth are been chosen to study the efficiency of such biochemical reator to degrade the kitchen rubbish. While the technology of the pilot researches are also been studied on the processing of housefly larvae, which should have been further applied to industrialization for food waste utilization. This study focuses on kitchen wastes recycling and reduction, many efforts have been made to crack the bottleneck of related industrial technology in order to find a new way to solve the environmental pollution caused by kitchen rubbish. The main results of this research are as follows:(1) The laboratory and pilot experiments were performed to verify the feasibility of food wastes degradation by housefly larvae. Under both conditions, the reduction of kitchen rubbish by housefly larva exceeded 80%, which further verified the great potential use of housefly larva to degrade such wastes.(2) A biotransformation process and its key parameters had been determined through our experiments. This study compared the variable processes of fermentation temperature considered the different moisture of food wastes. According to experiment, this study selected the suitable inoculation proportion(1.33%) and the best ratio of moisture and material on the different stages of bioconversion. These researches show that under laboratory condition, the average yield of housefly larva were 324.4g/kg and food waste reduction rate were 83.71%, while under pilot scale the two parameters were 216g/kg and 64.33%.(3) We designed and set up a housefly larva biotransformation of kitchen garbage in the test platform. Further evaluation of the platform was made for confirmation of housefly larvae feeding line in this test. This technology can be directly put into industrialization by.small optimization of the key parameters.