Experimental study on a coupled process of production and anaerobic digestion of Chlorella vulgaris

Ras, Monique; Lardon, Laurent; Sialve, Bruno; Bernet, Nicolas; Steyer, Jean‐Philippe

doi:10.1016/j.biortech.2010.06.146

Cited by 338 publications

(169 citation statements)

References 34 publications

(33 reference statements)

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“…In turn, the yield of methane production from the microalgae biomass may reach 240-307 mL/g VS for Chlorella vulgaris and 210-261 mL/g VS for Scenedesmus sp. (Ras et al 2011;Zamalloa et al 2012;Roberts et al 2016), which was similar to our findings of 315.71 mL/g VS for the substrate consisting of Chlorella sp. and Scenedesmus sp.…”

Section: Biogas/methane Production Rate and Yield From The Substratessupporting

confidence: 92%

Anaerobic Co-digestion of the Energy Crop Sida hermaphrodita and Microalgae Biomass for Enhanced Biogas Production

et al. 2017

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This study presents the results of anaerobic codigestion of perennial crop Sida hermaphrodita and microalgae biomass under semi-continuous conditions. The aim of this study was to compare biogas potential from the silage of Sida mixed in different ratios with microalgal species of Chlorella sp. and Scenedesmus sp. The results showed that the co-digestion process improved biogas/ methane production to the level of 594.52/351.88 mL/g volatile solids. The best results were achieved when microalgae biomass constituted 40 and 60% of the substrate, and C/N ratio ranged from 14.69 to 20.61. The composition of digestates was also determined.

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Section: Biogas/methane Production Rate and Yield From The Substratessupporting

confidence: 92%

Anaerobic Co-digestion of the Energy Crop Sida hermaphrodita and Microalgae Biomass for Enhanced Biogas Production

et al. 2017

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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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“…Several studies thereafter in the later decades have confirmed that algae biomass can be anaerobically digested to produce biomethane [11]. Literature also recommends AD as a versatile technology platform which can potentially serve both industry and society in useful ways [12].…”

Section: Algae Biomass Utilization For Ad -Review Of Prospects Anmentioning

confidence: 99%

Anaerobic Digestion of Micro and Macro Algae, Pre-treatment and Co-Digestion-Biomass — A Review for a Better Practice

Paul¹,

Melville²,

Sulu³

2016

IJESD

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Abstract-Anaerobic digestion (AD) of algae biomass has been investigated since long. However to enhance full scale commercial future prospects of algal bio technology, it is important to develop methods for better utilisation of the algae biomass. For effective AD involving algae biomass, there is still a need for intensifying algae biomass digestion. Pre-treatment practices on micro and macro algae improve the digestibility of the algae biomass and an increase in biogas yield. Co-digestion of algae biomass with BWW, sewage sludge and agricultural waste is a promising sustainable strategy as it enhances AD and helps in the safe disposal of different wastes. Combining pre-treatment and co-digestion provides a better practice of the AD process. Utilisation of AD of algae biomass, and the potential of AD of algae biomass with three co-digestion feedstock -Sewage sludge, spent grain and agricultural waste are further discussed. This paper concludes that AD can act as a better 'connecting link' in the algae bio technology providing economic viability and sustainable practice.Index Terms-Anaerobic digestion, algae biomass, co-digestion, pre-treatment. I. INTRODUCTIONConversion of biomass into renewable energy has been one of the key areas of research for the past few decades. A large body of research has been published on renewable energy from algae -micro and macro, which have become a representative of biomass resources with great bio diversity and variability in their biochemical composition [1]. It becomes a sustainable option for AD due to its high presence of starch, proteins and lipids and lack of lignin [2], [3]. Developing research on algae biomass has both economic and environmental sustainability concerns which involve operational efficiency, minimization of environmental impact and socio-economic considerations [4]. To enhance full scale commercial future prospects for algal bio technology, it is then important to develop methods to enhance the valorisation of the algae biomass. AD, a spontaneous process mediated by the micro-organisms does not require cost intensive advanced dewatering or further chemical extraction processes for energy generation from the digested algae biomass. However to increase the utilization of AD involving algae biomass, current research suggests that there is still a need for optimizing algae biomass digestion [5]. Since AD involves the biological degradation of organic matter, adequate pre-treatments favouring disintegration and solubilisation of high molecular compounds can improve biomass degradability [6]. With increased biomass digestion, research reports increased methane production by digesting other organic feedstock with algae biomass by process called as co-digestion [7]. Therefore, AD can act as a ‗connecting link' in the algae biotechnology providing economic viability and sustainable practice by incorporating effective substrate pre-treatment and co-digestion practices. II. ALGAE BIOMASS UTILIZATION FOR AD -REVIEW OF PROSPECTS AND CHALLENGESBiomass as a renewable ene...

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Experimental study on a coupled process of production and anaerobic digestion of Chlorella vulgaris

Cited by 338 publications

References 34 publications

Anaerobic Co-digestion of the Energy Crop Sida hermaphrodita and Microalgae Biomass for Enhanced Biogas Production

Anaerobic Co-digestion of the Energy Crop Sida hermaphrodita and Microalgae Biomass for Enhanced Biogas Production

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

Anaerobic Digestion of Micro and Macro Algae, Pre-treatment and Co-Digestion-Biomass — A Review for a Better Practice

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