Simultaneous removal of pollutants and high value biomaterials production by Chlorella variabilis TH03 from domestic wastewater

Tran, Dang Thuan; Do, Thi Cam Van; Nguyen, Quang Trung; Le, Giang Truong

doi:10.1007/s10098-020-01810-5

Cited by 30 publications

(13 citation statements)

References 47 publications

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“…Tran et al. (2021) used Chlorella vulgaris ( C. vulgaris ) TH03 for the remediation of domestic wastewater. During their investigation, COD (74.8%–89.8%), total nitrogen (TN) (93.8%–96.1%) total phosphorus (TP) (97.1%–99.9%) was removed from domestic wastewater and showed an elevated level of biomass production (1.52–1.72 g/L).…”

Section: Microalgae‐based Wastewater Bioremediation Approachmentioning

confidence: 99%

Microalgal‐based remediation of wastewater: A step towards environment protection and management

Goswami

Agrawal

Verma

2022

Environmental Quality Mgmt

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The widespread problem of water pollution is jeopardizing the ecosystem and our health. The contamination of freshwater through anthropogenic activities and its discharge into the ecosystems leads to the generation of wastewater. Wastewater mainly contains nutrient loads and the recent emerging contaminants such as pharmaceutical wastes, drugs, micropollutants, heavy metals, pesticides, phenolic compounds, and dyes have increased and contaminated the aquatic bodies. The existence of these emerging pollutants can cause serious threats to ecosystems and humans. Thus, conventional wastewater treatment was focused on the removal of solid compounds or nutrient loads. However, it could not remove the emerging contaminants and later microalgae that are photosynthetic eukaryotic microorganisms were found to be an efficient and eco‐friendly source for the remediation of diverse kinds of wastewater. Apart from nutrient removal, the algal biomass acts as the efficient feedstock for the generation of bioenergy products. However, limited data have been published regarding the remediation of emerging pollutants through microalgae. Thus, focusing on the recent gaps, the current review provides an overview of the potential of microalgae for the remediation of nutrient loads. Critically deliberate the recent advances and detailed summary of microalgae potential for the remediation of wastewaters containing high nutrient loads especially focused on the remediation of different emerging contaminants. It highlights the advanced approaches used in the microalgae remediation process and provides comprehensive information about the different bioenergy products such as liquid, gaseous, and bioelectricity generated through the utilization of wastewater‐grown microalgae.

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Section: Microalgae‐based Wastewater Bioremediation Approachmentioning

confidence: 99%

Microalgal‐based remediation of wastewater: A step towards environment protection and management

Goswami

Agrawal

Verma

2022

Environmental Quality Mgmt

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“…e phototrophic growth variables including light intensity, light dark cycle, temperature, and CO 2 aeration rate were controlled at 115 μmol/m 2 •s, 16 h/8 h, 27°C, and 0.1 vvm (CO 2 2%), respectively [26]. Algal biomass production under salt stress was performed using NaCl concentration of 5, 10, 15, and 20 g/L.…”

Section: Microalgalmentioning

confidence: 99%

“…e experiment was performed in triplicate (n � 3). e outdoor cultivation of C. sorokiniana TH01 in 500 L BG-11 was performed in a raceway pond under a greenhouse following a protocol as described in Tran et al [26]. e daily light and temperature variation of the outdoor cultivation was 560013340 lux and 23.4-27.5°C, respectively.…”

Section: Microalgalmentioning

confidence: 99%

“…is study used a raceway pond of 3.785 m 2 [26] for pilot production of C. sorokiniana TH01 in BG-11 medium under outdoor conditions. Data revealed in Table 3 indicate that C. sorokiniana TH01 achieved specific growth rate, biomass concentration, and lipid content of 0.65 1/day, 0.93 g/L, and 22.34% DCW, respectively; these are comparable to those obtained when C. sorokiniana TH01 is grown phototrophically under indoor conditions.…”

Section: Effect Of Glucose Concentration On Growth Profile Andmentioning

confidence: 99%

“…However, the utilization of whole algal biomass for the crop production purpose only might be wasteful. is is because microalgal biomass is considered as a high-value biomaterial which usually contains large content of lipids and/or carbohydrates and proteins [26]. In regard to biorefinery, microalgal lipids and carbohydrates are promising feedstocks for liquid biofuel (biodiesel, bioethanol, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Endogenous Auxins and Gibberellins Produced by Chlorella sorokiniana TH01 under Phototrophic and Mixtrophic Cultivation Modes toward Applications in Microalgal Biorefinery and Crop Research

