Comparison of ultrasound and thermal pretreatment of Scenedesmus biomass on methane production

Bioresource Technology
C González-FernándezJ P Steyer

Abstract

Ultrasound at 20Hz was applied at different energy levels (Es) to treat Scenedesmus biomass, and organic matter solubilization, particle size distribution, cell disruption and biochemical methane potential were evaluated. An Es of 35.5 and 47.2MJ/kg resulted in floc deagglomeration but no improvement in methane production compared to untreated biomass. At an Es of 128.9, cell wall disruption was observed together with a 3.1-fold organic matter solubilization and an approximately 2-fold methane production in comparison with untreated biomass. Thermal pretreatment at 80°C caused cell wall disruption and improved anaerobic biodegradability 1.6-fold compared to untreated biomass. Since sonication caused a temperature increase in samples to as high as 85°C, it is likely that thermal effects accounted for much of the observed changes in the biomass. Given that ultrasound treatment at the highest Es studied only increased methane production by 1.2-fold over thermal treatment at 80°C, the higher energy requirement of sonication might not justify the use of this approach over thermal treatment.

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Citations

Nov 26, 2013·Waste Management·Kwanyong LeeKi Young Park
May 2, 2013·Biotechnology Advances·Jungmin KimJi-Won Yang
Sep 17, 2014·Bioresource Technology·Ahmed MahdyCristina González-Fernández
Jul 25, 2014·Applied Biochemistry and Biotechnology·Gwi-Taek JeongDon-Hee Park
Sep 27, 2014·Bioresource Technology·Fabiana PassosIvet Ferrer
Oct 29, 2015·Bioprocess and Biosystems Engineering·Marwa M EldalatonyByong-Hun Jeon
Jul 6, 2013·Biotechnology Advances·Sanjeev Kumar PrajapatiVirendra Kumar Vijay
Jul 24, 2012·Biotechnology Advances·Cristina González-Fernández, Mercedes Ballesteros
Oct 8, 2013·Bioresource Technology·Lara MendezCristina González-Fernández
Nov 6, 2013·Bioresource Technology·Michael D MarsolekTeodora Rutar Shuman
Apr 27, 2013·Bioresource Technology·Fabiana PassosIvet Ferrer
Jul 9, 2014·Waste Management·Fabiana PassosIvet Ferrer
Feb 27, 2015·Frontiers in Bioengineering and Biotechnology·Shuvashish BeheraSachin Kumar
Apr 24, 2016·Journal of Environmental Management·M P CaporgnoC Bengoa
Dec 18, 2014·Bioresource Technology·Andrew Ward, David Lewis
Jun 20, 2016·Journal of Hazardous Materials·Pedro Ayala-ParraJim A Field
Jul 28, 2016·Journal of Biotechnology·Viktor KlassenJan H Mussgnug
Oct 31, 2017·Applied Biochemistry and Biotechnology·Olivia CórdovaRolando Chamy
May 8, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jose Antonio MagdalenaCristina González-Fernandez
Dec 21, 2017·International Journal of Microbiology·Anna DolomanCharles D Miller
Dec 7, 2018·Biotechnology Letters·Aline de Luna MarquesMagali Christe Cammarota
Mar 14, 2021·Ecotoxicology and Environmental Safety·Suihua HuangXiangru Tang
Sep 28, 2017·Ultrasonics Sonochemistry·Zumar M A Bundhoo, Romeela Mohee

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