Bioremediation mechanism of Monensin contaminated chicken manure by a combination of housefly larvae and Stenotrophomonas sp. DM-2

文献类型： 外文期刊

第一作者： Li, Hao

作者： Li, Hao;Wan, Qiang;Wang, Mengdong;Zhao, Jiayi;Li, Huan;Sun, Weiwei;Pan, Baoliang;Li, Jie;Li, Hao

作者机构：

关键词： Monensin; Chicken manure; Bioaugmentation; Remediation; Housefly larvae; Metabolites

期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：5.263； 五年影响因子：5.116 ）

ISSN： 2352-1864

年卷期： 2021 年 21 卷

页码：

收录情况： SCI

摘要： There is an urgent need to find efficient methods to remediate polluted manure by ionophore antibiotics (IPAs). In the present study, we tried a novel bioremediation strategy for monensin (MON, one of IPAs) contaminated chicken manure through a combined bioaugmentation-vermicomposting approach with housefly larvae and MON-degrading bacteria. Under aerobic conditions, 31.37% of MON was degraded over 12 days through bioaugmentation using only Stenotrophomonas sp. DM-2, while the degradation rate of MON was 88.15% under the combined action of the larvae and Stenotrophomonas sp. DM-2. It was found that housefly larvae activity could change the pH and temperature of chicken manure and then reshaped the microbial community structure of chicken manure substrates. This activity of larvae enhanced the abundance of MON-degrading bacterial genera (Stenotrophomonas and Alcaligenes), making the genera Pseudogracilibacillus, Pseudomonas, Oligella, and Stenotrophomonas dominant after a 12-day bioremediation period, which contributed to the marked reduction of MON in manure. A novel potential degradation pathway of MON in chicken manure was also speculated based on the identification and characterization from LC-QToF/MS spectral data of two new MON metabolic intermediates. The present study provided a novel efficient method to remediate IPAs contaminated manure and provide new insights into the microbial molecular ecological mechanisms for bioremediation of MON contaminated chicken manure. (C) 2020 Elsevier B.V. All rights reserved.

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