浙江大学学报（农业与生命科学版）2025，Vol.51Issue(3)：424-436,13.DOI:10.3785/j.issn.1008-9209.2023.12.181
油脂含量对易腐垃圾资源化利用站点渗滤液厌氧消化产甲烷的影响
Influence of lipid content on methane production by anaerobic digestion of leachate from perishable waste resource utilization sites
摘要
Abstract
In response to the notable characteristics of high lipid content and substantial fluctuations in leachate from perishable waste resource utilization sites,five different lipid content gradients of perishable waste leachate were set at 1.0,2.5,5.0,10.0 and 15.0 g/L in this study to conduct an assessment to discern the influence of lipid content on methane production efficiency,substance degradation,and microbial community structure during anaerobic digestion(AD).The results revealed that within a specific concentration range,lipid content did not directly impede methane production in the leachate.As lipid content increased from 1.0 g/L to 15.0 g/L,the cumulative methane yield per unit chemical oxygen demand escalated from 81.36 mL/g to 91.29 mL/g.However,lipid degradation occurred over an extended period,with the initial 6 d primarily involving hydrolysis into long-chain fatty acids,followed by subsequent degradation into volatile fatty acids and then methane production.This prolonged degradation resulted in inadequate gas production from high-lipid-content leachate within the short retention time of 6 d and posed a risk of inhibition due to the presence of long-chain fatty acids.Moreover,lipid content significantly influenced the bacterial community structure during AD.On the 6th day of anaerobic fermentation,the relative abundance of the Oscillospiraceae family exhibited a substantial increase from 1.20%to 17.92%(P＜0.05)as lipid content escalated from 1.0 g/L to 15.0 g/L,playing a pivotal role in the degradation of leachate lipids and methane production.These findings offered crucial theoretical insights for developing technologies aimed at treating oily leachate from perishable waste resource utilization sites.关键词
易腐垃圾渗滤液/油脂含量/厌氧消化/长链脂肪酸/微生物群落结构Key words
perishable waste leachate/lipid content/anaerobic digestion/long-chain fatty acids/microbial community structure分类
资源环境引用本文复制引用
唐航,秦勇,吴伟祥..油脂含量对易腐垃圾资源化利用站点渗滤液厌氧消化产甲烷的影响[J].浙江大学学报（农业与生命科学版）,2025,51(3):424-436,13.基金项目
浙江省重点研发计划项目(2021C03024). （2021C03024）
