纳米Fe_(3)O_(4)对沼液MFC产电特性与有机物降解的影响  

Effect of nano-Fe_(3)O_(4) on electrical production characteristics and organic degradation of methane MFC

作　　者：李思煜 张全国[3] 王芳[1,2] 邸璐 张德俐 张志萍[3] 易维明 付鹏[1,2] LI Siyu;ZHANG Quanguo;WANG Fang;DI Lu;ZHANG Dei;ZHANG Zhiping;YI Weiming;FU Peng(College of Agricultural Engineering and Food Science,Shandong University of Technology,Zibo 255000,Shandong,China;Shandong Research Center of Engineering&Technology for Clean Energy,Zibo 255000,Shandong,China;Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs,Henan Agricultural University,Zhengzhou 450002,Henan,China)

机构地区：[1]山东理工大学农业工程与食品科学学院,山东淄博255000 [2]山东省清洁能源工程技术研究中心,山东淄博255000 [3]农业部农村可再生能源新材料与装备重点实验室河南农业大学,河南郑州450002

出　　处：《精细化工》2023年第12期2762-2771,共10页Fine Chemicals

基　　金：国家重点研发计划项目(2018YFE0206600);国家自然科学基金项目(52206225,52130610,52106258);山东省高等学校“青创科技支持计划”项目(2021KJ097)。

摘　　要：为了提高微生物燃料电池(MFC)对沼液中有机质的降解和产电效率,将纳米Fe_(3)O_(4)与MFC结合,考察了纳米Fe_(3)O_(4)以Fe_(3)O_(4)@生物炭和Fe_(3)O_(4)@碳毡两种不同介入方式对MFC性能的影响。结果表明,两种方式均可成功启动MFC,且产电效率远高于无纳米Fe_(3)O_(4)介入的空白实验,最高电压分别为699和707 mV,最高电压持续时间均可长达10 d。Fe_(3)O_(4)@碳毡与Fe_(3)O_(4)@生物炭介入下,MFC最大功率密度分别为700和578 mW/m^(2),比未使用纳米Fe_(3)O_(4)的MFC提高了43%和31%。将Fe_(3)O_(4)@碳毡作为阳极电极得到的化学需氧量(COD)降解率最高,为51.76%;直接投加Fe_(3)O_(4)@生物炭对NH_(4)^(+)-N的降解影响最大,投加Fe_(3)O_(4)@生物炭后NH_(4)^(+)-N含量由(6800.14±57.86)mg/L降至(689.14±37.29)mg/L,NH_(4)^(+)-N降解率达到89.87%。纳米Fe_(3)O_(4)参与的MFC微生物群落结构合理,两种介入方式均刺激了主要水解细菌梭菌纲(Clostridia)的生长富集。随着纳米Fe_(3)O_(4)的位置变化,Clostridia的相对丰度在以Fe_(3)O_(4)@生物炭和Fe_(3)O_(4)@碳毡介入的MFC中分别达到61.11%、50.98%。二者的电活化细菌中β-变形菌纲(Betaproteobacteria)含量最高,并且在反应后碳毡上发现了反硝化细菌芽孢八叠球菌属(Sporosarcina)。In order to improve the organic matter degradation in biogas slurry and electricity production of microbial fuel cell(MFC),nano-Fe_(3)O_(4) was combined with MFC via two different intervention methods by loading nano-Fe_(3)O_(4) on anode carbon felt(Fe_(3)O_(4)@carbon felt)and loading nano-Fe_(3)O_(4) on biochar(Fe_(3)O_(4)@biochar)into the anode chamber.The influence of these two intervention methods on the performance of MFCs were investigated.The results showed that MFC could be started by both methods,and exhibited much higher electrogeneration efficiency compared with MFC without nano-Fe_(3)O_(4) intervention.The MFC treated with Fe_(3)O_(4) showed maximum voltage of 699 and 707 mV,respectively,with the maximum voltage lasted up to 10 d.The maximum power density was increased by 43%in the Fe_(3)O_(4)@carbon felt(700 mW/m^(2))and 31%in the Fe_(3)O_(4)@biochar(578 mW/m^(2))in comparison to that MFC without Fe_(3)O_(4) nanoparticles.The highest chemical oxygen demand(COD)degradation rate(51.76%)was obtained using Fe_(3)O_(4)@carbon felt as anode electrode.Direct application of Fe_(3)O_(4)@biochar showed the greatest effect on the degradation of NH_(4)^(+)-N,with degradation rate of 89.87%,the NH_(4)^(+)-N decreased from(6800.14±57.86)mg/L to(689.14±37.29)mg/L after the application of Fe_(3)O_(4)@biochar.The microbial community structure of the MFC with the participation of nano-Fe_(3)O_(4) tended to be rationalized.Both participation methods stimulated the growth of the main hydrolytic bacteria(Clostridia).With the position of nano-Fe_(3)O_(4) changing,the relative abundance of Clostridia in the MFC with Fe_(3)O_(4)@biochar directly inputting into the anode chamber and the MFC with Fe_(3)O_(4)@carbon felt as anode electrode reached to 61.11%and 50.98%,respectively.Both had the highest content of Betaproteobacteria in electroactivation and denitrifying bacteria Sporosarcina was found on the post-reaction carbon felt.

关 键 词：沼液 MFC 纳米Fe_(3)O_(4) 有机物降解 菌群结构 水处理技术 

分 类 号：X703[环境科学与工程—环境工程] TM911.45[电气工程—电力电子与电力传动]