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A solid composite microbial inoculant for the simultaneous removal of volatile organic sulfide compounds: Preparation, characterization, and its bioaugmentation of a biotrickling filter
- Chen, Dong-Zhi, Zhao, Xiang-Yu, Miao, Xiao-Ping, Chen, Jing, Ye, Jie-Xu, Cheng, Zhuo-Wei, Zhang, Shi-Han, Chen, Jian-Meng
- Journal of hazardous materials 2018 v.342 pp. 589-596
- Alcaligenes, Pseudomonas putida, bioaugmentation, biodegradation, biofilters, biotechnology, dimethyl sulfide, microbial communities, pollutants, storage quality, sulfides, volatile organic compounds, wastes
- Volatile organic sulfide compounds (VOSCs) are usually resistant to biodegradation, thereby limiting the performance of traditional biotechnology dealing with waste gas containing such pollutants especially in mixture. In this study, a solid composite microbial inoculant (SCMI) was prepared to remove dimethyl sulfide (DMS) and propanethiol (PT). Given that the DMS degradation activity of Alcaligenes sp. SY1 is inducible and the PT-degradation activity of Pseudomonas putida S-1 is constitutive, different strategies are designed for cell cultivation to obtain high VOSC removal rates of SCMI. Compared with the microbial suspension, the prepared SCMI exhibited better storage stability at 4 and 25°C. Inoculation of the SCMI in biotrickling filters (BTFs) could effectively shorten the start-up period and enhance the removal performance. Microbial analysis by Illumina MiSeq indicated that Alcaligenes sp. SY1 and P. putida S-1 might be dominant and persistent among the microbial communities of the BTF during the operation.