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Psychrophilic hydrogen production from petrochemical wastewater via anaerobic sequencing batch reactor: techno-economic assessment and kinetic modelling
Psychrophilic hydrogen production from petrochemical wastewater via anaerobic sequencing batch reactor: techno-economic assessment and kinetic modelling
Abstract Independent hydrogen production from petrochemical wastewater containing mono-ethylene glycol (MEG) via anaerobic sequencing batch reactor (ASBR) was extensively assessed under psychrophilic conditions (15–25 °C). A lab-scale ASBR was operated at pH of 5.50, and different organic loading rates (OLR) of 1.00, 1.67, 2.67, and 4.00 gCOD/L/d. The hydrogen yield (HY) progressed from 134.32 ± 10.79 to 189.09 ± 22.35 mL/gMEGinitial at increasing OLR from 1.00 to 4.00 gCOD/L/d. The maximum hydrogen content of 47.44 ± 3.60% was achieved at OLR of 4.0 gCOD/L/d, while methane content remained low (17.76 ± 1.27% at OLR of 1.0 gCOD/L/d). Kinetic studies using four different mathematical models were conducted to describe the ASBR performance. Furthermore, two batch-mode experiments were performed to optimize the nitrogen supplementation as a nutrient (C/N ratio), and assess the impact of salinity (as gNaCl/L) on hydrogen production. HY substantially dropped from 62.77 ± 4.09 to 6.02 ± 0.39 mL/gMEGinitial when C/N ratio was increased from 28.5 to 114.0. Besides, the results revealed that salinity up to 10.0 gNaCl/L has a relatively low inhibitory impact on hydrogen production. Eventually, the cost/benefit analysis showed that environmental and energy recovery revenues from ASBR were optimized at OLR of 4.0 gCOD/L/d (payback period of 7.13 yrs).
- Tokyo Institute of Technology Japan
- Alexandria University Egypt
Microsoft Academic Graph classification: Energy recovery Chemistry Sequencing batch reactor Pulp and paper industry Methane Salinity chemistry.chemical_compound Nutrient Psychrophile Anaerobic exercise Hydrogen production
Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, Condensed Matter Physics, Fuel Technology
Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, Condensed Matter Physics, Fuel Technology
Microsoft Academic Graph classification: Energy recovery Chemistry Sequencing batch reactor Pulp and paper industry Methane Salinity chemistry.chemical_compound Nutrient Psychrophile Anaerobic exercise Hydrogen production
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