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Co-hydrothermal gasification of microbial sludge and algae Kappaphycus alvarezii for bio-hydrogen production: Study on aqueous phase reforming |
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| Authors: | Ramesh Sai Jayaraman Kannapan Panchamoorthy Gopinath Jayaseelan Arun Rajagopal Malolan Srikanth Adithya Pattabhiraman Srinivaasan Ajay Ramachandran Sivaramakrishnan Arivalagan Pugazhendhi |
| Affiliation: | 1. Department of Chemical Engineering, SSN College of Engineering, Kalavakkam – 603110, Chennai, Tamil Nadu, India;2. Centre for Waste Management, International Research Centre, Sathyabama Institute of Science and Technology, Jeppiaar Nagar (OMR), Chennai- 600119, Tamil Nadu, India;3. Laboratory of Cyanobacterial Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;4. School of Renewable Energy, Maejo University, Chiang Mai 50290, Thailand;5. College of Medical and Health Science, Asia University, Taichung, Taiwan |
| Abstract: | In this study, wastewater obtained from a sewage treatment plant was treated successively by using microbial consortium and macroalgae Kappaphycus alvarezii to generate microbial sludge and algal biomass. The production of green fuel was carried out via co-gasification of microbial sludge and macroalgae Kappaphycus alvarezii for a duration of 60 min, feedstock to solvent ratio (5 to 20 g of feedstock in 200 mL), sludge to algae ratio (ranging from 1:1 to 3:1) and temperature (300–400 °C) respectively. Maximum bio-hydrogen yield was 36.1% and methane yield was 38.4% at a temperature of 360 °C at a feedstock to solvent ratio of 15:200 g/mL and sludge to algae ratio of 2:1 individually. The liquid by product of co-gasification process was later subjected to photocatalytic reforming, resulted in an enhanced hydrogen composition of 61.25%. |
| Keywords: | Hydrothermal gasification Macroalgae Microbial sludge Bio-hydrogen Photo-catalytic reforming Catalyst |
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