Technologies for harvesting the microalgae for industrial applications: Current trends and perspectives

Li, Yong; Hao, Nahui; Hou, Yuyong; Wang, Qing; Liu, Qingling; Yan, Shihai; Chen, Fangjian; Zhao, Lei

doi:10.1016/j.biortech.2023.129631

Cited by 14 publications

(8 citation statements)

References 125 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, toxicity of microplastics to microalgae should not be ignored when this technique is used to remove microplastics from wastewater. (3) Environmental risk of residual algal cells in the treatment system: Until now, the frequently-used methods for microalgae harvest are sedimentation, flotation, centrifugation, and filtration, whose recovery efficiencies are 10–90, 50–90, >90, and 70%–90%, respectively ( Liu et al, 2023 ). Some algal cells would remain in the treatment system, which may pose a potential risk to environment because they could cause a negative impact on the diversity of aquatic ecosystems ( Padervand et al, 2020 ).…”

Section: Feasibility Challenges and Future Perspectivesmentioning

confidence: 99%

“…Until now, the frequently-used methods for microalgae harvest are sedimentation, flotation, centrifugation, and filtration, whose recovery efficiencies are 10-90, 50-90, >90, and 70%-90%, respectively (Liu et al, 2023). Some algal cells would remain in the treatment system, which may pose a potential risk to environment because they could cause a negative impact on the diversity of aquatic ecosystems (Padervand et al, 2020).…”

Section: Challenges Of the Microalgae-based Bioremediation Techniquementioning

confidence: 99%

See 1 more Smart Citation

Feasibility, challenges, and future prospects of microalgae-based bioremediation technique for removing microplastics from wastewater

Gao,

Ning,

Deng

2023

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

Section: Feasibility Challenges and Future Perspectivesmentioning

confidence: 99%

Section: Challenges Of the Microalgae-based Bioremediation Techniquementioning

confidence: 99%

Feasibility, challenges, and future prospects of microalgae-based bioremediation technique for removing microplastics from wastewater

Gao,

Ning,

Deng

2023

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

“…In addition, Gao et al [23] were able to increase biomass productivity when reducing the HRT from 6 to 2 d (SRT= 21 d). To achieve this decoupling, the microalgae biomass needs to be separated from the wastewater stream, which is not a simple process and requires the use of harvesting systems that are generally energetically and economically demanding [24,25]. A harvesting-step is also necessary to concentrate the microalgae biomass with the aim of obtaining added-value by-products, such as biogas from its anaerobic digestion [26], biocrude with high content of alkenes and alkanes [27], biodiesel [28], lipids [29], fatty acids methyl esters [30], nutraceutical applications as linoleic and linolenic acids [31], eicosapentaenoic acid (EPA) and docosahexanoic acid (DHA) [32] or pigments in a biorefinery approach [33].…”

Section: Introductionmentioning

confidence: 99%

“…Low magnetic capacity lifetime. Emerging technology (low TRL) [25,38,39]. Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted:…”

mentioning

confidence: 99%

Ultrafiltration Harvesting of Microalgae Culture Cultivated in a WRRF: Long-Term Performance and Techno-Economic and Carbon Footprint Assessment

Mora-Sánchez,

González-Camejo,

Noriega-Hevia

et al. 2023

Preprint

View full text Add to dashboard Cite

A cross-flow ultrafiltration harvesting system of a pre-concentrated microalgae culture was tested in an innovative anaerobic-based WRRF. The microalgae culture was cultivated in a membrane photobioreactor fed with the effluent from an anaerobic membrane bioreactor treating sewage. These harvested microalgae biomass was then anaerobically co-digested with primary and secondary sludge from the water line. Depending on the needs of this anaerobic co-digestion, the filtration harvesting process was evaluated intermittently over a period of 212 days for different operating conditions, mainly the total amount of microalgae biomass harvested and the desired final total solids concentration (up to 15.9 g·L1 with an average of 9.7 g·L1). Concentration ratios of 15-27 were obtained with average transmembrane fluxes ranged from 5 to 28 L·m2·h1. Regarding membrane cleaning, both backflushing and chemical cleaning resulted in transmembrane flux recoveries that were, on average, 21% higher than those achieved with backflushing alone. The carbon footprint assessment shows promising results as the GHG emissions associated with the cross-flow ultrafiltration harvesting process could be less than the emissions savings associated with the energy recovered from the biogas production from the anaerobic valorisation of the harvested microalgae.

show abstract

“…Filtration is the separation of solid and liquid via a membrane with pores that allow microalgae medium to pass through while retaining cells [5]. Membrane fouling is the biggest issue with using this technology, and it usually requires various improvement strategies to increase its efficiency [6].…”

Section: Introductionmentioning

confidence: 99%

Application of Extracellular Polymeric Substances during Cultivation of Microalgae Biomass

Rusanowska,

Zieliński,

Dudek

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

Extracellular polymeric substances (EPS) produced by microorganisms contain polymers that are used for the bioflocculation of microalgae; however, these polymers are also organic compounds that might be used as carbon sources. The study analyzed two strategies for the introduction of EPS for Tetraselmis subcordiformis, Chlorella sp., and Arthrospira platensis biomass harvesting. In the first variant, EPS in the dose of 100 mg TOC/g were added to the photobioreactor every other day from the beginning of the cultivation, while in the second variant, EPS in the two doses of 100 mg TOC/g and 300 mg TOC/g were only added at the end of cultivation. In the first variant, the results proved that microalgae/cyanobacteria can use the EPS as external carbon sources. The cultures were characterized by a faster increase in biomass concentration, which contained less chlorophyll. However, the EPS content did not change. In the second variant, the addition of EPS did not affect the EPS content and the sedimentation of the Chlorella sp. biomass. The biomass of T. subcordiformis was characterized by a much better sedimentation coefficient. The greatest differences were observed in the A. platensis culture: the biomass concentration increased from 1.2 ± 0.2 g/L to 1.9 ± 0.2 g/L, EPS content increased by 16%, and sedimentation efficiency increased to 72%.

show abstract

Technologies for harvesting the microalgae for industrial applications: Current trends and perspectives

Cited by 14 publications

References 125 publications

Feasibility, challenges, and future prospects of microalgae-based bioremediation technique for removing microplastics from wastewater

Feasibility, challenges, and future prospects of microalgae-based bioremediation technique for removing microplastics from wastewater

Ultrafiltration Harvesting of Microalgae Culture Cultivated in a WRRF: Long-Term Performance and Techno-Economic and Carbon Footprint Assessment

Application of Extracellular Polymeric Substances during Cultivation of Microalgae Biomass

Contact Info

Product

Resources

About