本文主要研究内容
作者黄浩斌（2019）在《单室空气阴极微生物燃料电池反硝化系统构建与性能研究》一文中研究指出：微生物燃料电池（Microbial Fuel Cell,MFC）是一种利用产电微生物同步去除废水中的污染物和产生电能的废水处理技术。单室MFC具有高效低成本脱氮的潜力。针对传统废水生物反硝化脱氮存在效率低和能耗大的问题,本论文以单室空气阴极MFC作为代表性的单室MFC,构建单室MFC反硝化系统,系统研究其产电性能和脱氮性能。单室MFC中同时发生产电和反硝化过程。微生物去除硝酸根和亚硝酸根的COD消耗量分别为4.33 g COD·g-1NO3--N和2.60 g COD·g-1NO2--N。当基质浓度高于微生物去除硝酸根和亚硝酸根所需基质浓度时,硝酸根和亚硝酸根导致MFC在硝酸根和亚硝酸根去除过程的电压下降,但不影响MFC在反硝化结束后的稳定电压和最大功率密度。在长期运行过程中,MFC在反硝化结束后的最大功率密度(>25 W·m-3)保持稳定。硝酸根和亚硝酸根抑制部分非产电菌的活性,减少非产电菌消耗的COD,从而可提高MFC在反硝化结束后的库仑效率。单室MFC中硝酸根和亚硝酸根均主要通过反硝化作用被还原为氮气。MFC建立性能稳定的反硝化系统所需时间随硝酸根和亚硝酸根初始浓度提高而提高。阳极初始具有产电生物膜可缩短MFC建立性能稳定的反硝化系统所需时间。闭路和开路下接种和运行的MFC（闭路组和开路组MFC）的硝酸根平均去除速率均随硝酸根初始浓度提高而提高,在2000 mg NO3--N·L-1的硝酸根初始浓度下,闭路组MFC的硝酸根平均去除速率达到12.2±0.6 kg NO3--N·m-3·d-1,高于开路组MFC(7.0±0.2 kg NO3--N·m-3·d-1)和许多传统生物反应器。闭路组和开路组MFC的亚硝酸根平均去除速率均随亚硝酸根初始浓度提高而先提高后降低。当亚硝酸根初始浓度为500 mg NO2--N·L-1时,闭路组和开路组MFC的亚硝酸根平均去除速率均达到最大值,分别为9.0±0.1和5.7±0.1 kg NO2--N·m-3·d-1。当亚硝酸根初始浓度达到1000 mg NO2--N·L-1,MFC的亚硝酸根平均去除速率随MFC运行周期数增加而持续下降,主要原因是游离亚硝酸抑制反硝化菌的活性。闭路组MFC的反硝化速率高于开路组MFC,与闭路组MFC阳极生物膜具有生物电化学还原亚硝酸根能力有关。以硝酸根为处理对象,闭路组MFC阳极微生物群落的主要产电菌和主要反硝化菌分别为Geobacter和Thauera。开路组MFC阳极微生物群落的主要反硝化菌为Azoarcus和Thauera。以亚硝酸根为处理对象,闭路组MFC阳极微生物群落的主要反硝化菌为Thauera,当亚硝酸根初始浓度不高于300 mg NO2--N·L-1和达到500 mg NO2--N·L-1时,主要产电菌分别为Geobacter和Geoalkalibacter。开路组MFC阳极微生物群落的主要反硝化菌为Azoarcus、Thauera和Paracoccus。随着硝酸根和亚硝酸根初始浓度提高,Thauera的相对丰度上升,生物量增加,Geobacter的相对丰度下降,但生物量变化不显著。Thauera易在阳极富集和来自Thauera的nirS相对丰度高也是闭路组MFC的反硝化速率高的原因。闭路组MFC中来自Geobacter、Geoalkalibacter和Thauera的导电菌毛基因的相对丰度高,说明Geobacter、Geoalkalibacter可能与Thauera通过导电菌毛建立互作关系,从而促进Thauera在MFC阳极上富集,加快MFC建立性能稳定的反硝化系统和提高MFC的反硝化速率。
Abstract
wei sheng wu ran liao dian chi （Microbial Fuel Cell,MFC）shi yi chong li yong chan dian wei sheng wu tong bu qu chu fei shui zhong de wu ran wu he chan sheng dian neng de fei shui chu li ji shu 。chan shi MFCju you gao xiao di cheng ben tuo dan de qian li 。zhen dui chuan tong fei shui sheng wu fan xiao hua tuo dan cun zai xiao lv di he neng hao da de wen ti ,ben lun wen yi chan shi kong qi yin ji MFCzuo wei dai biao xing de chan shi MFC,gou jian chan shi MFCfan xiao hua ji tong ,ji tong yan jiu ji chan dian xing neng he tuo dan xing neng 。chan shi MFCzhong tong shi fa sheng chan dian he fan xiao hua guo cheng 。wei sheng wu qu chu xiao suan gen he ya xiao suan gen de CODxiao hao liang fen bie wei 4.33 g COD·g-1NO3--Nhe 2.60 g COD·g-1NO2--N。dang ji zhi nong du gao yu wei sheng wu qu chu xiao suan gen he ya xiao suan gen suo xu ji zhi nong du shi ,xiao suan gen he ya xiao suan gen dao zhi MFCzai xiao suan gen he ya xiao suan gen qu chu guo cheng de dian ya xia jiang ,dan bu ying xiang MFCzai fan xiao hua jie shu hou de wen ding dian ya he zui da gong lv mi du 。zai chang ji yun hang guo cheng zhong ,MFCzai fan xiao hua jie shu hou de zui da gong lv mi du (>25 W·m-3)bao chi wen ding 。xiao suan gen he ya xiao suan gen yi zhi bu fen fei chan dian jun de huo xing ,jian shao fei chan dian jun xiao hao de COD,cong er ke di gao MFCzai fan xiao hua jie shu hou de ku lun xiao lv 。chan shi MFCzhong xiao suan gen he ya xiao suan gen jun zhu yao tong guo fan xiao hua zuo yong bei hai yuan wei dan qi 。