Catalytic flash pyrolysis of Monoraphidium sp. before and after lipid extraction

Delmiro, Thalita M.; Wilson, R R Y O V; Melo, D. M. A.; Viana, Graco A.C.M.; Mendes, Leonardo Brantes Bacellar; Braga, Renata Martins

doi:10.1016/j.algal.2021.102199

Cited by 16 publications

(1 citation statement)

References 32 publications

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“…Pyrolysis is a relatively uncomplicated technology requiring no complex process plant compared with incineration and gasification and it is quite environmentally friendly [52]. Additional benefits include its ability to handle many waste types [53], while directly producing several product materials (for example, biochars, bio-oils and syngas) [54,55]. In terms of the limitations of the sustainability of the pyrolysis process for a treatment alternative, the issue for wet biosolids feedstock is a problem but it has been stated recently that the introduction of low-cost pre-drying solutions can improve the outcomes, prior to pyrolysis [40].…”

Section: Benefits Of Pyrolysismentioning

confidence: 99%

Pyrolysis of Biosolids to Produce Biochars: A Review

et al. 2022

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The continuing increase in population means an increasing demand for products and services, resulting in huge amounts of waste being discharged into the environment. Therefore, waste management requires the application of new and innovative solutions. One new approach involves converting waste into value-added chemicals and products for use directly or after further processing into higher value-added products. These processes include biological, thermochemical, and physiochemical methods. Furthermore, biosolids, including treated sewage sludge (SS), represent one of the major by-products of human activities, constituting a major environmental hazard and requiring the treatment of contaminated wastewater with associated health hazards. Sustainable solutions to manage and dispose of this type of waste are required. In this review, pyrolysis, a thermochemical conversion technology, is explored to convert biosolids to biochars. The review addresses previous studies, by providing a critical discussion on the present status of biosolids processing, the potential for energy recovery from the pyrolysis bio-oil and biogas, and finally some benefits of the production of biochars from biosolids.

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Section: Benefits Of Pyrolysismentioning

confidence: 99%

Pyrolysis of Biosolids to Produce Biochars: A Review

et al. 2022

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A Review on Pyrolysis of Different Feedstocks: Effect of Catalysts and Metal Loading

Das,

Roy,

Chakraborty

et al. 2024

Lecture Notes in Mechanical Engineering

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Valorization of Monoraphidium sp. microalgal biomass for human nutrition applications

Georgiou,

Exarhopoulos,

Charisis

et al. 2024

J Appl Phycol

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The green microalga Monoraphidium sp. has potential for biodiesel production since it grows fast and can accumulate high levels of lipids. However, there is a lack of information on the potential use in human nutrition. In this work Monoraphidium sp. was characterized in terms of macronutrients with a special focus on the fatty acid profile of the lipid fraction and on the amino acid profile of the proteins. Furthermore, aiming at nutrient valorization, various methods for lipid extraction that could be used in the production of high quality and safe foods were investigated. To this end, the focus was on cell disruption methods in order to optimize oil recovery. The Monoraphidium sp. biomass had a high protein concentration (44.5 %) and a relatively low lipid concentration (12.5 %) but was rich in ω-3 fatty acids demonstrating its high nutritive value. Regarding cell disruption, ultrasonication and high-speed homogenization were insufficient to disrupt cells under the conditions examined. On the other hand, the effectiveness of the ball milling was regulated via processing time and water-to-biomass ratio and complete cell disruption could be achieved by this method. For lipid extraction, solvent extraction using a mixture of food-grade hexane and ethanol resulted in an oil recovery of 70.4 %, whereas using ethanol alone as an environmentally friendly solvent resulted in an oil recovery equal to 54 %. Supercritical CO2 extraction resulted in a lower oil recovery (25 %), whereas ethanol addition, as a cosolvent to CO2, significantly increased the oil recovery (60 %).

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Catalytic flash pyrolysis of Monoraphidium sp. before and after lipid extraction

Cited by 16 publications

References 32 publications

Pyrolysis of Biosolids to Produce Biochars: A Review

Pyrolysis of Biosolids to Produce Biochars: A Review

A Review on Pyrolysis of Different Feedstocks: Effect of Catalysts and Metal Loading

Valorization of Monoraphidium sp. microalgal biomass for human nutrition applications

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