Biological hydrogen production in a UASB reactor with granules. II: Reactor performance in 3-year operation

Biotechnology and Bioengineering
Han-Qing Yu, Yang Mu

Abstract

The experiment was conducted to evaluate the performance of an upflow anaerobic sludge blanket (UASB) with granules for H(2) production from a sucrose-rich synthetic wastewater at various substrate concentrations (5.33-28.07 g-COD/L) and hydraulic retention times (HRTs) (3-30 h) for over 3 years. The kinetics of H(2) production was evaluated, and the sludge yield and endogenous decay coefficient of the H(2)-producing granules were estimated to be 0.334 g-VSS/g-COD and 0.004/h, respectively. Based on Gibbs free energy calculations, the formation thermodynamics of caproate, an important aqueous product, were analyzed. Experimental results show that the H(2) partial pressure in biogas decreased with increasing substrate concentration, but was not sensitive to the variation of HRT in a range of 6-22 h. The H(2) production rate increased with increasing substrate concentration, but decreased with increasing HRT. The H(2) yield was in the range of 0.49-1.44 mol-H(2)/mol-glucose. Acetate, butyrate, caporate, and ethanol were the main aqueous products in the reactor, and their concentrations were dependent on both substrate concentration and HRT. An elevated substrate concentration resulted in a shift of fermentation from butyrate- to ...Continue Reading

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Citations

Apr 18, 2008·Applied Biochemistry and Biotechnology·Bo Hu, Shulin Chen
Apr 15, 2011·Bioresource Technology·Kyung-Won JungHang-Sik Shin
May 23, 2008·Biotechnology and Bioengineering·Zhen-Peng ZhangAy Su
Dec 14, 2006·Biotechnology and Bioengineering·Sasha D Hafner
Jan 31, 2019·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Liwen LuoJonathan W C Wong
Aug 24, 2019·Frontiers in Chemistry·Gabriele ScanduraGiovanni Palmisano
Nov 16, 2010·Critical Reviews in Biotechnology·Ackmez MudhooAntoni Sánchez
Aug 12, 2010·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Alessandro SpagniRoberto Farina

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