TY - JOUR
T1 - Characterization of algal organic matters of Microcystis aeruginosa
T2 - Biodegradability, DBP formation and membrane fouling potential
AU - Zhou, Shiqing
AU - Shao, Yisheng
AU - Gao, Naiyun
AU - Deng, Yang
AU - Li, Lei
AU - Deng, Jing
AU - Tan, Chaoqun
PY - 2014/4/1
Y1 - 2014/4/1
N2 - 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.
AB - 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.
KW - Biodegradability
KW - Disinfection byproducts
KW - Extracellular organic matters
KW - Intracellular organic matters
KW - Ultrafiltration
UR - http://www.scopus.com/inward/record.url?scp=84893514218&partnerID=8YFLogxK
U2 - 10.1016/j.watres.2014.01.002
DO - 10.1016/j.watres.2014.01.002
M3 - Article
C2 - 24508915
AN - SCOPUS:84893514218
SN - 0043-1354
VL - 52
SP - 199
EP - 207
JO - Water Research
JF - Water Research
ER -