Life cycle assessment of microalgae production in a raceway pond with alternative culture media

Schneider, Rosana de Cássia de Souza; Lima, Marcelo de Moura; Hoeltz, Michele; Neves, Fábio de Farias; John, Danielle Kochenborger; Azevedo, Amaro de

doi:10.1016/j.algal.2018.04.012

Cited by 75 publications

(25 citation statements)

References 66 publications

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“…Studies have depicted that algae-based biofuels are more environmentally friendly when compared to fossil fuels but in the aspect of economics, it is not viable for large-scale production with existing technologies [49]. Schneider et al [10] performed experiments on Desmodesmus subspicatus microalgae biomass in 10 days using an open raceway pond with culture movement by an air-lift system. The algae cultivation was performed using (1) wastewater and (2) Nitrogen-Phosphorus-Potassium (NPK) medium as source of nutrients.…”

Section: Environmental Impacts Of Microalgaementioning

confidence: 99%

“…Many scenarios were inspected to optimize the environmental impacts of both the methods and nutrient medium used for microalgae biomass production. It was concluded that the scenario configured to using wastewater for microalgae cultivation, followed by processing steps of centrifugation and drying, resulted in the fewest impacts [10].…”

Section: Environmental Impacts Of Microalgaementioning

confidence: 99%

“…Life cycle assessment (LCA) is one of the major aspects that needs to be considered in the production of microalgae biomass and products [10]. LCA on the basis of production pathways such as different nutrient sources (wastewater effluent, activated sludge wastewater, manure, and chemical mediums) is crucial.…”

Section: Introduction Of Microalgaementioning

confidence: 99%

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Cultivation of Oily Microalgae for the Production of Third-Generation Biofuels

et al. 2019

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Biofuel production by oleaginous microalgae is a promising alternative to the conventional fossil fuels. Many microalgae species have been investigated and deemed as potential renewable sources for the production of biofuel, biogas, food supplements and other products. Oleaginous microalgae, named for their ability to produce oil, are reported to store 30–70% of lipid content due to its metabolic properties under nutrient starvation conditions. This review presents the assortment of the research studies focused on biofuel production from oleaginous microalgae. The new methods and technologies developed for oleaginous microalgae cultivation to improve their biomass content and lipid accumulation capacity were reviewed. The production of renewable, carbon neutral, bio-based or microalgae-based transport fuels are necessary for environmental protection and economic sustainability. Microalgae are a significant source of renewable biodiesel because of their ability to produce oils in the presence of sunlight more efficiently than that of crop oils. This review will provide the background to understanding the bottlenecks and the need for improvement in the cultivation or harvesting process for oleaginous microalgae.

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Section: Environmental Impacts Of Microalgaementioning

confidence: 99%

Section: Environmental Impacts Of Microalgaementioning

confidence: 99%

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Cultivation of Oily Microalgae for the Production of Third-Generation Biofuels

et al. 2019

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“…In addition, it is difficult to control environmental variables that interfere with the cultivation process, such as precipitation, temperature and brightness . For these reasons, these systems are less efficient but very environmentally friendly using wastewater for microalgae cultivation …”

Section: Introductionmentioning

confidence: 99%

“…32 For these reasons, these systems are less efficient 33 but very environmentally friendly using wastewater for microalgae cultivation. 34 Mixed systems (open and closed) tend to increase the efficiency of microalgae cultivation by adding the advantages of the two systems and minimizing their disadvantages as well as others integrated systems with microalgae cultivation. [35][36][37] The study of these systems can lead to relevant results for nutrient removal and economic exploitation of biomass, especially if the system is developed with indigenous species.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of microalgae growth in a mixed‐type photobioreactor system for the phycoremediation of wastewater

Pacheco

Hoeltz

Bjerk

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Remediation of wastewater using microalgae is an alternative way of reducing environmental impacts associated with wastewater treatment while simultaneously generating biomass that can be converted into biofuels. In this study, the phycoremediation of a secondary urban effluent by native microalgae was investigated using a photobioreactor designed to receive carbon dioxide (CO2). The experiments were carried out with and without CO2 addition, and the physicochemical parameters of the effluent were monitored. The biomass yield was determined as the dry weight, and both the lipid and fatty acid profiles were obtained by gas chromatography with mass spectrometry detection. RESULTS With respect to biomass production, lipid content and phycoremediation of the secondary urban effluent, the best results were observed in the experiments using CO2. In these experiments, reductions of biological oxygen demand (54.34%), total phosphorus (92.4%), ammoniacal nitrogen (97.1%) and total Kjeldahl nitrogen (92.8%) were observed. The CO2 addition also enhanced microalgae growth, as the maximum cell density (MCD) was 54.26% higher after a shorter period of time compared to the MCD obtained without CO2 addition. The biomass yields were 0.5324 ± 0.007 g L−1 and 0.821 ± 0.014 g L−1 without and with CO2 addition, respectively. The lipid yields per unit of biomass for the CO2 supplemented cultures were not statistically different from cultures that were not supplemented with CO2, and the same was observed for fatty acid composition. CONCLUSION The use of the mixed‐type photobioreactor has been shown to be a potential alternative method for biomass production and wastewater phycoremediation. © 2019 Society of Chemical Industry

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Seasonal nitrogen removal in an outdoor microalgal polyculture at Nordic conditions

Mattsson,

Farnelid,

Hirwa

et al. 2024

Water Environment Research

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Microalgal solutions to clean waste streams and produce biomass were evaluated in Nordic conditions during winter, spring, and autumn in Southeast Sweden. The study investigated nitrogen (N) removal, biomass quality, and safety by treating industrial leachate water with a polyculture of local microalgae and bacteria in open raceway ponds, supplied with industrial CO2 effluent. Total N (TN) removal was higher in spring (1.5 g−2d−1), due to beneficial light conditions compared to winter and autumn (0.1 and 0.09 g−2d−1). Light, TN, and N species influenced the microalgal community (dominated by Chlorophyta), while the bacterial community remained stable throughout seasons with a large proportion of cyanobacteria. Winter conditions promoted biomass protein (19.6–26.7%) whereas lipids and carbohydrates were highest during spring (11.4–18.4 and 15.4–19.8%). Biomass toxin and metal content were below safety levels for fodder, but due to the potential presence of toxic strains, biofuels or fertilizer could be suitable applications for the algal biomass.Practitioner points Microalgal removal of nitrogen from leachate water was evaluated in Nordic conditions during winter, spring, and autumn. Total nitrogen removal was highest in spring (1.5 g−2d−1), due to beneficial light conditions for autotrophic growth. Use of local polyculture made the cultivation more stable on a seasonal (light) and short‐term (N‐species changes) scale. Toxic elements in produced algal biomass were below legal thresholds for upcycling.

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Life cycle assessment of microalgae production in a raceway pond with alternative culture media

Cited by 75 publications

References 66 publications

Cultivation of Oily Microalgae for the Production of Third-Generation Biofuels

Cultivation of Oily Microalgae for the Production of Third-Generation Biofuels

Evaluation of microalgae growth in a mixed‐type photobioreactor system for the phycoremediation of wastewater

Seasonal nitrogen removal in an outdoor microalgal polyculture at Nordic conditions

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