Waste-to-BioEnergy pathway for waste activated sludge from food processing industries: An experiment on the valorization potential under CO₂ and N₂ atmospheres through microwave-induced pyrolysis

Guo, Ren Mong and Chong, William Woei Fong and Siti Aminah Mohd Nor and Ng, Jo-Han and Chong, Cheng Tung and Rubia Idris and Chiong, Meng Choung and Syieluing Wong and Bemgba Bevan Nyakuma (2022) Waste-to-BioEnergy pathway for waste activated sludge from food processing industries: An experiment on the valorization potential under CO₂ and N₂ atmospheres through microwave-induced pyrolysis. Fuel, 323. pp. 1-11. ISSN 0016-2361

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Abstract

Pyrolysis is a green and effective method for converting various waste streams into products with bio-energy potential. Waste activated sludge (WAS) from industries requires post-treatment before disposal and will cause serious pollution if not managed properly. Pyrolysis is a viable method for converting WAS into highervalue bio-products. This is the first study to use a lab-scaled microwave reactor to analyse WAS from a food processing and manufacturing company’s wastewater treatment plant. The goal is to compare bioproduct formation under various N2 and CO2 atmospheres in order to analyse the WAS waste-to-bioproduct transformation pathway. Result revealed that CO2 pyrolysis on WAS tends to: 1) increase water formation (~19 wt%), 2) produce biochar with higher energy density profit (~14%) and 3) generate gaseous products with a higher CO proportion (~50 vol%). WAS pyrolysis under N2 atmosphere showed 1) an overall better energy profit (<83.2 %), while producing 2) a higher gaseous yield (~32 wt%) with 3) higher H2 proportion (~29 vol%) and 4) biochar of larger surface area (22 m2 /g). Integrating CO2 as the pyrolysis medium utilises the excess CO2, potentially relieving the carbon burden on the environment

Item Type:	Article
Keyword:	Waste-to-BioEnergy, Microwave pyrolysis, Waste activated sludge, Food industryCO2 utilisation
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering > TD895-899 Industrial and factory sanitation > TD896-899 Industrial and factory wastes T Technology > TP Chemical technology > TP1-1185 Chemical technology > TP248.13-248.65 Biotechnology
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	13 Jun 2025 15:07
Last Modified:	13 Jun 2025 15:07
URI:	https://eprints.ums.edu.my/id/eprint/44143

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