@article{af88cb3ecf83416a8212f74a102811ee,
title = "Characterization and thermal decomposition of demineralized wastewater algae biomass",
abstract = "Demineralization pretreatments by leaching using different solvents including deionized water (DI-H2O), acetic acid, formic acid, and sulfuric acid were evaluated for their ash removal efficiency and effects on the physical structure, chemical composition and thermal behavior of wastewater algae biomass (WA). The apparent activation energy of the thermal decomposition (Ea) was estimated using isoconversional methods proposed by Friedman, Flynn-Wall-Ozawa, and Kissinger-Ahakira-Sunose. Dilute-acid leaching substantially reduced the ash content in WA from 40.07% dw (dry weight) to as low as 25.70% dw, with the higher heating value (HHV) considerably improved from 13.08 MJ/kg up to 15.84 MJ/kg. Leaching using formic acid was found the most effective (36.86% ash removal efficiency), while DI-H2O was the least effective (2.94% ash removal efficiency) in reducing the ash content in WA. Both formic acid and sulfuric acid treatments resulted in a decreased of Ea by 10% and 7%, respectively, while no significant change was observed with acetic acid treatment. These results suggest that selective dilute-acid leaching can improve the thermal decomposition of WA, which may benefit subsequent thermochemical conversion processes.",
keywords = "Activation energy, Ash, Demineralization, TGA, Wastewater algae",
author = "Carpio, {Rowena B.} and Yuanhui Zhang and Kuo, {Chih Ting} and Chen, {Wan Ting} and Schideman, {Lance Charles} and {de Leon}, {Rizalinda L.}",
note = "Funding Information: The main author gratefully acknowledges the financial support of DOST -SEI via the ERDT Sandwich Program (Philippines) for sponsoring living expenses while studying abroad. The Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign (USA) provided the experimental facilities and expenses for the research via USDA Multi-State Hatch funding. Appreciation also goes to Peng Zhang for his kind help, and Dr. Milagrosa R. Martinez-Goss for her help in identifying some of the algal species in the biomass. Funding Information: The main author gratefully acknowledges the financial support of DOST-SEI via the ERDT Sandwich Program (Philippines) for sponsoring living expenses while studying abroad. The Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign (USA) provided the experimental facilities and expenses for the research via USDA Multi-State Hatch funding. Appreciation also goes to Peng Zhang for his kind help, and Dr. Milagrosa R. Martinez-Goss for her help in identifying some of the algal species in the biomass. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",
year = "2019",
month = mar,
doi = "10.1016/j.algal.2018.101399",
language = "English (US)",
volume = "38",
journal = "Algal Research",
issn = "2211-9264",
publisher = "Elsevier BV",
}