摘要

在这项研究中，研究了纳米塑料对纯和混合厌氧消化系统的影响。结果表明，纯厌氧消化系统中存在纳米塑料，部分抑制了醋酸杆菌的生长和代谢。混合厌氧消化系统中存在的纳米塑料也明显抑制了污水污泥的厌氧消化。混合厌氧消化系统的甲烷产率和甲烷产率均与纳米塑料浓度呈负相关。与不含纳米塑料的厌氧消化系统相比，纳米塑料浓度为0.2g / L时甲烷产量和最大日甲烷产率分别下降14.4％和40.7％。此外，通过添加纳米塑料延长了混合厌氧消化系统的启动。微生物群落结构分析表明，微生物群落结构也受到系统中存在的纳米塑性的影响。在纳米塑料浓度为0.2g / L时，Cloacamonaceae，Porphyromonadaceae，Anaerolinaceae和Gracilibacteraceae的相对丰度有所下降。相反，Anaerolinaceae，Clostridiaceae，Geobacteraceae，Dethiosulfovibrionaceae和Desulfobulbaceae的相对丰度有所改善。

In this study, impacts of nanoplastic on the pure and mixed anaerobic digestion systems were investigated. Results showed the growth and metabolism of Acetobacteroides hydrogenigenes were partly inhibited by nanoplastic existed in the pure anaerobic digestion system. The anaerobic digestion of sewage sludge was also obviously inhibited by nanoplastic existed in the mixed anaerobic digestion system. Both the methane yield and methane production rate of the mixed anaerobic digestion system showed negative correlation with the nanoplastic concentration. Compared with anaerobic digestion system without nanoplastic, methane yield and maximum daily methane yield at the nanoplastic concentration of 0.2g/L decreased for 14.4% and 40.7%, respectively. In addition, the start-up of mixed anaerobic digestion system was prolonged by addition of nanoplastic. Microbial community structure analysis indicated the microbial community structures were also affected by nanoplastic existed in the system. At the nanoplastic concentration of 0.2g/L, the relative abundances of family Cloacamonaceae, Porphyromonadaceae, Anaerolinaceae and Gracilibacteraceae decreased partly. Conversely, the relative abundances of family Anaerolinaceae, Clostridiaceae, Geobacteraceae, Dethiosulfovibrionaceae and Desulfobulbaceae improved partly.

https://www.ncbi.nlm.nih.gov/pubmed/29289007