Assessment upon heterotrophic microalgae screened from wastewater microbiota for concurrent pollutants removal and biofuel production

Shen, Liang; Ndayambaje, Jean Damascène; Murwanashyaka, Theophile; Cui, Wenqian; Manirafasha, Emmanuel; Chen, Cuixue; Wang, Yuanpeng; Lu, Yinghua

doi:10.1016/j.biortech.2017.07.177

Cited by 41 publications

(12 citation statements)

References 33 publications

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“…Numerous studies have revealed the potential for oleaginous microalgal cultivation in wastewater for producing biodiesel, where microalgae have exhibited significant efficiency in removing the contaminants from wastewater (Ahmed et al, 2021b) and the capacity to collect lipid in the cell body. Microalgae can be cultivated in both municipal wastewater and industrial effluents (Ahmed et al, 2021), for example, from rubber and palm oil mills and the textile industry, and in starch wastewater and wastewater containing heavy metals (Mohd Udaiyappan et al, 2017;Shen et al, 2017;Srinuanpan et al, 2020). For instance, Choleralla sp.…”

Section: Cultivation Of Microalgae For Wastewater Treatment and Simultaneous Lipid Extractionmentioning

confidence: 99%

“…Similarly, another study that used Botryococcus sp. to treat domestic effluent found that the microalgae were able to remove 64.5, 89.8, and 67.9% of total nitrogen, total phosphorous, and total organic carbon, respectively, and was also able to accumulate up to 61.7% w/w dry cell lipid (Shen et al, 2017).…”

Section: Cultivation Of Microalgae For Wastewater Treatment and Simultaneous Lipid Extractionmentioning

confidence: 99%

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Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

et al. 2021

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Third-generation biofuel produced from microalgae is a viable solution to global energy insecurity and climate change. Despite an annual current global algal biomass production of 38 million litres, commercialization confronts significant economic challenges. However, cost minimization strategies, particularly for microalgae cultivation, have largely been excluded from recent studies. Therefore, this review provides essential insights into the technologies and economics of cost minimization strategies for large-scale applications. Cultivation of microalgae through aquafarming, in wastewater, or for biogas upgrading, and co-production of value-added products (VAPs) such as photo-bioreactors, protein, astaxanthin, and exopolysaccharides can drastically reduce biodiesel production costs. For instance, the co-production of photo-bioreactors and astaxanthin can reduce the cost of biodiesel production from $3.90 to $0.54 per litre. Though many technical challenges need to be addressed, the economic analysis reveals that incorporating such cost-effective strategies can make the biorefinery concept feasible and profitable. The cost of producing microalgal biodiesel can be lowered to $0.73kg−1 dry weight when cultivated in wastewater or $0.54L−1 when co-produced with VAPs. Most importantly, access to co-product markets with higher VAPs needs to be encouraged as the global market for microalgae-based VAPs is estimated to rise to $53.43 billion in 2026. Therefore, policies that incentivize research and development, as well as the production and consumption of microalgae-based biodiesel, are important to reduce the large gap in production cost that persists between biodiesel and petroleum diesel.

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Section: Cultivation Of Microalgae For Wastewater Treatment and Simultaneous Lipid Extractionmentioning

confidence: 99%

Section: Cultivation Of Microalgae For Wastewater Treatment and Simultaneous Lipid Extractionmentioning

confidence: 99%

Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

et al. 2021

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“…The genus is comprised of approximately 70 colonial, green microalgae species; Scenedesmus cells are 5-8 µm wide, twice as long, and form 2 to 16 cell-colonies with poles of terminal cells equipped with a single spine [80]. Beside culture-collection strains, locally isolated strains and mixed cultures can be successfully implemented in wastewater treatment [81][82][83].…”

Section: Microalgae Strains Used For Wastewater Reclamationmentioning

confidence: 99%

“…Shen and coworkers [83] studied 20 microalgal strains isolated from a municipal wastewater treatment plant for their ability to treat wastewater and accumulate lipids in their biomass. One strain of Botryococcus sp.…”

Section: Enhanced Lipid Production During Wastewater Treatmentmentioning

confidence: 99%

Algal Biomass from Wastewater and Flue Gases as a Source of Bioenergy

et al. 2018

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Algae are without doubt the most productive photosynthetic organisms on Earth; they are highly efficient in converting CO 2 and nutrients into biomass. These abilities can be exploited by culturing microalgae from wastewater and flue gases for effective wastewater reclamation. Algae are known to remove nitrogen and phosphorus as well as several organic contaminants including pharmaceuticals from wastewater. Biomass production can even be enhanced by the addition of CO 2 originating from flue gases. The algal biomass can then be used as a raw material to produce bioenergy; depending on its composition, various types of biofuels such as biodiesel, biogas, bioethanol, biobutanol or biohydrogen can be obtained. However, algal biomass generated in wastewater and flue gases also contains contaminants which, if not degraded, will end up in the ashes. In this review, the current knowledge on algal biomass production in wastewater and flue gases is summarized; special focus is given to the algal capacity to remove contaminants from wastewater and flue gases, and the consequences when converting this biomass into different types of biofuels.

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“…and imported Chlorella sp. did not have lag phases (Figure 1) suggesting their good adaptability to new environmental conditions (Shen et al 2017). Quick adaptability is a desired biological trait and one of the main selection criteria in the production of algal biomass for biofuels since it determines the potential applicability of culturing that microalgal species in cheap but extreme environments such as wastewater (Shen et al 2017).…”

Section: Discussionmentioning

confidence: 96%

Isolation and screening of microalgal species, native to Zimbabwe, with potential use in biodiesel production

et al. 2021

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Microalgae are increasingly being preferred as sustainable biomass feedstock for biofuels production due to their high growth rate and lipid yield. However, optimal production requires the use of economical native microalgal species which are well adapted to local climatic and ecological conditions. Therefore, this study's main objective was to isolate and select local microalgal species for prospective biofuels production. Serial dilution and streak plate techniques were used to isolate four species: Chlorella, Scenedesmus, Oscillatoria and Microcystis from Manyame River, Zimbabwe. The isolates were evaluated for their biomass and lipid productivity under artificial lighting (8:16 h light/dark cycle) and a temperature of 25 ± 3°C. Lipid quantification was done gravimetrically, using hexane as an extraction solvent. Each isolate's performance was compared against that of an imported Chlorella vulgaris strain. Amongst the isolates, Chlorella sp. exhibited a highly competitive growth rate of 0.26 d −1 and lipid yield of 37.16% dry cell weight. In comparison, the imported C. vulgaris had a growth rate of 0.226 d −1 and lipid yield of 35.74% dry cell weight. Although findings suggest that the native Chlorella sp. is the ideal candidate, growth enhancement and genetic engineering techniques may be used to further improve its biomass and lipid yield.

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Assessment upon heterotrophic microalgae screened from wastewater microbiota for concurrent pollutants removal and biofuel production

Cited by 41 publications

References 33 publications

Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

Strategies to Produce Cost-Effective Third-Generation Biofuel From Microalgae

Algal Biomass from Wastewater and Flue Gases as a Source of Bioenergy

Isolation and screening of microalgal species, native to Zimbabwe, with potential use in biodiesel production

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