title: Characterization of algal organic matters of Microcystis aeruginosa: biodegradability, DBP formation and membrane fouling potential.
abstract: Algal organic matters (AOM), including extracellular organic matters (EOM) and intracellular organic matters (IOM), were comprehensively studied in terms of their biodegradability, disinfection byproduct (DBP) formation potentials and membrane fouling. EOM and IOM were fractionated into hydrophobic (HP), transphilic (TP) and hydrophilic (HL) constituents. The HP, TP and HL fractions of EOM and IOM were highly biodegradable with BDOC/DOC ranging from 52.5% to 67.4% and the DBP formation potentials followed the order of HP > TP > HL, except of IOM-HL. Biodegradable process proved very effective in removing the DBP formation potentials. Moreover, the AOM characteristics were also evaluated during ultrafiltration (UF) treatment. Results demonstrated that UF favourably remove DOC and DBP formation potential of IOM than those of EOM. And the HL constituents played a more important role in membrane fouling than HP and TP. The UF foulants exhibited higher BDOC/DOC than AOM, suggesting EOM and IOM might enhance biofouling because more biodegradable proteins and polysaccharides were found in membrane foulants. Therefore, appropriate biological treatment, ultrafiltration, or combination of the both are potential options to address these algae-caused water quality issues.
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors: Shiqing
authors: S
authors: Zhou
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; China Academy of Urban Planning & Design, Beijing 100037, China. Electronic address: yishengshao@163.com.
authors: Yisheng
authors: Y
authors: Shao
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors: Naiyun
authors: N
authors: Gao
authors: Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ 07043, United States.
authors: Yang
authors: Y
authors: Deng
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors: Lei
authors: L
authors: Li
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors: Jing
authors: J
authors: Deng
authors: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors: Chaoqun
authors: C
authors: Tan
mesh_terms: D001673:Biodegradation, Environmental; D057219:Biofouling; D004203:Disinfection / Q000379:methods*; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D046931:Microcystis / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D014462:Ultrafiltration / Q000295:instrumentation / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D008567:Membranes, Artificial
keywords: Biodegradability; Disinfection byproducts; Extracellular organic matters; Intracellular organic matters; Ultrafiltration