【作者】 张静静； 赵明星； 李超； 缪恒锋； 黄振兴； 阮文权；

【Author】 Zhang Jingjing;Zhao Mingxing;Li Chao;Miao Hengfeng;Huang Zhenxing;Ruan Wenquan;School of Environment and Civil Engineering,Jiangnan University;Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology;School of Environment,Tsinghua University;

【机构】 江南大学环境与土木工程学院； 江苏省生物质能与减碳技术工程实验室； 清华大学环境学院；

【摘要】 本文研究了聚苯乙烯(PS)微塑料对厌氧消化系统的影响。结果表明,与空白组相比,浓度低于0.2g/L的80nm和5μm PS微塑料对甲烷的累积产量影响较小。而添加0.25 g/L的80nm和5μm PS微塑料时甲烷产量分别降低了19.3%和17.9%。80nm PS微塑料对产甲烷的抑制程度比5μm PS微塑料高。实验中,所有组的pH值都稳定在6.7-7.5。挥发性脂肪酸和氨氮浓度的变化与添加PS微纳米塑料没有显著关联。进一步的研究表明,0.25 g/L的PS微塑料可以抑制厌氧消化过程的酸化和甲烷化阶段,而PS微塑料对甲烷产量的影响主要归因于对甲烷化阶段的抑制。更多还原

【Abstract】 In this study,the effect of polystyrene(PS) microplastics on the anaerobic digestion system was investigated.The results showed that the exposure to 80 nm and5μm polystyrene microplastics with the concentrations of 0.2 g/L or lower did not significantly affect the cumulative methane production.On the other hand,80 nm and5μm PS microplastic level of 0.25 g/L led to a decrease in methane production by 19.3%and 17.9%,respectively.The 80 nm PS nanoplastics therefore had slightly higher inhibition capacity on methane production than 5μm PS microplastics.The pH of all groups remained stable at 6.7–7.5.Volatile fatty acids concentration and ammonium-nitrogen concentration had no obvious relationship to PS micro and nanoplastics addition.Further investigation showed that PS micro and nanoplastics concentration of 0.25 g/L or higher could inhibit acidification and methanation stage of anaerobic digestion.However,the main negative influence of PS micro and nanoplastics on methane production was due to the severe inhibition on the methanization stage.更多还原