Methane production from marine microalgae Isochrysis galbana

Santos, Nathalia O.; Oliveira, Suzana Morais de; Alves, Larissa da Silva Ferreira; Cammarota, Magali Christe

doi:10.1016/j.biortech.2014.01.091

Cited by 41 publications

(13 citation statements)

References 24 publications

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“…The most used combined pre-treatment is the thermo-chemical one, which combines high temperatures and alkali/acid use. Compared with the standard thermal pre-treatment, the thermo-chemical pre-treatment was found to have less influence on biogas production with higher cost and consumed energy [49,93,100] (Table 6). Cho et al in 2013 compared ultrasonic pre-treatments at 39, 117 and 234 kJ/g VS, alkali pre-treatment with the addition of NaOH at pH 9, 11, and 13, and thermal pre-treatment at 50, 80 and 120°C by applying each one of the pre-treatment methods on a mixture of Chlorella sp.…”

Section: Discussionmentioning

confidence: 97%

“…After shaking, the glass beads were removed, the suspension was filtered and the soluble chemical oxygen demand (CODs) was determined in the filtrate. A maximum increment of 61.7% in COD was observed for the sample treated for 1 min with beads of 1 g [49].…”

Section: Mechanical Pre-treatment Techniquementioning

confidence: 94%

“…The mechanical treatment by itself resulted in low biogas production, indicating that membrane disruption alone is not sufficient to promote anaerobic digestion but the mechanical pre-treatment increased COD solubilisation, allowing the reduction of temperature and the percentage of acid applied. A maximum methane yield of 9.27 L CH 4 /kg VS was achieved under conditions of 40°C and 0.2% acid concentration [49].…”

Section: Combined Pre-treatment Techniquementioning

confidence: 99%

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Pre-treatment techniques used for anaerobic digestion of algae

Rodríguez

Alaswad

Mooney

et al. 2015

Fuel Processing Technology

164

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Section: Discussionmentioning

confidence: 97%

Section: Mechanical Pre-treatment Techniquementioning

confidence: 94%

Section: Combined Pre-treatment Techniquementioning

confidence: 99%

See 1 more Smart Citation

Pre-treatment techniques used for anaerobic digestion of algae

Rodríguez

Alaswad

Mooney

et al. 2015

Fuel Processing Technology

164

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“…Results and discussion [16,[37][38][39][40], but Zhu and Lee [41] also showed that the TS content of unwashed samples may be as much as 20% higher than washed cells. The value for N. occulata was similar to that reported in other studies [16].…”

mentioning

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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“…However, it was revealed that biodegradability and biogas yield were enhanced at alkaline pretreatment under pH 11 and 13. Santos et al achieved 18% increase in biogas yield from Isochrysis galbana applying thermochemical pretreatment under 120°C and 2% (V:V) acidic conditions. Bohutskyi et al applied thermochemical pretreatment to 4 different types of microalgae and concluded that for Chlorella sp.…”

Section: Pretreatment Methods Applied To Microalgal Biomassmentioning

confidence: 99%

A comprehensive review on pretreatment of microalgae for biogas production

Çakmak

Uğurlu

2018

Int J Energy Res

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Summary Use of microalgal biomass for renewable energy production has gained considerable attention in the world due to increasing global energy demand and negative environmental impacts of nonrenewable fossil fuels. Anaerobic digestion is one of the renewable technologies that microalgal biomass is converted into biogas by anaerobic archea. One of the main drawbacks of using microalgal biomass for biogas production is that certain types of microalgae has rigid cell wall characteristics, which limits accessibility of anaerobic archea to microalgal intracellular organic matter during hydrolysis phase. This limitation lowers efficiency of biogas production from microalgal biomass. However, introducing pretreatment methods prior to anaerobic digestion provides disruption of rigid microalgal cell wall and improve biogas yields from microalgal biomass. The objective of this paper was to review current knowledge related to pretreatment methods applied prior to anaerobic digestion of microalgal biomass. Efficiency and applicability of pretreatment methods mainly depend on type of microalgae, cell wall characteristics, and cost and energy requirements during pretreatment process. In this review, various type of pretreatment methods applied to microalgal biomass was discussed in detail with background knowledge and literature studies in their potential on maximization of biogas yields and their cost effectiveness, which is important for large‐scale applications. In the view of current knowledge, it was concluded that each pretreatment method has a relative contribution to improvement in biogas production depending on the type of microalgae. However, energy and cost requirements are the main limitations for pretreatment. So, further studies should focus on reduction of cost and energy demand by introducing combined methods, novel chemicals, and on‐site or immobilized enzymes in pretreatment to increase feasibility of pretreatment prior to anaerobic digestion in industrial scale.

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Methane production from marine microalgae Isochrysis galbana

Cited by 41 publications

References 24 publications

Pre-treatment techniques used for anaerobic digestion of algae

Pre-treatment techniques used for anaerobic digestion of algae

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

A comprehensive review on pretreatment of microalgae for biogas production

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