Production and use of Scenedesmus acuminatus biomass in synthetic municipal wastewater for integrated biorefineries

Onay, Melih; Aladağ, Erdinç

doi:10.1007/s11356-022-23332-x

Cited by 7 publications

(5 citation statements)

References 48 publications

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“…It should be highlighted that some of the main degradation products of CLQ ( m / z = 320.19, C 18 H 26 ClN 3 ) identified by LC-QTOF-MS with no-CLQ culture as the background control, e.g., m / z = 114.09, C 7 H 16 N, might promote the activity of catalase, , an enzyme that is widely spread in microorganisms and essential for activated sludge-based wastewater treatment, and alleviate the inhibition of hydrogen peroxide on N 2 O reduction during the denitrification process of Thiobacillus denitrificans . Such an inference suggested that the formed CLQ biodegradation products might affect N 2 O production through the aforementioned AOB denitrification pathway.…”

Section: Resultsmentioning

confidence: 99%

Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N₂O Production

Chen,

Li,

Lin

et al. 2024

Environ. Sci. Technol.

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Since the mass production and extensive use of chloroquine (CLQ) would lead to its inevitable discharge, wastewater treatment plants (WWTPs) might play a key role in the management of CLQ. Despite the reported functional versatility of ammonia-oxidizing bacteria (AOB) that mediate the first step for biological nitrogen removal at WWTP (i.e., partial nitrification), their potential capability to degrade CLQ remains to be discovered. Therefore, with the enriched partial nitrification sludge, a series of dedicated batch tests were performed in this study to verify the performance and mechanisms of CLQ biodegradation under the ammonium conditions of mainstream wastewater. The results showed that AOB could degrade CLQ in the presence of ammonium oxidation activity, but the capability was limited by the amount of partial nitrification sludge (∼1.1 mg/L at a mixed liquor volatile suspended solids concentration of 200 mg/L). CLQ and its biodegradation products were found to have no significant effect on the ammonium oxidation activity of AOB while the latter would promote N 2 O production through the AOB denitrification pathway, especially at relatively low DO levels (≤0.5 mg-O 2 /L). This study provided valuable insights into a more comprehensive assessment of the fate of CLQ in the context of wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N₂O Production

Chen,

Li,

Lin

et al. 2024

Environ. Sci. Technol.

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“…In a study performed by Sharma et al [ 46 ], other consortia of microalgae were cultured in diluted municipal wastewater, and the highest mean chlorophyll concentration (25.2 mg L −1 ) was observed. Scenedesmus acuminatus culture accumulated the highest concentration of chlorophyll a and chlorophyll b (59.9 ± 3.5, 18.4 ± 3.6 mg L −1 , respectively) when cultivated in 50% synthetic municipal wastewater, while the maximum concentration of carotenoids was obtained in 75% and 100% synthetic wastewater (20.1 ± 0.4 mg L −1 and 19.8 ± 0.1 mg L −1 , respectively) [ 47 ]. The authors noted that an increase in the concentration of wastewater increases the stress index, which may explain the intense accumulation of carotenoids in highly concentrated nutrient media.…”

Section: Resultsmentioning

confidence: 99%

Growth Efficiency of Chlorella sorokiniana in Synthetic Media and Unsterilized Domestic Wastewater

Bulynina

Ziganshina

Ziganshin

2023

BioTech

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Incorporating a variety of microalgae into wastewater treatment is considered an economically viable and environmentally sound strategy. The present work assessed the growth characteristics of Chlorella sorokiniana during cultivation in balanced synthetic media and domestic wastewater. Increasing the NH4+–N concentration to 360 mg L−1 and adding extra PO43−–P and SO42−–S (up to 80 and 36 mg L−1, respectively) contributed to an increase in the total biomass levels (5.7–5.9 g L−1) during the cultivation of C. sorokiniana in synthetic media. Under these conditions, the maximum concentrations of chlorophylls and carotenoids were 180 ± 7.5 and 26 ± 1.4 mg L−1, respectively. Furthermore, when studying three types of domestic wastewaters, it was noted that only one wastewater contributed to the productive growth of C. sorokiniana, but all wastewaters stimulated an increased accumulation of protein. Finally, the alga, when growing in optimal unsterilized wastewater, showed a maximum specific growth rate of 0.73 day−1, a biomass productivity of 0.21 g L−1 day−1, and 100% NH4+–N removal. These results demonstrate that the tested alga actively adapts to changes in the composition of the growth medium and accumulates high levels of protein in systems with poor-quality water.

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“…Generation of ethanol from algal feedstock has been an interesting research topic in recent days. A number of works on ethanol production using various algal feedstocks have been carried out [7,82]. Figure 4 illustrates the schematic representation of ethanol production from algal species.…”

Section: Production Of Bioethanol From Various Algal Speciesmentioning

confidence: 99%

“…Further, generated ethanol was characterized by GC-MS. Very recently, Onay and Aladag [7] used Scenedesmus acuminatus CCALA436 grown in wastewater and mepiquat chloride for the production of ethanol (Table 2). When compared with green algal species, the other groups of algal species are less focused with respect to ethanol production due to their variation in carbohydrate content.…”

Section: Cholerlla Vulgarismentioning

confidence: 99%

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Algae: The Reservoir of Bioethanol

Chandrasekhar,

Varaprasad,

Gnaneswari

et al. 2023

Fermentation

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Overuse of non-renewable fossil fuels due to the population explosion urges us to focus on renewable fuels such as bioethanol. It is a well-known fact that ethanol is useful as a blending product with common fuels such as petrol and diesel. This reduces the cost besides bringing down environmental pollution. Apart from chemical methods, bioethanol is generated from photosynthetic plants including algae, plant-based products, microbial organisms and their waste. Specifically, the production of ethanol from microalgal sources has been an attractive method in recent days. The reason behind using microalgal species is their simple structure with photosynthetic ability. In contrast, certain algal species often go disused in some regions. Hence, the production of ethanol from algal sources is one of the best waste management practices. Moreover, it is easy to improve the biomass in microalgal species by altering the physicochemical conditions such as light, pH, temperature, external supply of nutrients, vitamins, nano-sized particles, gene alterations etc., which will enhance ethanol production. In this review, the methods used for ethanol production are discussed. In addition, the factors involved in algal growth and ethanol production are emphasized. Overall, this review focuses on ethanol production from various algal species. This information will be useful for industrial-level production of ethanol and future renewable energy research.

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Production and use of Scenedesmus acuminatus biomass in synthetic municipal wastewater for integrated biorefineries

Cited by 7 publications

References 48 publications

Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N₂O Production

Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N₂O Production

Growth Efficiency of Chlorella sorokiniana in Synthetic Media and Unsterilized Domestic Wastewater

Algae: The Reservoir of Bioethanol

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Production and use of Scenedesmus acuminatus biomass in synthetic municipal wastewater for integrated biorefineries

Cited by 7 publications

References 48 publications

Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N2O Production

Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N2O Production

Growth Efficiency of Chlorella sorokiniana in Synthetic Media and Unsterilized Domestic Wastewater

Algae: The Reservoir of Bioethanol

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Product

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Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N₂O Production

Degradation of Chloroquine by Ammonia-Oxidizing Bacteria: Performance, Mechanisms, and Associated Impact on N₂O Production