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Aerobic Granulation in a Sequencing Batch Reactor for the Treatment of Piggery Wastewater
Author(s) -
Zhang Dalei,
Wang Yanan,
Li Hongwei,
Wang Shaoran,
Jing Yumei
Publication year - 2013
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143012x13560205145136
Subject(s) - granulation , wastewater , sequencing batch reactor , extracellular polymeric substance , chemical oxygen demand , chemistry , volatile suspended solids , scanning electron microscope , nitrification , nitrifying bacteria , total suspended solids , bacteria , suspended solids , batch reactor , chromatography , ammonium , sewage treatment , bioreactor , ammonia , pulp and paper industry , materials science , nitrogen , environmental engineering , biology , environmental science , biochemistry , organic chemistry , composite material , engineering , genetics , catalysis , biofilm
This study investigated the formation of aerobic granules fed with digested piggery wastewater. After 42 days of cultivation, small yellow granules with mean diameter of 0.4 mm were first observed in the reactor. Scanning electron microscope pictures showed the granules were compact, round structures with clear outer shapes and mainly composed of filamentous bacteria. Maximum chemical oxygen demand and ammonia removal ratios were 90.1 and 91.7%, respectively. The Monod equation, which was used to describe ammonium utilization, yielded a maximum rate of 6.25 mg (g volatile suspended solids) −1 h −1 . The measurement of extracellular polymeric substances (EPS) content and three‐dimensional excitation and emission matrix results showed that the EPS concentration increased during the granulation process. Fluorescence in situ hybridization analysis showed significant amounts of nitrifying bacteria in the aerobic granules. Results in this study provide insights to the treatment of piggery wastewater using aerobic granular sludge.