title: Disintegration of aerobic granules induced by trans-2-decenoic acid.
abstract: One current major hurdle to practical implementation of aerobic granule technology is the frequent occurrence of granule disintegration during long-term operation. However, the mechanism behind this is largely unclear today. Here, 2-decenoic acid, which has been previously demonstrated to be released by Pseudomonas aeruginosa and disperse biofilms, was found to also induce the disintegration of aerobic granules. A comparison of the solution compositions from samples of only trans-2-decenoic acid, only aerobic granules, and granules added with trans-2-decenoic acid shows that bacteria and extracellular polymeric substances (EPS) were stripped from granule surface upon trans-2-decenoic acid dosing. Due to the possible toxicity of trans-2-decenoic acid at a saturation concentration, the disintegrated granules and the milky suspension in the disintegration test showed a significantly lower oxygen uptake rate than the un-integrated granules. This work suggests that trans-2-decenoic acid released by microbes might play a critical role in regulating the disintegration of aerobic granules.
authors.affiliation: Department of Chemistry, University of Science & Technology of China, Hefei 230026, China.
authors.forename: Pei-Jie
authors.initials: PJ
authors.lastname: Cai
authors.forename: Xiang
authors.initials: X
authors.lastname: Xiao
authors.forename: Yan-Rong
authors.initials: YR
authors.lastname: He
authors.forename: Wen-Wei
authors.initials: WW
authors.lastname: Li
authors.forename: Lei
authors.initials: L
authors.lastname: Yu
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Yu
mesh_terms: D000388:Air; D001704:Biopolymers / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry; D005229:Fatty Acids, Monounsaturated / Q000737:chemistry*; D008422:Materials Testing; D012722:Sewage / Q000737:chemistry*; D014783:Viscosity
chemical_list: D001704:Biopolymers; D003102:Colloids; D005229:Fatty Acids, Monounsaturated; D012722:Sewage; C052476:2-decenoic acid