Tran

et al. 2020

Journal of Chemistry

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Microalgae have been reported to produce endogenous phytohormones including auxins, gibberellins, cytokinins, brassinosteroids, and abscisic acid. Methanol residual released from microalgal lipid extraction usually contains a variety of bioactive compounds including the phytohormones; however, they are poorly characterized and used for other applications. This study aimed at investigating auxin, gibberellin, and cytokinin production of C. sorokiniana TH01 under phototrophic and mixtrophic cultivations. Moreover, endogenous auxins, gibberellins, and cytokinins in methanol residual obtained from the algal lipid extraction were characterized using HPLC-ESI-MS/MS toward application for crop and biorefinery research. Data showed that endogenous indole-3-acetic acid (IAA), 3-indolepropionic acid (IPA), gibberellin A4 (GA4), and gibberellin A7 (GA7) were detected in C. sorokiniana TH01 biomass. Under the phototrophic mode, total auxin and GA levels were reduced to 0.98 and 9.65 μg/g DW under salt stress (20 g NaCl/L) from 3.59 to 24.71 μg/g DW, respectively, measured for the control. Similarly, total auxins and GAs were also decreased to 0.56 and 2.86 μg/g DW, respectively, under mixtrophic growth with 6 g glucose/L. Total auxins and GAs determined in the water algal extract were 1062.7 and 2000.1 μg/L, respectively. Treatment with higher 40% (v/v) of the algal extract triggered earlier seed germination of rice and tomato plants in 2 and 1 days, respectively. Our new findings in capability of C. sorokiniana TH01 in endogenous phytohormone production contain fundamental merits for further optimization of the algal production (i.e., cultivation modes, conditions, lipids, biomass productivity, and hormone levels) to be used for biorefinery.

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Developing a mini biodiesel production line via sequential conversion to purification from Scenedesmus acuminatus S4 grown in domestic wastewater

Tran

Nhung

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUNDFull demonstrations of the production of microalgal biodiesel from conversion to purification have been reported only rarely in the literature. This study was aimed at developing a mini production line consisting of sequential conversion, extraction and purification of biodiesel from Scenedesmus acuminatus S4 grown in domestic wastewater.RESULTSThe data showed that the separated conversion‐extraction (SCE) produced biodiesel with high yield (99.9%) and purity (87.5%) at 200 g L–1 biomass loading, 5% H2SO4/methanol (v/v) catalyst loading, 100 °C reaction temperature and 200 rpm stirring rate, in a 1 h conversion reaction, followed by extraction with hexane (10 mL:1 g dry cell weight) by mixing for 10 min (200 rpm) at 25 °C. The integrated conversion‐extraction (ICE) performed by simultaneous addition of hexane to the biomass and the catalytic solution mixture under the optimized conditions, achieved biodiesel yield and purity of 91.9% and 81.4%, respectively. Crude biodiesel was purified by 40% (w/v) adsorbents [Magnesol and D‐sol® (D60)]/crude biodiesel achieving >95% fatty acid methyl esters (FAME) purity, which is superior to the results in the literature and equivalent to fuel grade standard.CONCLUSIONSFuel grade biodiesel was successfully produced from S. acuminatus S4 via sequential steps of direct conversion, extraction and purification. The conversion step can be performed via SCE or ICE followed by extraction to obtain crude biodiesel (99% yield and 87.5% purity), whereas the purification step was implemented by dry‐washing with Magnesol or D‐sol® (D60) to >95% FAME. The current production line has technical merits that need to be further optimized for large‐scale application. © 2020 Society of Chemical Industry

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Simultaneous removal of pollutants and high value biomaterials production by Chlorella variabilis TH03 from domestic wastewater

Cited by 30 publications

References 47 publications

Microalgal‐based remediation of wastewater: A step towards environment protection and management

Microalgal‐based remediation of wastewater: A step towards environment protection and management

Characterization of Endogenous Auxins and Gibberellins Produced by Chlorella sorokiniana TH01 under Phototrophic and Mixtrophic Cultivation Modes toward Applications in Microalgal Biorefinery and Crop Research

Developing a mini biodiesel production line via sequential conversion to purification from Scenedesmus acuminatus S4 grown in domestic wastewater

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