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Characteristics of Activated Sludge in an Anoxic Baffled Reactor
Author(s) -
Wu Huifang,
Sun Jian,
Kong Huoliang,
Wang Shihe,
Deng Feng
Publication year - 2013
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201100290
Subject(s) - biosorption , biodegradation , anoxic waters , activated sludge , methylene blue , chemistry , nuclear chemistry , pulp and paper industry , wastewater , chromatography , environmental chemistry , environmental engineering , environmental science , adsorption , organic chemistry , sorption , photocatalysis , engineering , catalysis
This study characterized sludge from an anoxic baffled reactor (ABR) used to treat textile dyeing wastewater. The process was run over 150 days. On day 152, five sludge samples were collected from compartments 1–5 of the ABR and a set of captive tests was conducted to investigate their particle size distributions (PSDs), dye biosorption and biodegradation properties, and dehydrogenase activity (DHA). The results indicated that the PSD of the five sludge samples from the ABR were similar. Methylene blue biosorption to the sludge samples followed the pseudo‐second‐order kinetic model and the actual biosorption process was controlled by external and intraparticle diffusion, simultaneously. After the sludge samples were cultivated for 24 h, the acid red GR dye removal efficiencies were 59.5, 68.3, 76.4, 61.5, and 65.4%, respectively. Eliminating dye biosorption, the dye biodegradation efficiencies were only 38.8, 46.3, 52.6, 48.3, and 46.0%, respectively. Furthermore, the DHA values were 28.2, 45.3, 56.5, 41.0, and 35.0 µg TF mL −1 h −1 , respectively, and the DHA variation was in accordance with the dye biodegradation efficiency variation.