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Nitrification via microorganism‐immobilized media using polyvinyl alcohol (PVA)
Author(s) -
Shin Dongchul,
Seo Jeongmi,
Park Chulhwi
Publication year - 2020
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12453
Subject(s) - polyvinyl alcohol , microorganism , nitrification , chemistry , activated sludge , wastewater , respiration rate , nitrifying bacteria , bioreactor , chromatography , microbiology and biotechnology , nuclear chemistry , respiration , environmental engineering , bacteria , organic chemistry , biology , nitrogen , botany , environmental science , genetics
This study was conducted to investigate the nitrification of wastewater using polyvinyl alcohol (PVA) media immobilized with nitrifying bacteria. The microorganism‐immobilized media used in this study was prepared by mixing 10% (v/v) PVA, 6% (v/v) polyethylene glycol (PEG) and nitrifying microorganism culture solution. Analysis revealed that the nitrification rate when using the microorganism‐immobilized media increased to 49.1, 80.0 and 83.9% as the filling rate increased to 5, 15 and 25%, respectively. The mass transfer rate of the prepared microorganism‐immobilized media was estimated to be 37.69 mg/L·h maximum. The respiration rate was measured in order to compare with the microorganism‐immobilized media and the conventional biological treatment process of anaerobic‐anoxic‐oxic (A 2 O). Respiration time of sludge and the media were similar, but the respiration rate of the microorganism‐immobilized media (initial 20.8 mg O 2 /(L·h)) was higher than that of the activated sludge (initial 12.4 mg O 2 /(L·h)).