Complete N and P removal from hydroponic greenhouse wastewater by Tetradesmus obliquus: A strategy for algal bioremediation and cultivation in Nordic countries

Salazar, João; Santana‐Sánchez, Anita; Näkkilä, Juha; Şirin, Sema; Allahverdiyeva, Yagut

doi:10.1016/j.algal.2023.102988

Cited by 13 publications

(5 citation statements)

References 40 publications

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“…Agricultural wastewater from a commercial hydroponic greenhouse is one of the leading significant causes of environmental pollution due to the availability of unused nutrients, dissolved salts, and organic matter. Salazar et al [ 220 ] estimated the bioremediation potential of microalgae Tetradesmus obliquus sp. NIVA-CHL107 on hydroponic wastewater, notably, the 100% removal efficiency of N and P was recorded.…”

Section: Performance Of Microalgae In Hydroponic Systemsmentioning

confidence: 99%

Hydroponics with Microalgae and Cyanobacteria: Emerging Trends and Opportunities in Modern Agriculture

Renganathan,

Puente,

Sukhanova

et al. 2024

BioTech

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The global population is expected to reach 9.5 billion, which means that crop productivity needs to double to meet the growing population’s food demand. Soil degradation and environmental factors, such as climate events, significantly threaten crop production and global food security. Furthermore, rapid urbanization has led to 55% of the world’s population migrating to cities, and this proportion is expected to increase to 75% by 2050, which presents significant challenges in producing staple foods through conventional hinterland farming. Numerous studies have proposed various sustainable farming techniques to combat the shortage of farmable land and increase food security in urban areas. Soilless farming techniques such as hydroponics have gained worldwide popularity due to their resource efficiency and production of superior-quality fresh products. However, using chemical nutrients in a conventional hydroponic system can have significant environmental impacts, including eutrophication and resource depletion. Incorporating microalgae into hydroponic systems as biostimulants offers a sustainable and ecofriendly approach toward circular bioeconomy strategies. The present review summarizes the plant growth-promoting activity of microalgae as biostimulants and their mechanisms of action. We discuss their effects on plant growth parameters under different applications, emphasizing the significance of integrating microalgae into a closed-loop circular economy model to sustainably meet global food demands.

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Section: Performance Of Microalgae In Hydroponic Systemsmentioning

confidence: 99%

Hydroponics with Microalgae and Cyanobacteria: Emerging Trends and Opportunities in Modern Agriculture

Renganathan,

Puente,

Sukhanova

et al. 2024

BioTech

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“…47,48 Among these sources, NH 4 + is the most preferred due to its reduced form of nitrogen, which requires less energetic cost during bioassimilation. 47 Generally, in water NH 3 and NH 4 + constitute a buffer system as mentioned in the following equation (eqn (11)).…”

Section: Variation In Physicochemical Properties Of He and Nutrient U...mentioning

confidence: 99%

“…Some of the recently tested technologies for HE treatment include ultraviolet treatment, 7 microfiltration, 8 chemical precipitation, 3 ultrafiltration coupled with reverse osmosis, 8 sand filtration 3 constructed wetlands, 9 and nitrification–denitrification. 10 Further, a recent study by Salazar et al 11 highlighted the possible use of microalgae for the treatment of HE.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic bioconversion of hydroponic effluent into biochemical-rich biomass for microalgal biorefineries

Tiwari,

Prajapati

2023

Environ. Sci.: Water Res. Technol.

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“…It was found to be capable of achieving removal efficiencies from cucumber hydroponic drainage close to 35% for nitrates and 98% for phosphates (where this efficiency was maximized at higher pH) while growing in PBR conditions [28]. These removal efficiencies could be increased up to 100% of N and P using a pilot-scale indoor photobioreactor equipped with LEDs [29].…”

Section: Introductionmentioning

confidence: 99%

“…Among these investigations, the study of new species and the optimization of culture protocols that achieve maximum nutrient absorption and higher quality biomass production is crucial. On the same basis, it is necessary to develop strategies for the recovery of produced biomass, as well as its industrial and/or commercial applications [29].…”

Section: Introductionmentioning

confidence: 99%

Revolutionizing Agriculture: Leveraging Hydroponic Greenhouse Wastewater for Sustainable Microalgae-Based Biostimulant Production

Álvarez-Gil,

Blanco-Vieites,

Suárez-Montes

et al. 2023

Sustainability

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The current intensification in agricultural pressure has resulted in the addition of excessive amounts of nutrients. While hydroponic systems have become an agricultural tool to reduce this nutrient addition, the produced nutrient-rich drainage solution, which has a negative effect in water bodies, is still a barrier that needs to be overcome. A promising alternative for nutrient recovery is the cultivation of microalgae, which require a significant quantity of nutrients for their growth. Furthermore, their biostimulant properties enhance the circularity and sustainability approach. This study evaluates microalgae growth with a hydroponic drainage solution and the use of the resulting biomass as a source for biostimulant. Three microalgae strains were tested (Desmodesmus sp., Chlorella vulgaris, and Scenedesmus obliquus) and grown at laboratory scale (0.5 and 2 L) with drainage wastewater taken from hydroponic tomato crops. Measures of OD750 and OD680 revealed Desmodesmus sp. as the strain with the best performance, achieving 1.4 and 1.8, respectively, in the 0.5 L assay and 1.08 and 1.3 in the 2 L assay. These results were confirmed in another assay that compared Desmodesmus sp. growth in drainage wastewater and in control media. Then, Desmodesmus sp. was tested at industrial scale. Results show the columnar PBR reached 1.8 g·L−1 compared to 1.1 g·L−1 achieved with raceways. Finally, the resulting biomass was tested in a biocatalysis process for biostimulant production, suggesting an innovative system to use microalgae biomass cultured in wastewater as a valuable product such as biostimulant.

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Complete N and P removal from hydroponic greenhouse wastewater by Tetradesmus obliquus: A strategy for algal bioremediation and cultivation in Nordic countries

Cited by 13 publications

References 40 publications

Hydroponics with Microalgae and Cyanobacteria: Emerging Trends and Opportunities in Modern Agriculture

Hydroponics with Microalgae and Cyanobacteria: Emerging Trends and Opportunities in Modern Agriculture

Photosynthetic bioconversion of hydroponic effluent into biochemical-rich biomass for microalgal biorefineries

Revolutionizing Agriculture: Leveraging Hydroponic Greenhouse Wastewater for Sustainable Microalgae-Based Biostimulant Production

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