Evaluation of marine algae as a source of biogas in a two-stage anaerobic reactor system

Vergara-Fernández, Alberto; Vargas, Gisela; Alarcón, Nelson; Velasco, Ambrosio

doi:10.1016/j.biombioe.2007.10.005

Cited by 233 publications

(107 citation statements)

References 13 publications

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“…The potential for direct ethanol production appears limited, although the fermentation of starch storage products may be more favourable [5]. Research on anaerobic digestion of micro-algal biomass goes back more than 50 years [6] and the subject has been revisited a number of times since then [7][8][9][10][11][12][13]. More recently digestion has been considered as a means of improving the overall energy balance of biodiesel production [14][15][16]; as a substrate for co-digestion to improve volumetric biogas yields in digestion of less favourable substrates [17,18], or with other carbon-rich wastes [19]; or as an adjunct to wastewater treatment [20,21].…”

Section: Introductionmentioning

confidence: 99%

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

2016

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. Comparative testing of energy yields from microalgal biomass cultures processed via anaerobic digestion. Renewable Energy, 87,[744][745][746][747][748][749][750][751][752][753] http://www.sciencedirect.com/science/article/pii/S0960148115304286 doi:10.1016/j.renene.2015.11.009 __________________________________________________________________________________ Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion Keiron P. Roberts, Sonia Heaven, Charles J. Banks Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, UK (Email K.P. Roberts@soton.ac.uk, S.Heaven@soton.ac.uk, C.J.Banks@soton.ac.uk) Abstract Although digestion of micro-algal biomass was first suggested in the 1950s, there is still only limited information available for assessment of its potential. The research examined six laboratory-grown marine and freshwater micro-algae and two samples from large-scale cultivation systems. Biomass composition was characterised to allow prediction of potentially available energy using the Buswell equation, with calorific values as a benchmark for energy recovery. Biochemical methane potential tests were analysed using a pseudo-parallel first order model to estimate kinetic coefficients and proportions of readily-biodegradable carbon. Chemical composition was used to assess potential interferences from nitrogen and sulphur components. Volatile solids (VS) conversion to methane showed a broad range, from 0.161-0.435 L CH 4 g -1 VS; while conversion of calorific value ranged from 26.4-79.2%. Methane productivity of laboratory-grown species was estimated from growth rate, measured by changes in optical density in batch culture, and biomass yield based on an assumed harvested solids content. Volumetric productivity was 0.04-0.08 L CH 4 L -1 culture day -1 , the highest from the marine species Thalassiosira pseudonana. Estimated methane productivity of the large-scale raceway was lower at 0.01 L CH 4 L -1 day -1 . The approach used offers a means of screening for methane productivity per unit of cultivation under standard conditions.

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Section: Introductionmentioning

confidence: 99%

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

2016

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“…However, as a novel ''green technology" microalgae have the same potential in the CO 2 fixation from three different sources, namely, CO 2 from atmosphere, CO 2 from discharge gases from heavy metal industry, and CO 2 from soluble carbonate. Moreover, microalgae can tolerate and utilize high level of some pollutants such as nitrogen and phosphorus from the wastewater [6]. Thus, microalgae CO 2 fixation is environmentally sustainable when combined with other environmental-protecting processes, such as wastewater treatment or heavy metal removal [7].…”

Section: Introductionmentioning

confidence: 99%

Lipid Induction in Dunaliella salina Culture Aerated with Various Levels CO2 and Its Biodiesel Production

Bouaid¹

2014

J Aquac Res Development

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“…The oldest of anaerobic digestion is the sewage sludge treatment (Mata-alvarez et al, 2014). Biogas is produced from the biochemical breakdown of organic substrates by microorganisms in the absence of oxygen from the anaerobic digestion (Appels et al, 2011;Vergara-Fernández et al, 2008;Brennan and Owende, 2010;Rakmak et al, 2010). Biogas is mainly composed of methane, carbon dioxide and trace gases.…”

Section: Introductionmentioning

confidence: 99%

“…Biogas is mainly composed of methane, carbon dioxide and trace gases. Biogas application includes electricity, heating and cooking (Vergara-Fernández et al, 2008). In recent years, research into the potential feedstock for methane yield from anaerobic co-digestion has been conducted.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microwave Pretreatment on BMP of Decanter Cake from Palm Oil Mill Factory

Kaosol¹,

Rungarunanotai²

2016

American Journal of Applied Sciences

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Anaerobic digestion is an effective method for treating decanter cake in the biogas production. Decanter cake usage is limited by its slow fiber degradation for anaerobic digestion process. The aim of this study is to study the possibility of using microwave pretreatment to enhance decanter cake digestibility. The power and heating time are the parameters that influence the biogas production and methane yield. The Biochemical Methane Potential (BMP) tests are used in this study to find the optimization setting of a microwave pretreatment for decanter cake solubilization and anaerobic digestibility. The results show that the microwave pretreatment provides a better performance in terms of COD solubilization and anaerobic digestibility. The increasing power and heating time can improve the biogas production and methane yield for microwave pretreated decanter cake under anaerobic digestion process. Finally, the optimum power and heating time used in the microwave pretreatment, found in this study, is 160 watts and 8 min for methane yield under the anaerobic digestion process. The highest methane yield is 309.9 mL CH 4 /g COD removed. The microwave pretreated decanter cake at 160 watts of power and 8 min of heating time can improve the methane yield with an improvement of 24.6% in comparison with the non-microwave pretreated decanter cake. It can be concluded that the microwave pretreatment of decanter cake from palm oil mill factory could be the rapid and environmental method for biogas production enhancement.

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Evaluation of marine algae as a source of biogas in a two-stage anaerobic reactor system

Cited by 233 publications

References 13 publications

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

Lipid Induction in Dunaliella salina Culture Aerated with Various Levels CO2 and Its Biodiesel Production

Effect of Microwave Pretreatment on BMP of Decanter Cake from Palm Oil Mill Factory

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