可再生能源2016，Vol.34Issue(6)：943-948,6.
沸石对猪粪沼气发酵特性及沼渣、沼液中重金属Zn的影响
Effects of adding zeolite on pig manure anaerobic fermentation and the change of heavy metal Zinc in digestate
摘要
Abstract
The research is aimed at reducing the heavy metals pollution,so in this experiment takes pig manure as fermentation raw materials,adopting anaerobic fermentation technology to study the effects of adding exogenous zeolite on biogas production,methane content and the change of the proportion and chemical fractions of heavy metal Zinc in digestate.The results show that:Zeolite has no significant effects on gas production and methane content in biogas fermentation.After anaerobic fermentation,two groups of test of heavy metal Zinc are falling totally,adding zeolite group falls 32.41％,the falling rate is higher than that of the contrast group.After fermentation in adding zeolite group 89.88％ of heavy metals Zinc exists in biogas sludge,only 10.12％ in biogas slurry.And in the contrast group,94.53 ％ in biogas sludge,5.47％ in biogas slurry.After anaerobic fermentation of pig manure,fraction of heavy metal Zinc exists priority in the form of residual fraction,whether in biogas sludge or in biogas slurry.The heavy metal Zinc residual fraction of biogas fertilizer in adding zeolite group is higher than that in the contrast group.After anaerobic fermentation,heavy metal Zinc content in the biogas sludge is more than that in the biogas slurry,effective fraction of heavy metal Zinc content in the contrast group biogas sludge accounts for 32.63％,which is 29.12％ in adding zeolite group,furthermore,the effective fraction of biogas slurry in adding zeolite group is also lower than that of the contrast group.Thus it suggests that metal passivator is added to the anaerobic fermentation process so as to reduce the risk of heavy metals pollution after biogas fertilizer is back to the field as feitilizer.关键词
猪粪/厌氧发酵/沸石/重金属锌/含量/形态Key words
pig manure/anaerobic fermentation/zeolite/heavy metals zinc/content/fraction分类
能源科技引用本文复制引用
李轶,刘艳杰,冯洋洋,巩俊璐,张镇,谷士艳..沸石对猪粪沼气发酵特性及沼渣、沼液中重金属Zn的影响[J].可再生能源,2016,34(6):943-948,6.基金项目
国家自然科学基金青年科学基金项目(31400442) （31400442）
辽宁省自然基金面上项目(2015020635). （2015020635）
