title: Rapid acclimation of methanogenic granular sludge into denitrifying sulfide removal granules.
abstract: Rapid formation of denitrifying sulfide removal granules is of practical interest to start up an expanded granular sludge bed reactor for wastewater treatment. This study demonstrates that methanogenic granules can be easily acclimated into DSR granules in one day, removing all 1.30 kg m(-3) d(-1) sulfide and converting >90% of 0.56 kg-Nm(-3)d(-1) nitrate into di-nitrogen gas. Under high loadings, reactor performance, however, declined. Under high loading rates, sulfide first inhibited the heterotrophic denitrifier (Caldithrix sp.), thereby accumulating nitrite in the system; the autotrophic denitrifier (Pseudomonas sp. C23) was then inhibited by accumulated nitrite, leading to breakdown of the entire DSR process.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Zhou
authors.forename: Chuan
authors.initials: C
authors.lastname: Chen
authors.forename: Aijie
authors.initials: A
authors.lastname: Wang
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Liu
authors.forename: Kuo-Ling
authors.initials: KL
authors.lastname: Ho
authors.forename: Nanqi
authors.initials: N
authors.lastname: Ren
authors.forename: Duu-Jong
authors.initials: DJ
authors.lastname: Lee
mesh_terms: D003013:Clostridium / Q000378:metabolism; D008697:Methane / Q000378:metabolism*; D009573:Nitrites / Q000378:metabolism*; D011549:Pseudomonas / Q000378:metabolism; D012722:Sewage; D013440:Sulfides / Q000302:isolation & purification*
chemical_list: D009573:Nitrites; D012722:Sewage; D013440:Sulfides; D008697:Methane