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Treatment of landfill leachate by black soldier fly ( Hermetia illucens L.) larvae and the changes of intestinal microbial community

文献类型： 外文期刊

作者： Ruan, Mingjun 1 ; Li, You 3 ; Ma, Chong 4 ; Xie, Yingying 1 ; Chen, Wenying 4 ; Luo, Limei 1 ; Li, Xueling 1 ; Hu, Wenfeng 1 ; Hu, Bin 2 ;

作者机构： 1.South China Agr Univ, Coll Food Sci, Lab Appl Microbiol, Guangzhou 510642, Peoples R China

2.Guangdong Acad Agr Sci, Inst Anim Sci, State Key Lab Swine & Poultry Breeding Ind, Guangdong Key Lab Anim Breeding & Nutr, Guangzhou, Peoples R China

3.Everbright Environm Technol China Co Ltd, Nanjing 211102, Jiangsu, Peoples R China

4.Bioforte Biotechnol Shenzhen Co Ltd, Shenzhen 518118, Peoples R China

关键词： Black soldier fly larvae; Landfill leachate; Heavy metal; Microbiome; Recycling

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.0； 五年影响因子：7.9 ）

ISSN： 0301-4797

年卷期： 2024 年 360 卷

页码：

收录情况： SCI

摘要： Black soldier fly larvae (BSFL) (Hermetia illucens) are commonly used to treat organic waste. This work aims to evaluate the transformation effect, heavy metal migration, and alterations in the gut microbiota of BSFL in addition to treating landfill leachate (LL) with BSFL. We found that BSFL may grow in various landfill leachate concentrations without obvious toxicity and growth inhibition. In addition, the results indicated a significant increase in the content of ammonia nitrogen and the activity of urease and beta-glucosidase (beta-GC) in LL, increased from 2570.17 mg/L to 5853.67 mg/L, 1859.17 mg/(gd) to 517,177.98 mg/(gd), 313.73 mu g/(gh) to 441.91 mu g/(gh) respectively. Conversely, the content of total nitrogen (TN) and total organic carbon (TOC) decreased in LL, decreasing by 31.24% and 29.45% respectively. Heavy metals are accumulated in the leachate by the BSFL to differing degrees, the descending sequence of accumulation is Cd > As > Cu > Cr. As dropped by 26.0%, Cd increased by 22.6%, Cu reduced by 5.23%, and Cr increased by 317.1% in the remaining matrix. The concentration of heavy metals satisfies the organic fertilizers' limit index (NY/T1978). The diversity of intestinal microorganisms in BSFL decreased, from 2819 OTUs to 2338 OTUs, with Providencia and Morganella emerging as the core flora. The gene abundance of nitrogen metabolism in the microbiota increased significantly. The TOC, beta-GC, and Copper (Cu) content in BSFL correlated significantly with the gut microbiota. In Summary, this study revealed the treatment effect of BSFL on LL, the migration of heavy metals, and changes in the intestinal microorganisms of BSFL. The content of heavy metals in BSFL was found to be much lower than the upper limit of feed protein raw materials, demonstrating that BSFL is a sustainable method to treat LL.

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