The Cultivation of Lipid-Rich Microalgae Biomass as Anaerobic Digestate Valorization Technology—A Pilot-Scale Study

Dębowski, Marcin; Zieliński, Marcin; Kisielewska, Marta; Kazimierowicz, Joanna; Dudek, Magda; Świca, Izabela; Rudnicka, Aleksandra

doi:10.3390/pr8050517

Cited by 31 publications

(14 citation statements)

References 39 publications

(41 reference statements)

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“…The use of these kind of culture media, wastewater in particular, has been successfully applied to meet a circular economy and reduce cost of microalgae cultivation [92]. The use of digestate from anaerobic digestion process [47,93], brewery wastewater [94], agroindustrial wastewater [95], etc., are examples of sources of culture media alternatives for microalgae production under circular economy schemes.…”

Section: Cultivation (Photobioreactors and Growth Conditions)mentioning

confidence: 99%

Microalgae Biomass as a New Potential Source of Sustainable Green Lubricants

et al. 2022

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Lubricants are materials able to reduce friction and/or wear of any type of moving surfaces facilitating smooth operations, maintaining reliable machine functions, and reducing risks of failures while contributing to energy savings. At present, most worldwide used lubricants are derived from crude oil. However, production, usage and disposal of these lubricants have significant impact on environment and health. Hence, there is a growing pressure to reduce demand of this sort of lubricants, which has fostered development and use of green lubricants, as vegetable oil-based lubricants (biolubricants). Despite the ecological benefits of producing/using biolubricants, availability of the required raw materials and agricultural land to create a reliable chain supply is still far from being established. Recently, biomass from some microalgae species has attracted attention due to their capacity to produce high-value lipids/oils for potential lubricants production. Thus, this multidisciplinary work reviews the main chemical-physical characteristics of lubricants and the main attempts and progress on microalgae biomass production for developing oils with pertinent lubricating properties. In addition, potential microalgae strains and chemical modifications to their oils to produce lubricants for different industrial applications are identified. Finally, a guide for microalgae oil selection based on its chemical composition for specific lubricant applications is provided.

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Section: Cultivation (Photobioreactors and Growth Conditions)mentioning

confidence: 99%

Microalgae Biomass as a New Potential Source of Sustainable Green Lubricants

et al. 2022

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“…Chlorella vulgaris UTEX 2714 and Arthrospira platensis UTEX LB2720 originated from UTEX Culture Collection of Algae (University of Texas, Austin, USA). The biomass of microalgae was initially adapted for a period of 100 days to the liquid anaerobic digestate medium obtained from agricultural biogas plant in the hybrid photobioreactors with an active volume of 2.0 m 3 [30,31].…”

Section: Microalgae Inoculum Cultivation and Experimental Organizationmentioning

confidence: 99%

Effects of Liquid Digestate Treatment on Sustainable Microalgae Biomass Production

et al. 2021

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The aim of the study was to investigate the potential of microalgal cultivation on anaerobic liquid digestate as a growth medium. The two methods of liquid digestate treatment including centrifugation and distillation and the two algal strains (Chlorella vulgaris and Arthrospira platensis) were compared. Additionally, the volume of the liquid digestate used to prepare the culture medium constituted from 10 to 50% of the medium volume. The study demonstrated that the highest C. vulgaris and A. platensis biomass productions of 2490 mg TS/L and 2990 mg/L, respectively, were obtained by adding 50% of distilled digestate to a growth medium. Regarding centrifuged liquid digestate, only 10% dilution was required to obtain the maximum final biomass concentration. A. platensis removed 81.1% and 66.4% of the total nitrogen from medium prepared on distilled and centrifuged digestate, respectively, while C. vulgaris ensured 64.1% and 47.1% of removal, respectively. The phosphorus removal from both culture media was higher than 94.2% with A. platensis, while it was 70.4% from distilled and 87.4% from centrifuged media with C. vulgaris. The study confirmed a great potential of microalgal biomass production on anaerobic liquid digestate with a high treatment efficiency of digestate.

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“…Efforts are still being made to improve the technological efficiency of anaerobic processes. Reactors with an innovative design have been used [ 16 , 17 ], physical factors have been implemented [ 18 , 19 ], and the pre-preparation of biodegradable pollutants [ 20 ] or the integration of anaerobic wastewater treatment with microalgae technologies has been increasingly introduced [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Anaerobic Reactor Filling for Phosphorus Removal by Metal Dissolution Method

2022

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A commonly indicated drawback of anaerobic wastewater treatment is the low effectiveness of phosphorus removal. One possibility to eliminate this disadvantage is the implementation of active fillings that contain admixtures of metals, minerals, or other elements contributing to wastewater treatment intensification. The aim of the research was to present an active filling produced via microcellular extrusion technology, and to determine its properties and performance in anaerobic wastewater treatment. The influence of copper and iron admixtures on the properties of the obtained porous extrudate in terms of its functional properties was also examined. The Barus effect increased with the highest content of the blowing agent in the material from 110 ± 12 to 134 ± 14. The addition of metal powders caused an increase in the extrudate density. The modification of PVC resulted in the highest porosity, amounting to 47.0% ± 3.2%, and caused the tensile strength to decrease by about 50%. The determined values ranged from 211.8 ± 18.3 MPa to 97.1 ± 10.0 MPa. The use of the filling in anaerobic rectors promoted COD removal, intensified biogas production, and eliminated phosphorus with an efficiency of 64.4% to 90.7%, depending on the type of wastewater and applied technological parameters.

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The Cultivation of Lipid-Rich Microalgae Biomass as Anaerobic Digestate Valorization Technology—A Pilot-Scale Study

Cited by 31 publications

References 39 publications

Microalgae Biomass as a New Potential Source of Sustainable Green Lubricants

Microalgae Biomass as a New Potential Source of Sustainable Green Lubricants

Effects of Liquid Digestate Treatment on Sustainable Microalgae Biomass Production

Anaerobic Reactor Filling for Phosphorus Removal by Metal Dissolution Method

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