Granulation of anaerobic sludge in the sulfate-reducing up-flow sludge bed (SRUSB) of SANI(®) process.
This study reports on anaerobic sludge granulation in a laboratory-scale sulfate-reducing up-flow sludge bed (SRUSB) in a novel sulfate reduction, autotrophic denitrification and nitrification integrated (SANI(®)) process for treatment of saline sewage. Granulation occurred in 30 d and reached full development in 90 d. The sulfate-reducing granules grew up to around 1 mm after 90 d with 21 mL/g SVI5 (sludge volume index measured after 5 min) and the biomass concentration reached 29 g/L after 4 months' operation. The reactor removed 89% chemical oxygen demand (COD) and reduced 75% sulfate within 1 h of hydraulic retention time, under a COD loading rate of up to 6.4 kg COD/(m(3) · d).
Department of Civil and Environmental Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
T
T
Hao
H
H
Lu
H K
HK
Chui
Mark C M
MC
van Loosdrecht
G H
GH
Chen
D000693:Anaerobiosis; D018533:Biomass; D019149:Bioreactors; D006863:Hydrogen-Ion Concentration; D010316:Particle Size; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D013431:Sulfates / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
D012722:Sewage; D013431:Sulfates