Analysis of heavy metals in the conversion of lake sediment and restaurant waste by black soldier fly (Hermetia illucens)

被引:9
作者
Hu, Caixi [1 ]
Yang, Longyuan [2 ]
Wang, Hanlin [2 ]
Xiao, Xiaopeng [3 ]
Wang, Zhongwen [4 ]
Gong, Xiangyi [1 ]
Liu, Xianli [2 ]
Li, Wu [2 ]
机构
[1] Wuhan Univ Sci & Technol, Sch Resources & Environm Engn, Wuhan, Peoples R China
[2] Hubei Polytech Univ, Sch Environm Sci & Engn, Hubei Key Lab Mine Environm Pollut Control & Remed, Huangshi, Peoples R China
[3] Changsha Zooml Environm Ind Co Ltd, Changsha, Peoples R China
[4] Jing Brand Chizhengtang Pharmaceut Co Ltd, Hubei Prov Key Lab Qual & Safety Tradit Chinese Me, Huangshi, Peoples R China
关键词
black soldier fly; lake sediment; restaurant waste; heavy metal; utilization; DIPTERA; CADMIUM;
D O I
10.3389/fbioe.2023.1163057
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The risk posed by heavy metals makes it difficult to dispose of sediment contaminants from dredging lakes in China. Black soldier fly (Hermetia illucens) can convert organic waste, such as restaurant waste and lake sediment, to high-value-added protein feed and fertilizer. Experimental groups were formed in this study to explore the conversion of heavy metals present in the mixture of restaurant waste and lake sediment by black soldier fly larvae (BSFL). The results demonstrated that BSFL could survive in pure sediment with an 84.76% survival rate. Relative to the substrate, BSFL could accumulate 70-90% zinc (Zn), chromium (Cr), copper (Cu), and 20-40% cadmium (Cd) and lead (Pb). The experimental group 2:3, with 40% lake sediment and 60% restaurant waste, was the best group after conversion for 15 days, which showed a 95.24% survival rate of BFSL, 82.20 mg average weight of BFSL, 8.92 mm average length of BFSL, with varying content of heavy metals such as Cu (43.22 mg/kg), Zn (193.31 mg/kg), Cd (1.58 mg/kg), Cr (25.30 mg/kg) Cr, and Pb (38.59 mg/kg) in BSFL. Furthermore, the conversion residue conforms to the relevant standards of organic fertilizer in China and can be used as organic fertilizer. Overall, the present study shows that black soldier flies can improve the resource utilization of lake sediment, especially by reducing the effect of heavy metals.
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页数:11
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