CeO_(2)改性水热炭对厌氧发酵体系H_(2)S减量的研究  

CeO_(2)Modified Hydrochar and Application in H_(2)S Reduction of Anaerobic Fermentation System

作　　者：张凯 韦秀丽[1] 李平[1] 蒋滔[1] 刘科[1] ZHANG Kai;WEI Xiu-li;LI Ping;JIANG Tao;LIU Ke(Institute of Agricultural Engineering,Chongqing Academy of Agricultural Sciences,Chongqing 401329,China;College of Environment and Ecology,Chongqing University,Chongqing 400045,China)

机构地区：[1]重庆市农业科学院农业工程研究所,重庆401329 [2]重庆大学环境与生态学院,重庆400045

出　　处：《化学试剂》2022年第5期710-714,共5页Chemical Reagents

基　　金：国家重点研发计划政府间国际科技创新合作重点专项项目(2017YFE0122100);重庆市技术创新与应用发展专项重点项目(cstc2019jscx-gksbX0158);良种创新暨科技推广项目(NKY-2020AB017)。

摘　　要：以人粪渣为原料,通过微波水热法在1.8 MPa条件下制备CeO_(2)改性水热炭,研究改性水热炭对新鲜牛粪厌氧发酵过程中H_(2)S和CH_(4)产量的影响。结果表明,当CeO_(2)质量分数为30%、水热炭投加量为0.65 g/g牛粪固体时,H_(2)S的产量较未添加复合物时降低了88.09%,而CH_(4)的产生量并未发生明显变化,这可能与不同活性位点的相互竞争、正负电荷相互作用以及改性水热炭对硫的吸附、氧化和沉淀有关。由此可见,CeO_(2)/水热炭能够在不影响CH_(4)产量的情况下实现H_(2)S减量,对缓解厌氧发酵系统管道腐蚀,维持厌氧发酵系统的稳定运行具有积极影响。CeO_(2)modified hydrochar was prepared from human fecal residue by microwave hydrothermal method at 1.8 MPa.The effect of modified hydrochar on the yield of H_(2)S and CH_(4)in the anaerobic fermentation of fresh cow feces was investigated.When the dosage of hydrothermal carbon with 30%mass fraction of CeO_(2)doping was 0.65 g/g cow dung solid,the yield of H_(2)S decreased by 88.09%compared with that without complex,but the yield of CH_(4)did not change significantly.This may be related to the competition of different active sites,the interaction of positive and negative charges,and the adsorption,oxidation and precipitation of sulfur by modified hydrochar.CeO_(2)/hydrochar can reduce H_(2)S without affecting CH_(4)production,which has a positive impact on alleviating pipeline corrosion of anaerobic fermentation system and maintaining stable operation of anaerobic fermentation system.

关 键 词：CeO_(2)改性 微波水热炭 厌氧发酵 H_(2)S减量 

分 类 号：X703[环境科学与工程—环境工程]