Abstract
Nitrate contamination is a risk to human health and may cause eutrophication, whereas H2S is an undesirable constituent in biogas. In order to better understand denitrification using gaseous H2S as electron donor, this study investigated denitrification at different molar ratios of sulfur and nitrogen (S/N ratios) and H2S dosages. Although nitrate continued to decrease, a lag in sulfate generation was observed, implying the generation of sulfide oxidizing intermediates, which accumulated even though nitrate was in excess at lower S/N ratios of 0.19 and 0.38. More addition of H2S could result in a longer lag of sulfate generation. Before depletion of dissolved sulfide, denitrification could proceed with little nitrite accumulation. High throughout sequencing analysis identified two major genera, Thiobacillus and Sulfurimonas, that were responsible for autotrophic denitrification. The simultaneous removal of nitrate and H2S using a wide range of concentrations could be achieved.
References
Oct 6, 1998·Applied and Environmental Microbiology·M A DojkaN R Pace
Mar 27, 2003·International Journal of Systematic and Evolutionary Microbiology·Margarita L MiroshnichenkoElizaveta A Bonch-Osmolovskaya
Jul 28, 2004·Water Research·Jesús Reyes-AvilaJorge Gomez
Feb 3, 2006·Journal of Bacteriology·Harry R BellerDonovan P Kelly
Oct 10, 2006·Applied Microbiology and Biotechnology·Yongzhen Peng, Guibing Zhu
Jan 16, 2007·International Journal of Systematic and Evolutionary Microbiology·Shipeng LuChe Ok Jeon
Feb 14, 2007·Water Research·Reyes Sierra-AlvarezJim A Field
Aug 19, 2007·Bioresource Technology·Qaisar MahmoodJin Ren-cun
Dec 11, 2007·Bioresource Technology·Jing CaiQaisar Mahmood
Nov 8, 2008·Chemosphere·Ricardo Beristain-CardosoJ Gómez
Nov 17, 2009·Water Research·Shijie AnMehdi Nemati
Jan 6, 2010·Bioresource Technology·Cai JingQaisar Mahmood
Jan 9, 2010·Bioresource Technology·Sora ParkTaeho Lee
Jan 8, 2011·Applied Microbiology and Biotechnology·Jian-Fei LuoYong Guo
Sep 18, 2013·Chemosphere·Andrea M MontebelloDavid Gabriel
Nov 13, 2013·Chemosphere·Carmen FajardoRamón Méndez
Jan 29, 2014·Environmental Microbiology·Petra PjevacMarc Mussmann
Jul 9, 2014·Environmental Science & Technology·Alexander PoserHans-H Richnow
Aug 1, 2014·Environmental Science and Pollution Research International·Shenghui WangXia Huang
Oct 10, 2014·Bioresource Technology·Jiaoyang PuYe Liu
Oct 26, 2014·Applied Microbiology and Biotechnology·Lili ZhangJiuhui Qu
Feb 15, 2015·Biodegradation·Yuan FangYu-Yang Long
Feb 24, 2015·Applied Microbiology and Biotechnology·Petr DolejsJan Bartacek
Aug 20, 2015·Applied Microbiology and Biotechnology·Lan WangYunhong Zhang
Oct 7, 2015·Frontiers in Microbiology·Yuchen Han, Mirjam Perner
Oct 30, 2016·Bioresource Technology·Mingzi WangBilian Chen
Oct 17, 2016·Applied Microbiology and Biotechnology·Weili ZhouJung Chen Huang