可再生能源2024，Vol.42Issue(9)：1152-1160,9.
添加零价铁联合热预处理强化牛粪与玉米秸秆共消化过程研究
Enhancement of co-digestion of cow manure and corn straw through zero-valent iron addition and thermal pretreatment
摘要
Abstract
To address the issues of restricted hydrolysis rate and low methane production in the anaerobic digestion of agricultural waste,zero-valent iron(ZVI)with different doses(4,8,12 mg/L)and particle size(micro-scale,nano-scale)was added during digestion after thermal pretreatment to investigate its enhancement of the co-digestion of cow manure and corn straw.The research indicated that the appropriate addition of ZVI promoted both the hydrolysis-acidification and methane production processes.The maximum cumulative methane yield was achieved with the addition of 8 g/L micro-scale ZVI or 4 g/L nano-scale ZVI,which increased by 20.7% and 29.5%,respectively compared with the control group.Micro-scale and nano-scale ZVI facilitated the release of dissolved organic compounds and the conversion of propionic acid to acetic acid.Nano-scale ZVI exhibited a stronger enhancement effect on hydrolysis and acidification than micron-scale ZVI.However,excessive doses(8,12 g/L)of nano-scale ZVI had an adverse effect on methane production.ZVI promoted the enrichment of hydrolytic acidogenic bacteria and acetotrophic methanogens,such as Romb outsia,Saccharofermentans and Methanothrix,which enhanced the processes of hydrolysis-acidification and methanogenesis.关键词
零价铁/热预处理/农业废弃物/牛粪/玉米秸秆/共消化Key words
zero-valent iron/thermal pretreatment/agricultural waste/cow manure/corn straw/co-digestion分类
能源科技引用本文复制引用
常昊,尹志轩,杨晨,许玉星,刘长青,张文..添加零价铁联合热预处理强化牛粪与玉米秸秆共消化过程研究[J].可再生能源,2024,42(9):1152-1160,9.基金项目
国家重点研发计划项目(2020YFD1100303) （2020YFD1100303）
山东省省级环保产业研发项目(2060402). （2060402）
