Biorefinery process intensification by ultrasound and ozone for phosphorus and biocompounds recovery from microalgae

González-Balderas, Regina M.; Velásquez-Orta, Sharon B.; Ledesma, María Teresa Orta

doi:10.1016/j.cep.2020.107951

Cited by 12 publications

(2 citation statements)

References 35 publications

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“…Orthophosphate concentration did not substantially change throughout the tests, both when ultrasound and ozonation were applied alone and in the combined US-O 3 prEFF treatment, again underlining a favorable condition for agricultural reuse of the treated effluent. Ultrasound and ozonation were studied both singularly and in combination to recover microalgal bio-compounds and phosphorous in the work by Gonzalez-Balderas et al 2020, highlighting protein and lipid release in the US process, while ozone stimulated carbohydrate and phosphorous unbinding (Gonzalez-Balderas et al 2020). Similarly to what was obtained in the present study, the combined process achieved high recovery yields, showing a good potential for valuable compound production.…”

Section: Ultrasonic Pre-treatment Effect On Nutrient Ozonationsupporting

confidence: 78%

Combined ultrasound-ozone treatment for reutilization of primary effluent—a preliminary study

Rossi

Mainardis

Aneggi

et al. 2020

Environ Sci Pollut Res

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The present work is a preliminary study on the potential of low-frequency ultrasound irradiation coupled with O 3 process for the disinfection of a primary effluent from a municipal wastewater treatment plant preserving nutrient levels (in particular nitrogen and phosphorous), for its possible reuse in civil, industrial, and agricultural sectors. The treated water could be reused, after appropriate dilution, contributing to the circular economy perspective and reducing the need for both chemical fertilizer addition and freshwater supply. The effect of different specific ultrasonic energies and ozone doses was assessed on a bench-top system, composed of an ultrasonic reactor and a semi-batch ozonation vessel. The results showed that the combined US-O 3 process produces a good removal efficiency regarding soluble Chemical Oxygen Demand, sCOD (ca. 60%), anionic surfactants (ca. 50%), and formaldehyde (ca. 50%), and an optimal abatement for Methylene Blue Active Substances (MBAS, > 90%). The process also reached high disinfection performances, obtaining 4 logs for E. coli and 5 log abatement for Total Coliforms. The high removal efficiency is matched by an outstanding retention of nutrients (total nitrogen and orthophosphate) highlighting a high potential value for agricultural reuse of the treated primary effluent, with possible significant saving of chemical fertilizers. It was concluded that low-frequency ultrasound pretreatment, combined with ozonation, could be a useful process for primary effluent recovery for several purposes. Further studies are expected to be planned and executed to evaluate system scale-up feasibility.

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Section: Ultrasonic Pre-treatment Effect On Nutrient Ozonationsupporting

confidence: 78%

Combined ultrasound-ozone treatment for reutilization of primary effluent—a preliminary study

Rossi

Mainardis

Aneggi

et al. 2020

Environ Sci Pollut Res

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“…Recently, the functional properties of algae have attracted attention with potential applications in biofuels, cosmetics, nutraceuticals, and pharmaceuticals. Ultrasound has been found useful for improving the extraction efficiency of beneficial components including lipid and protein from algae [ 104 , 105 , 106 ]. Ultrasound has been reported for the production of biofuel from Dunaliella salina and Nannochloropsis oculata, two species of microalagae.…”

Section: Ultrasound Technology For Downstream Processingmentioning

confidence: 99%

Exploitation of Ultrasound Technique for Enhancement of Microbial Metabolites Production

et al. 2020

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Microbial metabolites have significant impacts on our lives from providing valuable compounds for nutrition to agriculture and healthcare. Ever-growing demand for these natural compounds has led to the need for smart and efficient production techniques. Ultrasound is a multi-applicable technology widely exploited in a range of industries such as chemical, medical, biotechnological, pharmaceutical, and food processes. Depending on the type of ultrasound employed, it can be used to either monitor or drive fermentation processes. Ultrasonication can improve bioproduct productivity via intensifying the performance of living organisms. Controlled ultrasonication can influence the metabolites’ biosynthesis efficiency and growth rates by improvement of cell permeability as well as mass transfer and nutrient uptake rates through cell membranes. This review contains a summarized description about suitable microbial metabolites and the applications of ultrasound technique for enhancement of the production of these metabolites as well as the associated downstream processing.

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Algae as a Feedstock for Bioethanol and Biomethane Production

Bhagwat¹,

Amobonye²,

Permaul³

2022

Clean Energy Production Technologies

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Biorefinery process intensification by ultrasound and ozone for phosphorus and biocompounds recovery from microalgae

Cited by 12 publications

References 35 publications

Combined ultrasound-ozone treatment for reutilization of primary effluent—a preliminary study

Combined ultrasound-ozone treatment for reutilization of primary effluent—a preliminary study

Exploitation of Ultrasound Technique for Enhancement of Microbial Metabolites Production

Algae as a Feedstock for Bioethanol and Biomethane Production

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