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The development of a highly efficient photo‐initiator system and its application in the photo‐immobilization of activated sludge
Author(s) -
Qiao Xiangli,
Li Yanming
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39838
Subject(s) - potassium persulfate , prepolymer , persulfate , acrylate , activated sludge , ethylene glycol , chemistry , chemical engineering , polymerization , benzil , polymer chemistry , materials science , nuclear chemistry , copolymer , polymer , sewage treatment , organic chemistry , polyurethane , waste management , catalysis , engineering
In this study, a highly efficient photo‐initiator system was developed, which contained potassium persulfate, N, N, N ′, N ′ ‐tetramethylethylethylenediamine plus benzil dimethyl ketal. The photo‐initiator system could successfully initiate poly (ethylene glycol) dimethyl‐acrylate prepolymer to polymerize and crosslink under the irradiation of UV rays, in the presence of concentrated activated sludge, finally leading to the formation of immobilized activate sludge pellet beads. The presence of O 2 and thickness of the reaction solution did not influence the photo‐immobilization process. Respiratory measurement result demonstrated that most activated sludge kept alive during the photo‐immobilization. Mechanical strength of the immobilized cells could be improved by optimizing contents and ratio of the initiator system. The corresponding mechanism was also discussed. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39838.