Decline in extractable kitasamycin during the composting of kitasamycin manufacturing waste with dairy manure and sawdust
文献类型: 外文期刊
第一作者: Ding, Nengfei
作者: Ding, Nengfei;Liu, Chen;Fu, Qinglin;Guo, Bin;Li, Hua;Li, Ningyu;Lin, Yicheng;Li, Weidong
作者机构:
关键词: Composting;DGGE;Kitasamycin waste;Microbial community;Water-soluble nutrients
期刊名称:JOURNAL OF ENVIRONMENTAL MANAGEMENT ( 影响因子:6.789; 五年影响因子:6.914 )
ISSN: 0301-4797
年卷期: 2014 年 134 卷
页码:
收录情况: SCI
摘要: The aim of this study was to propose a feasible treatment of kitasamycin manufacturing waste by examining extractable kitasamycin and evaluating its compost maturity during the composting of waste with different ratios of dairy manure and sawdust over a 40-day period (volume/volume/volume; M1, 0/80/20; M2, 10/70/20; and M3, 30/50/20). During composting, the concentration of extractable kitasamycin in kitasamycin-contaminated composts declined rapidly, and was undetectable in M2 within 15 days. M2 also achieved the highest fertility compost, which was characterised by the following final parameters: electrical conductivity, 2.34 dS cm(-1); pH, 8.15; total C/N, 22.2; water-soluble NH4+, P, and K, 0.37, 3.43, and 1.05 g kg(-1), respectively; and plant germination index values, 92%. Furthermore, DGGE analysis showed a dramatic increase in the diversity of bacterial species during composting. In contrast, a high concentration (121 mg kg(-1)) of extractable kitasamycin still remained in the M3 compost, which exerted an inhibitory effect on the composting, resulting in reduced bacterial diversity, high values of electrical conductivity and water-soluble NH4+, a low C/N ratio, and a low plant germination index value. Furthermore, 3.86 log (CFU g(-1)) kitasamycin-resistant bacteria were still present on day 40, indicating the biological degradation contributed to the decline of extractable kitasamycin. (C) 2014 Elsevier Ltd. All rights reserved.
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