6533b830fe1ef96bd1297196
RESEARCH PRODUCT
The effect of organic loading rate and retention time on hydrogen production from a methanogenic CSTR.
Prasad KaparajuOuti PakarinenJukka Rintalasubject
Environmental EngineeringTime FactorsHydraulic retention timeHydrogenSilagechemistry.chemical_elementContinuous stirred-tank reactorBioengineeringMethanechemistry.chemical_compoundAnimal scienceBioreactorsWaste Management and Disposalta218FinlandHydrogen productionSilageRenewable Energy Sustainability and the EnvironmentEnvironmental engineeringGeneral MedicineKineticschemistryYield (chemistry)Loading rateMethaneHydrogendescription
Abstract The possibility of shifting a methanogenic process for hydrogen production by changing the process parameters viz., organic loading rate (OLR) and hydraulic retention time (HRT) was evaluated. At first, two parallel semi-continuously fed continuously stirred tank reactors (CSTR) were operated as methanogenic reactors (M1 and M2) for 78 days. Results showed that a methane yield of 198–218 L/kg volatile solids fed (VS fed ) was obtained when fed with grass silage at an OLR of 2 kgVS/m 3 /d and HRT of 30 days. After 78 days of operation, hydrogen production was induced in M2 by increasing the OLR from 2 to 10 kgVS/m 3 /d and shortening the HRT from 30 to 6 days. The highest H 2 yield of 42 L/kgVS fed was obtained with a maximum H 2 content of 24%. The present results thus demonstrate that methanogenic process can be shifted towards hydrogen production by increasing the OLR and decreasing HRT.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-05-24 | Bioresource technology |