CAS OpenIR
Factors affecting performance and functional stratification of membrane-aerated biofilms with a counter-diffusion configuration
Li, Tinggang1; Liu, Junxin2
2019-09-17
Source PublicationRSC ADVANCES
Volume9Issue:50Pages:29337-29346
AbstractMembrane-aerated biofilms (MABs) developed with a novel counter-diffusion configuration in oxygen and substrate supply were examined for the effect of biofilm thickness on the functional activity and microbial community structure of the biofilm with the simultaneous degradation of acetonitrile, and nitrification and denitrification. Results demonstrated that different biofilm thicknesses under different surface loading rates (SLRs) caused substantially varied profiles of the microbial activities with distinct functions in the biofilm. Both thick and thin MABs achieved high-rate performance in terms of acetonitrile removal (>99%), but the performance differed in the removal efficiencies of total nitrogen (TN), which was 1.3 times higher in the thick MAB (85%) than in the thin MAB (36.3%). The specific ammonia-oxidizing rate (SAOR) and the specific acetonitrile-degrading rate (SADR) exhibited similar declining and ascending trends in both the thin and thick MABs, respectively. In contrast, the specific denitrifying rate (SDNR) was relatively uniform at a concentration near the detection limit in the thin MAB but exhibited a hump-shaped variation with the highest rate occurring in an intermediate region in the thick MAB. Microbial community analysis revealed a dramatic shift in the dominant bacteria of the community composition with low diversity across the biofilm. This study suggests that the biofilm thickness developed under SLRs, which controls the mass transfer of oxygen and substrates into biofilms, is an important factor affecting the structural and functional stratification of bacterial populations in a single MAB treating organonitrile wastewater.
DOI10.1039/c9ra03128f
Language英语
WOS KeywordGRADIENT GEL-ELECTROPHORESIS ; WASTE-WATER TREATMENT ; NITROGEN REMOVAL ; SIMULTANEOUS NITRIFICATION ; COMMUNITY STRUCTURE ; OXIDIZING BACTERIA ; REACTOR ; ACETONITRILE ; DEGRADATION ; BIOREACTOR
Funding ProjectNational Natural Science Foundation of China[50978246] ; National Natural Science Foundation of China[51138009]
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000487104200050
PublisherROYAL SOC CHEMISTRY
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/31049
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Tinggang; Liu, Junxin
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Li, Tinggang,Liu, Junxin. Factors affecting performance and functional stratification of membrane-aerated biofilms with a counter-diffusion configuration[J]. RSC ADVANCES,2019,9(50):29337-29346.
APA Li, Tinggang,&Liu, Junxin.(2019).Factors affecting performance and functional stratification of membrane-aerated biofilms with a counter-diffusion configuration.RSC ADVANCES,9(50),29337-29346.
MLA Li, Tinggang,et al."Factors affecting performance and functional stratification of membrane-aerated biofilms with a counter-diffusion configuration".RSC ADVANCES 9.50(2019):29337-29346.
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