Aerobic granulation with brewery wastewater in a sequencing batch reactor.
Aerobic granular sludge was cultivated in a sequencing batch reactor fed with brewery wastewater. After nine-week operation, stable granules with sizes of 2-7 mm were obtained. With the granulation, the SVI value decreased from 87.5 to 32 mL/g. The granular sludge had an excellent settling ability with the settling velocity over 91 m/h. Aerobic granular sludge exhibited good performance in the organics and nitrogen removal from brewery wastewater. After granulation, high and stable removal efficiencies of 88.7% COD(t), 88.9% NH(4)(+)-N were achieved at the volumetric exchange ratio of 50% and cycle duration of 6h. The average COD(t) and COD(s) of the effluent were 212 and 134 mg/L, respectively, and the average effluent ammonium concentration was less than 14.4 mg/L. Nitrogen was removed due to nitrification and simultaneous denitrification in the inner core of granules.
Wang
Shu-Guang
SG
School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. wsg@sdu.edu.cn <wsg@sdu.edu.cn>
Liu
Xian-Wei
XW
Gong
Wen-Xin
WX
Gao
Bao-Yu
BY
Zhang
Dong-Hua
DH
Yu
Han-Qing
HQ
D001420:Bacteria, Aerobic / Q000378:metabolism* / Q000648:ultrastructure; D019149:Bioreactors; D019649:Food Industry; D007220:Industrial Waste; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism; D009930:Organic Chemicals / Q000737:chemistry / Q000378:metabolism; D012722:Sewage / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation
D007220:Industrial Waste; D009930:Organic Chemicals; D012722:Sewage; D014874:Water Pollutants, Chemical; D009584:Nitrogen