title: Impact of substrates acclimation strategy on simultaneous biodegradation of hydrogen sulfide and ammonia.
abstract: Three columns were differentiated with feeding mixture of H(2)S and NH(3) (MFC), feeding NH(3) followed by H(2)S (NFC), and feeding H(2)S followed by NH(3) (SFC). Removal performance, biodegradation capacity and microbial community structures in the three columns were compared. The results show that NFC has a shorter acclimation period for the removal of NH(3) gas and nitrification than MFC. Under the high loading of H(2)S and NH(3) at 164 and 82 gm(-3) h(-1), respectively, NFC exhibited high removal efficiency of NH(3) (>95%) while the removal efficiencies were obtained at 63 and 75% in MFC and SFC, respectively. The removal of NH(3) gas in NFC was significantly attributed to nitrification (over 50%), while adsorption and chemical reaction contributed to the removal of NH(3) in MFC and SFC. The different biodegradation capacities of NH(3) could be due to the dissimilarity in the microbial population presented in each column.
authors: School of Civil and Environmental Engineering, Nanyang Technological University, Blk N1, 50 Nanyang Avenue, Singapore 639798, Singapore. JIAN0018@ntu.edu.sg
authors: Xia
authors: X
authors: Jiang
authors: Yiqun
authors: Y
authors: Luo
authors: Rong
authors: R
authors: Yan
authors: Joo Hwa
authors: JH
authors: Tay
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000378:metabolism; D000641:Ammonia / Q000737:chemistry*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods; D004247:DNA / Q000737:chemistry; D005374:Filtration; D005740:Gases / Q000378:metabolism; D006862:Hydrogen Sulfide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008829:Microbiology; D009584:Nitrogen / Q000737:chemistry; D016133:Polymerase Chain Reaction; D013696:Temperature
chemical_list: D000393:Air Pollutants; D005740:Gases; D000641:Ammonia; D004247:DNA; D009584:Nitrogen; D006862:Hydrogen Sulfide