Black soldier fly larvae (Hermetia illucens) strengthen the metabolic function of food waste biodegradation by gut microbiome

Microbial Biotechnology - Tập 12 Số 3 - Trang 528-543 - 2019
Cheng‐Liang Jiang1, Wei‐Zheng Jin2, Xin‐Hua Tao1, Qian Zhang2, Jun Zhu3, Shi‐Yun Feng1, Xinhua Xu1, Hongyi Li1, Zehua Wang4, Zhijian Zhang1
1College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
2HangZhou GuSheng Biotechnology Co. Ltd, HangZhou, 311108 China
3Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
4College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China

Tóm tắt

SummaryVermicomposting using black soldier fly (BSF) larvae (Hermetia illucens) has gradually become a promising biotechnology for waste management, but knowledge about the larvae gut microbiome is sparse. In this study, 16S rRNA sequencing, SourceTracker, and network analysis were leveraged to decipher the influence of larvae gut microbiome on food waste (FW) biodegradation. The microbial community structure of BSF vermicompost (BC) changed greatly after larvae inoculation, with a peak colonization traceable to gut bacteria of 66.0%. The relative abundance of 11 out of 21 metabolic function groups in BC were significantly higher than that in natural composting (NC), such as carbohydrate‐active enzymes. In addition, 36.5% of the functional genes in BC were significantly higher than those in NC. The changes of metabolic functions and functional genes were significantly correlated with the microbial succession. Moreover, the bacteria that proliferated in vermicompost, including Corynebacterium, Vagococcus, and Providencia, had strong metabolic abilities. Systematic and complex interactions between the BSF gut and BC bacteria occurred over time through invasion, altered the microbial community structure, and thus evolved into a new intermediate niche favourable for FW biodegradation. The study highlights BSF gut microbiome as an engine for FW bioconversion, which is conducive to bioproducts regeneration from wastes.

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Microbial Biotechnology

Tập 12 Số 3

528-543

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