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Biological Hydrogen Production from Corn-Syrup Waste Using a Novel System
Civil and Environmental Engineering Department, University of Western Ontario, London, Ontario, Canada
* Author to whom correspondence should be addressed.
Received: 31 May 2009; in revised form: 10 June 2009 / Accepted: 19 June 2009 / Published: 24 June 2009
Abstract: The reported patent-pending system comprises a novel biohydrogen reactor with a gravity settler for decoupling of SRT from HRT. The biohydrogenator was operated for 100 days at 37 °C, hydraulic retention time 8 h and solids retention time ranging from 2.2–2.5 days. The feed was a corn-syrup waste generated as a byproduct from an industrial facility for bioethanol production located in southwestern Ontario, Canada. The system was initially started up with a synthetic feed containing glucose at concentration of 8 g/L and other essential inorganics. Anaerobicaly-digested sludge from the St. Mary’s wastewater treatment plant (St. Mary, Ontario, Canada) was used as the seed, and was heat treated at 70 °C for 30 min to inhibit methanogens. After 10 days, when the hydrogen production was steady, the corn-syrup waste was introduced to the system. Glucose was the main constituent in the corn-syrup; its concentration was varied over a period of 90 days from 8 to 25 g/L. The change in glucose concentration was used to study the impact of variable organic loading on the stability of hydrogen production in the biohydrogenator. Hydrogen production rate increased from 10 L H2/L·d to 34 L H2/L·d with the increase of organic loading rate (OLR) from 26 to 81 gCOD/L·d, while a maximum hydrogen yield of 430 mL H2/gCOD was achieved in the system with an overall average of 385 mL H2/gCOD.
Keywords: biohydrogenator; corn-syrup; organic loading rate
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Hafez, H.; Nakhla, G.; El Naggar, H. Biological Hydrogen Production from Corn-Syrup Waste Using a Novel System. Energies 2009, 2, 445-455.
Hafez H, Nakhla G, El Naggar H. Biological Hydrogen Production from Corn-Syrup Waste Using a Novel System. Energies. 2009; 2(2):445-455.
Hafez, Hisham; Nakhla, George; El Naggar, Hesham. 2009. "Biological Hydrogen Production from Corn-Syrup Waste Using a Novel System." Energies 2, no. 2: 445-455.