Microalgae systems - environmental agents for wastewater treatment and further potential biomass valorisation

Amaro, Helena M.; Salgado, Eva M.; Nunes, Olga C.; Pires, José C.M.; Esteves, Ana F.

doi:10.1016/j.jenvman.2023.117678

Cited by 83 publications

(16 citation statements)

References 105 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a study conducted in photobioreactors, Chlorella sorokiniana performed a E. coli removal rate of 99.8% in anaerobically treated black water in photobioreactors [53]. Overall, as reported in a recent review, the E. coli removal rate is on average higher than 98% [54].…”

Section: Discussionmentioning

confidence: 84%

Comparative Phycoremediation Performance of Three Microalgae Species in Two Different Magnitude of Pollutants in Wastewater from Farmhouse

et al. 2023

View full text Add to dashboard Cite

The cultivation of microalgae using urban wastewater as a nutrient substrate represents a promising bio-refinery concept that can serve multiple purposes; indeed, it allows for the generation of biomass, which can be used for various applications while meanwhile removing nutrients from wastewater. In this study, the potential of urban wastewater collected at two different time periods in a farmhouse as a nutrient substrate for microalgal growth was assessed. Wastewater samples were treated on a laboratory scale, inoculating reactors with two common species, Chlorella vulgaris (CV) and Scenedesmus quadricauda (SQ), and with an autochthonous strain of Klebsormidium sp. K39 (Kleb), directly isolated from effluents of the same system. The main aim of the study was to compare the microalgae’s performances in terms of wastewater re-mediation and biomass productivity. In the first case study, which involved an effluent with a lower pollutant level, microalgal cultivation showed removal efficiencies in the range of 57–63% for total nitrogen, 65–92% for total phosphorous, 94–95% for COD, and 100% for E. coli. In the second case study, involving an effluent with a higher pollutant level, the remediation performances of the three microalgae strains ranged from 93 to 96% for total nitrogen, from 62 to 74% for total phosphorous, from 96 to 97% for COD, and 100% for E. coli. At the end of the experimental trials, treated waters showed values of pollutants suitable for irrigation use, in accordance with environmental and national legislation, which established specific thresholds for irrigation purposes.

show abstract

Section: Discussionmentioning

confidence: 84%

Comparative Phycoremediation Performance of Three Microalgae Species in Two Different Magnitude of Pollutants in Wastewater from Farmhouse

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Algae are well-known as autotrophs (organisms that utilize the energy from photosynthesis to grow), play a significant role in wastewater treatment (Amaro et al, 2023). Algae's chemical treatment capabilities through photosynthesis, can fix carbon dioxide and efficiently remove excess nutrients at a low cost.…”

Section: Bioremediation Integration With Biodiesel Productionmentioning

confidence: 99%

“…Bioremediation is a subfield of biotechnology that uses live organisms like bacteria and microorganisms to remove contaminants, pollutants, and toxins from soil, water, and other environments (Brown, 2022). Algae are well‐known as autotrophs (organisms that utilize the energy from photosynthesis to grow), play a significant role in wastewater treatment (Amaro et al, 2023). Algae's chemical treatment capabilities through photosynthesis, can fix carbon dioxide and efficiently remove excess nutrients at a low cost.…”

Section: Applicationsmentioning

confidence: 99%

New insights into Chlorella vulgaris applications

Al‐Hammadi,

Güngörmüşler

2024

Biotech & Bioengineering

View full text Add to dashboard Cite

Environmental pollution is a big challenge that has been faced by humans in contemporary life. In this context, fossil fuel, cement production, and plastic waste pose a direct threat to the environment and biodiversity. One of the prominent solutions is the use of renewable sources, and different organisms to valorize wastes into green energy and bioplastics such as polylactic acid. Chlorella vulgaris, a microalgae, is a promising candidate to resolve these issues due to its ease of cultivation, fast growth, carbon dioxide uptake, and oxygen production during its growth on wastewater along with biofuels, and other productions. Thus, in this article, we focused on the potential of Chlorella vulgaris to be used in wastewater treatment, biohydrogen, biocement, biopolymer, food additives, and preservation, biodiesel which is seen to be the most promising for industrial scale, and related biorefineries with the most recent applications with a brief review of Chlorella and polylactic acid market size to realize the technical/nontechnical reasons behind the cost and obstacles that hinder the industrial production for the mentioned applications. We believe that our findings are important for those who are interested in scientific/financial research about microalgae.

show abstract

“…Cyanobacteria also possess a series of favorable characteristics that have led them to be widely used in various biotechnological applications, as highlighted in the review [153]. For instance, microalgae are used in wastewater treatment, as sustainable sources to produce high-value compounds, fertilizers, hydrogen, biofuel, or livestock feed, as well as a way of carbon sequestration to avoid CO 2 increase and global warming [154]. Microalgae possess a carbon fixation capacity that is 10-50 times higher than that of terrestrial plants [155].…”

Section: Biotechnological Potentialmentioning

confidence: 99%

Microalgal and Nitrogen-Fixing Bacterial Consortia: From Interaction to Biotechnological Potential

Llamas,

Leon-Miranda,

Tejada-Jimenez

2023

Plants

View full text Add to dashboard Cite

Microalgae are used in various biotechnological processes, such as biofuel production due to their high biomass yields, agriculture as biofertilizers, production of high-value-added products, decontamination of wastewater, or as biological models for carbon sequestration. The number of these biotechnological applications is increasing, and as such, any advances that contribute to reducing costs and increasing economic profitability can have a significant impact. Nitrogen fixing organisms, often called diazotroph, also have great biotechnological potential, mainly in agriculture as an alternative to chemical fertilizers. Microbial consortia typically perform more complex tasks than monocultures and can execute functions that are challenging or even impossible for individual strains or species. Interestingly, microalgae and diazotrophic organisms are capable to embrace different types of symbiotic associations. Certain corals and lichens exhibit this symbiotic relationship in nature, which enhances their fitness. However, this relationship can also be artificially created in laboratory conditions with the objective of enhancing some of the biotechnological processes that each organism carries out independently. As a result, the utilization of microalgae and diazotrophic organisms in consortia is garnering significant interest as a potential alternative for reducing production costs and increasing yields of microalgae biomass, as well as for producing derived products and serving biotechnological purposes. This review makes an effort to examine the associations of microalgae and diazotrophic organisms, with the aim of highlighting the potential of these associations in improving various biotechnological processes.

show abstract

Microalgae systems - environmental agents for wastewater treatment and further potential biomass valorisation

Cited by 83 publications

References 105 publications

Comparative Phycoremediation Performance of Three Microalgae Species in Two Different Magnitude of Pollutants in Wastewater from Farmhouse

Comparative Phycoremediation Performance of Three Microalgae Species in Two Different Magnitude of Pollutants in Wastewater from Farmhouse

New insights into Chlorella vulgaris applications

Microalgal and Nitrogen-Fixing Bacterial Consortia: From Interaction to Biotechnological Potential

Contact Info

Product

Resources

About