LAUSR

The black soldier fly (BSF), Hermetia illucens (Diptera: Stratiomyidae), is an insect commonly used for the bioconversion of various organic wastes. It can not only convert organic wastes into macromolecular organic substances, such as insect proteins, but also weaken the ability of these waste products to pollute, such as ammonia emissions. In this study, we measured the effects of adding fruit fermentation broth (Fer) and commercial lactic acid bacteria fermentation broth (Em) as deodorizing auxiliary substances to kitchen waste (KW) on the growth performance of black soldier fly larvae (BSFL), the intestinal flora structure of BSFL, ammonia emission of KW substrate and microbial community structure of KW substrate. We found that the addition of Fer and Em increased the body weight of BSFL after six days of culture, increasing the growth rate by 9.96% and 7.96%, respectively. The addition of Fer not only reduced the pH of the KW substrate but also increased the relative abundance of probiotics, such as Lactobacillus, Lysinibacillus, and Vagococcus, which inhibited the growth of ammonifiers such as Paenalcaligenes, Bacillus, Oligella, Pseudogracilibacillus, Paenibacillus, and Pseudomonas, resulting in the reduction of ammonia emission in the KW substrate. Besides, the addition of Fer and Em significantly increased the relative abundances of Campylobacter, Enterococcus, Ignatzschineria, Dysgonomonas, and Bacteroides in the gut of BSFL and increased the species diversity and richness in the KW substrate. Our findings provide a novel way to improve the conversion rate of organic waste and reduce the environmental pollution caused by BSF. This article is protected by copyright. All rights reserved.