A review of the harvesting of micro-algae for biofuel production

Milledge, John J.; Heaven, S.

doi:10.1007/s11157-012-9301-z

Cited by 563 publications

(291 citation statements)

References 62 publications

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“…1). Algae cultivation for wastewater post-treatment provides a cost-effective and environmentally friendly alternative to currently used methods (Wang et al, 2010), while the use of filter feeders is viewed as an economical method for algae biomass harvest (Milledge, Heaven, 2013). Phycoremediation or the pollutant removal from wastewater by the AAFW is ensured by algal metabolism.…”

Section: General Performancementioning

confidence: 99%

“…Due to the microscopic cell size and proportion (up to 0.05%) of dry weight in the total suspension, largescale algae biomass harvest by physical and/or chemical methods is problematic (Milledge, Heaven, 2013). Instead, the artificial aquatic food-web can be used, which employs filter-feeding organisms that naturally graze on algae.…”

Section: General Performancementioning

confidence: 99%

“…Numerous studies have demonstrated that algae use for wastewater treatment is an efficient measure for reducing nutrient concentration to natural background levels (Ruiz-Marin et al, 2010;Arbib et al, 2014;Gao et al, 2016;Sutherland et al, 2014;Wang et al, 2017) and it also produces raw material for valuable substance extraction (Borowitzka, 2013). However, the high costs of algae biomass harvest is the major limitation that hampers its implementation for full-scale wastewater treatment (Milledge, Heaven, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Use of Artificial Aquatic Food-Web for Post-Treatment of Domestic Wastewater in Cold Climate: A Review

Lavrinovičs

Juhna

2017

Journal of Water Security

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Abstract. Eutrophication-promoting phosphorous loads originating from wastewater treatment plants are commonly controlled by chemical precipitation in the tertiary treatment phase. However, this approach is costly and generates additional waste. Therefore, inexpensive and sustainable methods for wastewater post-treatment are wanted. The artificial aquatic food-web that performs wastewater phycoremediation by algae and subsequent biomass harvest by filter-feeding organisms not only requires low energy consumption but also produces biomass for treatment process cost recovery. Still, the knowledge on its performance at different scales and under different climates are limited. In this review, the application possibilities of the artificial aquatic food-web for domestic wastewater post-treatment is discussed, focusing on its use in cold climate regions. Considering the reduced biological activity of aquatic organisms at low ambient temperature, possible solutions for its performance and prospect application at low temperatures are suggested. Finally, directions for future research regarding the practical use of artificial aquatic food-web are highlighted.

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Section: General Performancementioning

confidence: 99%

Section: General Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of Artificial Aquatic Food-Web for Post-Treatment of Domestic Wastewater in Cold Climate: A Review

Lavrinovičs

Juhna

2017

Journal of Water Security

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“…The harvesting of microalgae (Milledge and Heaven 2013) and the exploitation of microalgal biomass for non-fuel uses (Milledge 2011) Table 11 summarises the form of the energy outputs (heat, electricity, liquid, gaseous or solid fuel) from the various potential methods of producing useful energy from microalgae, together with the requirement for biomass drying after harvesting and the capacity to exploit the entire biomass in each case. …”

Section: Introductionmentioning

confidence: 99%

Methods of energy extraction from microalgal biomass: a review

Milledge

Heaven

2014

Rev Environ Sci Biotechnol

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“…The energy consumption for microalgae harvesting and dewatering ranges from 0.2 kWh to 8 kWh per m 3 harvesting volume depending on the technology and solid content (Milledge andHeaven, 2013, Grima et al 2013). Xu et al (2011) provides weight specific energy consumptions of 20 kWh per dry tonne of microalgae for flocculation; 26.5 kWh/t for centrifuge and 60 kWh/t for mechanical dewatering.…”

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confidence: 99%

Techno-economic assessment of CO2 bio-fixation using microalgae in connection with three different state-of-the-art power plants

Rezvani

Moheimani

Bahri

2016

Computers & Chemical Engineering

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Rezvani, S., Moheimani, N.R. and Bahri, P.A. (2016) Techno-economic assessment of CO2 bio-fixation using microalgae in connection with three different state-of-the-art power plants. Computers & Chemical Engineering, http://researchrepository.murdoch.edu.a/28750/ This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractLarge-scale microalgae cultivations for CO 2 bio-sequestration from power plants can be an alternative process to conventional technologies if the capital investments associated with carbon capture, transport and storage can be reduced or avoided. In order to counterbalance the costs required to operate massive microalgae cultivations, it is necessary to create additional revenues through biomass sales. This manuscript examines the techno-economics of microalgae cultivations for the integration with three power plant technologies using an Artificial Neural Network model. The economics are estimated using the net present value approach. The assessment is carried out at photosynthesis efficiencies ranging from 2% to 6%. The sensitivity assessment shows microalgae selling prices in the range of $440/t to $1028/t at a photosynthetic efficiency of 4% for low and high cost scenarios in order to achieve an electricity price similar to that from a conventional power plant without a CO 2 capture and storage.

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A review of the harvesting of micro-algae for biofuel production

Cited by 563 publications

References 62 publications

Use of Artificial Aquatic Food-Web for Post-Treatment of Domestic Wastewater in Cold Climate: A Review

Use of Artificial Aquatic Food-Web for Post-Treatment of Domestic Wastewater in Cold Climate: A Review

Methods of energy extraction from microalgal biomass: a review

Techno-economic assessment of CO2 bio-fixation using microalgae in connection with three different state-of-the-art power plants

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