title: Role and significance of extracellular polymeric substances from granular sludge for simultaneous removal of organic matter and ammonia nitrogen.
abstract: This study analyzed the organics and content of metal ions in extracellular polymeric substances (EPSs), tightly (TB-EPSs) and loosely (LB-EPSs) bound EPSs of granular sludge with simultaneous removal of organic matters and ammonia nitrogen, studied the dynamic variation of metal ions in EPSs from granular sludge with different particle sizes and the change of zeta potential before and after cation exchange resin (CER) treatment. Results showed, with particle size increasing, the protein content gradually increased, the content of polysaccharide basically unchanged; the content of Ca, Mg, K, Na and Zn also increased, whereas others did not show a consistent regularity. The existence of metal ions reduced zeta potential of EPSs. The existence of metal ions helped to the adhesion among granules, in order to form a granule with bigger particle size.
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China. Electronic address: yanll98@163.com.
authors.forename: Lilong
authors.initials: L
authors.lastname: Yan
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wen
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Ren
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China.
authors.forename: Guoxin
authors.initials: G
authors.lastname: Hao
authors.affiliation: School of Resource and Environment, Northeast Agricultural University, Harbin 150030, China. Electronic address: zhangyinghr@hotmail.com.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000332:Aerobiosis; D000641:Ammonia / Q000302:isolation & purification*; D005591:Chemical Fractionation; D005110:Extracellular Space / Q000737:chemistry*; D007475:Ion Exchange Resins; D008903:Minerals / Q000302:isolation & purification; D009584:Nitrogen / Q000302:isolation & purification*; D009930:Organic Chemicals / Q000302:isolation & purification*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D055672:Static Electricity; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000379:methods*
chemical_list: D007475:Ion Exchange Resins; D008903:Minerals; D009930:Organic Chemicals; D011108:Polymers; D012722:Sewage; D000641:Ammonia; D009584:Nitrogen
keywords: Extracellular polymeric substances; FTIR; Granular sludge; Mineral fraction; Nitrification