Improvement of the anaerobic treatment of potato processing wastewater in a UASB reactor by co-digestion with glycerol.
The effect of three different types of glycerol on the performance of up-flow anaerobic sludge blanket (UASB) reactors treating potato processing wastewater was investigated. High COD removal efficiencies were obtained in both control and supplemented UASB reactors (around 85%). By adding 2 ml glycerol product per liter of raw wastewater, the biogas production could be increased by 0.74 l biogas ml(-1) glycerol product, which leads to energy values in the range of 810-1270 kWh(electric) per m(3) product. Moreover, a better in-reactor biomass yield was observed for the supplemented UASB reactor (0.012 g VSS g(-1) COD(removed)) compared to the UASB control (0.002 g VSS g(-1) COD(removed)), which suggests a positive effect of glycerol on the sludge blanket growth.
Laboratory of Microbial Ecology and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium.
Jingxing
J
Ma
Mariane
M
Van Wambeke
Marta
M
Carballa
Willy
W
Verstraete
D000693:Anaerobiosis; D019149:Bioreactors; D005232:Fatty Acids, Volatile / Q000378:metabolism; D005285:Fermentation; D005511:Food Handling; D005990:Glycerol / Q000378:metabolism*; D008697:Methane / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D011198:Solanum tuberosum / Q000378:metabolism; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*
D005232:Fatty Acids, Volatile; D008697:Methane; D005990:Glycerol; D010100:Oxygen