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Characterization of microbial community and kinetics for spent sulfidic caustic applied autotrophic denitrification

Content Provider	Springer Nature Link
Author	Byun, ImGyu Park, JeungJin Park, SoRa Lee, TaeHo Park, TaeJoo
Copyright Year	2008
Abstract	Spent sulfidic caustic was applied to sulfur utilizing autotrophic denitrification as the simultaneous source of electron donor and alkalinity. The two experiment set-up of upflow anoxic hybrid growth reactor (UAHGR) and upflow anoxic suspended growth reactor (UASGR) was adopted and nitrate removals were similar in both reactors. Approximately 90% of the initial nitrate was denitrified at nitrate loading rate of 0.15∼0.40 kgNO$_{3}$ $^{−}$/m$^{3}$·d. The experimental stoichiometric ratio of sulfate production to nitrate removal was ranged from 1.5 to 2.1 mgSO$_{4}$ $^{2−}$/mgNO$_{3}$ $^{−}$. During the operation period, denaturing gradient gel electrophoresis (DGGE) analysis of polymerase chain reaction (PCR)-amplified 16S rDNA fragments for the sludge sample of both reactors showed the change of microbial communities. Thiobacillus denitrificans-like microorganism occupied 28.5% (18 clones) of the 63 clones by cloning the PCR products from the sludge sample of UAHGR. Acidovorax avenae, which can reduce nitrate to nitrogen gas while oxidizing phenol (heterotrophic denitrifier), was also found in 7 clones (11.1%). Although an organic carbon source was not added to the medium, a microorganism (Kaistella koreensis) capable of oxidizing organic compounds was found in 7 clones (11.1%). Therefore, the microbial community of spent sulfidic caustic applied autotrophic denitrification process well corresponds to the substrate components of spent sulfidic caustic. Through the batch cultivation of microorganisms in UAHGR, the microbial kinetic coefficients of spent sulfidic caustic applied autotrophic denitrification were estimated to be µ $_{ max }$ = 0.097 h$^{−1}$, k $_{ d }$ = 0.0021 h$^{−1}$, K $_{ s }$ = 200 mgNO$_{3}$ $^{−}$/L, and Y = 0.31 mgMLVSS/mgNO$_{3}$ $^{−}$.
Starting Page	96
Ending Page	101
Page Count	6
File Format	PDF
ISSN	12268372
Journal	Biotechnology and Bioprocess Engineering
Volume Number	13
Issue Number	1
e-ISSN	19763816
Language	English
Publisher	The Korean Society for Biotechnology and Bioengineering
Publisher Date	2008-03-18
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	spent sulfidic caustic autotrophic denitrification microbial community and kinetics Thiobacillus denitrificans PCR-DGGE cloning Biotechnology
Content Type	Text
Resource Type	Article
Subject	Bioengineering Biomedical Engineering Applied Microbiology and Biotechnology Biotechnology

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