MFCjian li xing neng wen ding de fan xiao hua ji tong suo xu shi jian sui xiao suan gen he ya xiao suan gen chu shi nong du di gao er di gao 。yang ji chu shi ju you chan dian sheng wu mo ke su duan MFCjian li xing neng wen ding de fan xiao hua ji tong suo xu shi jian 。bi lu he kai lu xia jie chong he yun hang de MFC（bi lu zu he kai lu zu MFC）de xiao suan gen ping jun qu chu su lv jun sui xiao suan gen chu shi nong du di gao er di gao ,zai 2000 mg NO3--N·L-1de xiao suan gen chu shi nong du xia ,bi lu zu MFCde xiao suan gen ping jun qu chu su lv da dao 12.2±0.6 kg NO3--N·m-3·d-1,gao yu kai lu zu MFC(7.0±0.2 kg NO3--N·m-3·d-1)he hu duo chuan tong sheng wu fan ying qi 。bi lu zu he kai lu zu MFCde ya xiao suan gen ping jun qu chu su lv jun sui ya xiao suan gen chu shi nong du di gao er xian di gao hou jiang di 。dang ya xiao suan gen chu shi nong du wei 500 mg NO2--N·L-1shi ,bi lu zu he kai lu zu MFCde ya xiao suan gen ping jun qu chu su lv jun da dao zui da zhi ,fen bie wei 9.0±0.1he 5.7±0.1 kg NO2--N·m-3·d-1。dang ya xiao suan gen chu shi nong du da dao 1000 mg NO2--N·L-1,MFCde ya xiao suan gen ping jun qu chu su lv sui MFCyun hang zhou ji shu zeng jia er chi xu xia jiang ,zhu yao yuan yin shi you li ya xiao suan yi zhi fan xiao hua jun de huo xing 。bi lu zu MFCde fan xiao hua su lv gao yu kai lu zu MFC,yu bi lu zu MFCyang ji sheng wu mo ju you sheng wu dian hua xue hai yuan ya xiao suan gen neng li you guan 。yi xiao suan gen wei chu li dui xiang ,bi lu zu MFCyang ji wei sheng wu qun la de zhu yao chan dian jun he zhu yao fan xiao hua jun fen bie wei Geobacterhe Thauera。kai lu zu MFCyang ji wei sheng wu qun la de zhu yao fan xiao hua jun wei Azoarcushe Thauera。yi ya xiao suan gen wei chu li dui xiang ,bi lu zu MFCyang ji wei sheng wu qun la de zhu yao fan xiao hua jun wei Thauera,dang ya xiao suan gen chu shi nong du bu gao yu 300 mg NO2--N·L-1he da dao 500 mg NO2--N·L-1shi ,zhu yao chan dian jun fen bie wei Geobacterhe Geoalkalibacter。kai lu zu MFCyang ji wei sheng wu qun la de zhu yao fan xiao hua jun wei Azoarcus、Thauerahe Paracoccus。sui zhao xiao suan gen he ya xiao suan gen chu shi nong du di gao ,Thauerade xiang dui feng du shang sheng ,sheng wu liang zeng jia ,Geobacterde xiang dui feng du xia jiang ,dan sheng wu liang bian hua bu xian zhe 。Thauerayi zai yang ji fu ji he lai zi Thauerade nirSxiang dui feng du gao ye shi bi lu zu MFCde fan xiao hua su lv gao de yuan yin 。bi lu zu MFCzhong lai zi Geobacter、Geoalkalibacterhe Thauerade dao dian jun mao ji yin de xiang dui feng du gao ,shui ming Geobacter、Geoalkalibacterke neng yu Thaueratong guo dao dian jun mao jian li hu zuo guan ji ,cong er cu jin Thauerazai MFCyang ji shang fu ji ,jia kuai MFCjian li xing neng wen ding de fan xiao hua ji tong he di gao MFCde fan xiao hua su lv 。
论文参考文献
论文详细介绍
论文作者分别是来自浙江大学的黄浩斌，发表于刊物浙江大学2019-05-20论文，是一篇关于微生物燃料电池论文,单室论文,库仑效率论文,反硝化论文,微生物群落论文,浙江大学2019-05-20论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自浙江大学2019-05-20论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：微生物燃料电池论文; 单室论文; 库仑效率论文; 反硝化论文; 微生物群落论文; 浙江大学2019-05-20论文;