氧化钙强化消落带植被厌氧消化产甲烷的探究及作用机制  

ANAEROBIC DIGESTION OF VEGETATION IN EBB ZONE ENHANCED BY CaO FOR METHANE PRODUCTION AND ITS MECHANISM

作　　者：王园媛[1] 秦晓杰[1] 牛来春[1] 樊佳奇[1] WANG Yuan-yuan;QIN Xiao-jie;NIU Lai-chun;FAN Jia-qi(College of Arts and Sciences,Yunnan Normal University,Kunming 650222,China)

机构地区：[1]云南师范大学文理学院,昆明650222

出　　处：《环境工程》2020年第9期208-212,218,共6页Environmental Engineering

基　　金：云南省教育厅科学研究基金项目(2019J1096)。

摘　　要：为了探究CaO预处理对消落带植被(VE)厌氧消化产甲烷的影响,采用4种不同质量分数的CaO对VE进行中温厌氧预处理,并考察了CaO预处理后VE的厌氧消化性能。结果表明:CaO预处理能提高VE中溶解性COD的含量,降低纤维素及木质素的含量,为后续消化过程提供物质基础。当CaO投加量为3%时,甲烷最大积累量为(229.8±6.3)mL/g,显著高于其他组别。此外,CaO预处理VE组别中甲烷的体积分数随消化时间呈现上升趋势。CaO能促进挥发性脂肪酸(VFA)的积累,当CaO投加量为3%时,VFA的最大积累量为(964±45)mg/L。CaO预处理可加速VE中总悬浮固体及挥发性悬浮固体的减量率。In order to explore the effect of CaO pretreatment on anaerobic digestion of vegetation in the ebb-flow zone(VE)for methane production,four kinds of CaO with different mass fractions were used to pretreat VE at medium temperature,and the anaerobic digestibility of VE after CaO pretreatment was investigated.The experimental results showed that CaO pretreatment increased the content of soluble COD in VE,reduced the content of cellulose and lignin,and provided material basis for subsequent digestion process.When CaO dosage was 3%,the maximum methane accumulation was(229.8±6.3)mL/g,which was significantly higher than other groups.In addition,the volume fraction of methane in VE group pretreated with CaO increased with digestion time.CaO could promote the accumulation of volatile fatty acids(VFA).When the dosage of CaO was 3%,the maximum accumulation of VFA was(964±45)mg/L.CaO pretreatment accelerated the reduction of total suspended solids and volatile suspended solids in VE.

关 键 词：消落带植被 厌氧消化 甲烷 氧化钙 

分 类 号：X524[环境科学与工程—环境工程]