Microalgae and Wastewater Treatment: Advantages and Disadvantages

Molinuevo-Salces, Beatriz; Riaño, Berta; Hernández, D.; García-González, María Cruz

doi:10.1007/978-981-13-2264-8_20

Cited by 61 publications

(29 citation statements)

References 83 publications

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“…25 In this context, the turbidity of the centrate might have played a role in nutrients removal by affecting the light intensity available to the microalgal community. 26 In the present study, the N-NO 3 − and P-PO 4 3− removal rates observed in the BG-11 control without turbidity were comparable with the removal rates recorded in the D1/10 tests. Moreover, the superior P-PO 4 3− removal rate recorded in the D1/5 tests confirmed that no limitations due to light penetration occurred in none of the centrate dilutions tested.…”

Section: Depletionsupporting

confidence: 85%

Microalgal–bacterial aggregates with flue gas supply as a platform for the treatment of anaerobic digestion centrate

Vital‐Jácome

Díaz‐Zamorano

Cuautle-Marín

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Centrate treatment using microalgal-bacterial processes might be limited by the hydraulic retention time (HRT) required to achieve satisfactory chemical oxygen demand (COD) and nutrients removal. Moreover, the poor settling of microalgal biomass still limits the technical and economic performance of microalgal-bacterial processes. In this work, the performance of microalgal-bacterial aggregates (MABAs) supplied with flue gas was investigated as an effective strategy to improve the treatment of centrate from anaerobic digestion of winery wastewater. RESULTS: MABAs supplied with flue gas achieved maximum soluble COD, N-NO 3− , P-PO 4 3− and N-NH 4 + removal efficiencies of 95%, 94%, 100%, and 100%, respectively, in five-fold centrate dilution within 7 days of operation. Centrate turbidity or its components did not hinder the performance of the MABAs under the conditions tested and no aggregates were formed in controls without MABAs inoculation. The mean diameter of the MABAs after centrate treatment was the same or even larger than that of the aggregates of the inoculum. Scanning electron microscopy analyses showed that the liquid medium composition influenced the structure and the type of microalgae cells established in the MABAs. CONCLUSION: MABAs-based centrate treatment supported by flue gas is a promising technology for improving COD and nutrients removal from centrate as well as further biomass harvesting.

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Section: Depletionsupporting

confidence: 85%

Microalgal–bacterial aggregates with flue gas supply as a platform for the treatment of anaerobic digestion centrate

Vital‐Jácome

Díaz‐Zamorano

Cuautle-Marín

et al. 2019

J of Chemical Tech & Biotech

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“…and Nitzschia sp. help to treat slaughterhouse wastewater (Salces et al, 2019). Microalgae produce high biomass and have high oil content so, for this, it is used as biofuel production, etc.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Approaches Towards Aquaculture: Microalgal Circular Economy Perspectives

Mishra¹,

Tiwari²,

Mahmoud

2021

Preprint

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Microalgae have higher nutritional value as they are abundant in protein, carbohydrates, lipids, and vitamins. Hence, they play several important roles in aquaculture and are known as a major source of the food chain for aquaculture organisms. Furthermore, they are also used indirectly or directly by humans as food supplements and medicines to improve health by strengthening the immune system. Microalgae are used as biocontrol agents because they have biocidal properties, produce biomolecules (beta carotene, PUFA, and astaxanthin), wastewater, are a renewable resource of biofuel, and are used in wastewater treatment. Due to the overexploitation of wild fish and pollution, aquaculture faces serious issues. Eco- friendly methods are required to overcome this problem, so, microalgae are in practicing, that control the water pollution. Fishmeal is a rich source of protein in aquaculture but it is decreasing over time and has become cost-effective, so, to solve the problem, microalgae are used to replace the fishmeal which (microalgae as aquafeed) is cheap and not required large area to grow. Microalgae are seemed to be very useful in the growth enhancement of aquatic organisms.

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“…Microalgae can deploy within the whole water profile and hence can improve the treatment by their high suspended algal cells concentrations (Forni et al ., 2001; Chawla et al ., 2020). They also show high nutrient uptake capabilities as they use inorganic nitrogen and phosphorus for their growth (Abdel‐Raouf et al ., 2012; Beuckels et al ., 2015; Li et al ., 2019; Molinuevo‐Salces et al ., 2019). Algal biomass also has the potential for bioremediation of the toxic effects of heavy metal ions from industrial wastewaters (Zeraatkar et al ., 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Beside the recognized performance capabilities, the harvested algal biomass offers a lot of useful byproducts applications ‏such as: fuels (like gasoline, diesel and fuel), plastics and foams (like surfboards), industrial chemicals, food for humans and animals, fertilizers, health supplements (like omega‐3 fatty acids), cosmetics and pharmaceuticals (Molinuevo‐Salces et al ., 2019). Microalgae also have over than 50% higher oil yields than terrestrial crops used for biofuel production (Udom et al ., 2013).…”

Section: Introductionmentioning

confidence: 99%

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Application of algae to free surface wetlands for effluent reuse

Yehia

El-Saadi

Galal

2020

Water & Environment J

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The main goal of this study is to assess the role of Algae in the treatment of wastewater and its capability to improve the performance of the free surface wetland as a green solution. It offers a non‐conventional water resource that participate in solving the water scarcity issue in Egypt. This study was carried out in Lake Manzala Water Research Station which is located at the tail end of Bahr El Baqar Drain in Northern Delta in ‏Egypt. A pilot scale wetland consisting of four parallel basins under natural climatic conditions were used for the experiment. The first cell was cultivated with Reeds (traditional plant used in wetlands), while the algae were cultivated in the three other basins. Three different microalgae and algae species (Chlorella, Spirulina and Azolla) were experimented and compared to assess for the finest removal efficiency for different contaminants as BOD, COD, TN, TP, TC, FC and heavy metals. A tailor‐made module was developed with Excel Visual Basic Application programming language to compare the efficiencies of the different treatment systems. Results showed that BOD and COD best removal results were reached by Chlorella with 88% and 84% removal efficiencies respectively. Results also showed that Azolla is the most efficient treatment media for drainage water containing high concentrations of TN while Spirulina was found to be the most efficient in extracting the heavy metals such as Aluminum (Al), Iron (Fe) and Manganese (Mn).

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Microalgae and Wastewater Treatment: Advantages and Disadvantages

Cited by 61 publications

References 83 publications

Microalgal–bacterial aggregates with flue gas supply as a platform for the treatment of anaerobic digestion centrate

Microalgal–bacterial aggregates with flue gas supply as a platform for the treatment of anaerobic digestion centrate

Sustainable Approaches Towards Aquaculture: Microalgal Circular Economy Perspectives

Application of algae to free surface wetlands for effluent reuse

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