塑料对食物垃圾产酸发酵生产挥发性脂肪酸过程中反应器性能和微生物群落的影响。
Effects of plastics on reactor performance and microbial communities during acidogenic fermentation of food waste for production of volatile fatty acids.
机构信息
NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore 138602, Singapore; Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore 138602, Singapore.
NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore 138602, Singapore; Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore 138602, Singapore; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
出版信息
Bioresour Technol. 2021 Oct;337:125481. doi: 10.1016/j.biortech.2021.125481. Epub 2021 Jul 1.
The aim of this work was to study the effects of plastics (high-density polyethylene (HDPE), polystyrene (PS), polypropylene (PP), and polyethylene terephthalate (PET)) on reactor performance and microbial communities during acidogenic fermentation of food waste for the production of volatile fatty acids (VFA). The addition of HDPE and PS increased total VFA yields by 28% and 47%, respectively, whereas the addition of PP and PET decreased total VFA yields by 6% and 2%, respectively. The highest enhancing performance of PS could be ascribed to its highly porous structure that could provide immobilization effects for microbial growth. Degradation of various plastics was confirmed by FESEM results, but the degrees were limited (i.e., 3.9-8.7%). Bacterial analysis showed that the addition of various plastics altered the community diversity. Phylum Thermotogae and genus Defluviitoga dominated all the reactors. Potential HDPE- and PS-degrading microbes could belong to genus Clostridium_sensu_stricto_8, while Tepidanaerobacter_syntrophicus could be PET-degrading microbes.
本工作旨在研究塑料（高密度聚乙烯（HDPE）、聚苯乙烯（PS）、聚丙烯（PP）和聚对苯二甲酸乙二醇酯（PET））对食物垃圾产酸发酵生产挥发性脂肪酸（VFA）过程中反应器性能和微生物群落的影响。添加 HDPE 和 PS 分别使总 VFA 产量提高了 28%和 47%，而添加 PP 和 PET 使总 VFA 产量分别降低了 6%和 2%。PS 的最高增强性能可归因于其高度多孔的结构，可为微生物生长提供固定化作用。FESEM 结果证实了各种塑料的降解，但程度有限（即 3.9-8.7%）。细菌分析表明，各种塑料的添加改变了群落多样性。门Thermotogae 和属Defluviitoga 主导了所有反应器。潜在的 HDPE 和 PS 降解微生物可能属于梭菌属（Clostridium_sensu_stricto_8），而 Tepidanaerobacter_syntrophicus 可能是 PET 降解微生物。
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