Psychrophilic hydrogen production from petrochemical wastewater via anaerobic sequencing batch reactor: techno-economic assessment and kinetic modelling |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan;2. Sanitary Engineering Department, Alexandria University, Alexandria 21544, Egypt;3. Water Pollution Research Department, National Research Centre, Giza 12622, Egypt;1. The Biosensor and Bioelectronics Technology Centre, King Mongkut''s University of Technology North Bangkok, 10800, Thailand;2. Department of Mechatronics Engineering, Faculty of Engineering, Rajamangala University of Technology Isan, Khonkaen Campus, 40000, Thailand;3. Department of Agro-Industrial, Food and Environmental Technology, Faculty of Applied Science, King Mongkut''s University of Technology North Bangkok, 10800, Thailand;1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, PR China;2. ERE & BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, China;3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;4. Department of Oil-Gas Field Development Engineering, College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;1. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China;2. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China |
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| 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). |
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| Keywords: | Mono-ethylene glycol Psychrophilic conditions Hydrogen yield Kinetic modelling Nitrogen demand Economic analysis |
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