Effect of temperature on low-strength wastewater treatment by UASB reactor using poly(vinyl alcohol)-gel carrier.
The feasibility of treating low-strength wastewater with an up-flow anaerobic sludge blanket (UASB) reactor, using a poly(vinyl alcohol)-gel carrier, at various temperatures and hydraulic retention times (HRTs) was examined. The temperature was decreased from 35°C to 25°C and then to 15°C. The HRT was reduced from 2.0 h to 0.22 h. The COD removal rate reached 28 kg-COD m(-3)d(-1) at 35°C, 16 kg-COD m(-3)d(-1) at 25°C, and 6 kg-COD m(-3)d(-1) at 15°C. The COD removal rate was reduced by half for each temperature reduction of 10°C.
Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan. dophuongkhanh@gmail.com
Dophuong
D
Khanh
Laiminh
L
Quan
Wenjie
W
Zhang
Daisuke
D
Hira
Kenji
K
Furukawa
D000693:Anaerobiosis; D001105:Archaea / Q000378:metabolism; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D005782:Gels / Q000737:chemistry*; D009584:Nitrogen / Q000032:analysis; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012722:Sewage / Q000382:microbiology*; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
D005782:Gels; D012722:Sewage; D011142:Polyvinyl Alcohol; D009584:Nitrogen