Energetic evaluation of wastewater treatment using microalgae, Chlorella vulgaris

Otondo, Alessandra; Kokabian, Bahareh; Stuart-Dahl, Savannah; Gude, Veera Gnaneswar

doi:10.1016/j.jece.2018.04.064

Cited by 81 publications

(22 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The biomass’ carbon/nitrogen ratio and biochemical methane potential were also characterized. The experiments were designed for 4 days, since previous literature data indicated that C. vulgaris entered stationary growth phase by the 4th–5th day, no significant biomass production could be observed thereafter ( Mujtaba et al, 2015 , 2017 ; Otondo et al, 2018 ; Qi et al, 2018 ) ( Supplementary Information ).…”

Section: Discussionmentioning

confidence: 99%

“…It was observed that microalgal growth rate is affected by the pH as pH affects the availability of inorganic carbon. When pH is around or over 10, CO 2 is limiting and bicarbonate is used as a carbon source (Otondo et al, 2018). The pH is slightly increased during the microalgal-bacterial biomass generation in all type of liquid wastes indicating effective photosynthetic activity of microalgae.…”

Section: Chlorella Vulgaris and Its Phycosphere Is Effective In Biorementioning

confidence: 99%

“…A number of studies examined municipal wastewater treatment efficiency using Chlorella-bacteria mixed cultures (Mujtaba et al, 2015;Otondo et al, 2018). More efficient nutrient removal was observed from settled domestic wastewater compared to the commonly used activated sewage process, which indicated the potential of microalgae in the activated sludge process potentially as a secondary step for further nutrient reduction and concomitant biomass production (Otondo et al, 2018). Besides, CO 2 originated from the degradation of carbonaceous matter in an activated sludge process is released freely into the atmosphere, thus promoting GHG accumulation.…”

Section: Introductionmentioning

confidence: 99%

“…This inexpensive and environment-friendly system can contribute to the sustainable management of water resources ( Liu J. et al, 2017 ; Qi et al, 2018 ). The green microalgae Chlorella vulgaris is the most investigated eukaryotic algae species in wastewater treatment ( Chiu et al, 2015 ; Otondo et al, 2018 ; Shetty et al, 2019 ). C. vulgaris is a common eukaryotic microalgae species found in various natural and engineered freshwater and soil habitats.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Chlorella vulgaris and Its Phycosphere in Wastewater: Microalgae-Bacteria Interactions During Nutrient Removal

Wirth

Pap

Böjti

et al. 2020

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

Microalgae-based bioenergy production is a promising field with regard to the wide variety of algal species and metabolic potential. The use of liquid wastes as nutrient clearly improves the sustainability of microalgal biofuel production. Microalgae and bacteria have an ecological inter-kingdom relationship. This microenvironment called phycosphere has a major role in the ecosystem productivity and can be utilized both in bioremediation and biomass production. However, knowledge on the effects of indigenous bacteria on microalgal growth and the characteristics of bacterial communities associated with microalgae are limited. In this study municipal, industrial and agricultural liquid waste derivatives were used as cultivation media. Chlorella vulgaris green microalgae and its bacterial partners efficiently metabolized the carbon, nitrogen and phosphorous content available in these wastes. The read-based metagenomics approach revealed a diverse microbial composition at the start point of cultivations in the different types of liquid wastes. The relative abundance of the observed taxa significantly changed over the cultivation period. The genome-centric reconstruction of phycospheric bacteria further explained the observed correlations between the taxonomic composition and biomass yield of the various waste-based biodegradation systems. Functional profile investigation of the reconstructed microbes revealed a variety of relevant biological processes like organic acid oxidation and vitamin B synthesis. Thus, liquid wastes were shown to serve as valuable resources of nutrients as well as of growth promoting bacteria enabling increased microalgal biomass production.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Chlorella Vulgaris and Its Phycosphere Is Effective In Biorementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chlorella vulgaris and Its Phycosphere in Wastewater: Microalgae-Bacteria Interactions During Nutrient Removal

Wirth

Pap

Böjti

et al. 2020

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…The data obtained suggest that microalgae performance in this system did not depend on the time of day when light was applied or the length of the photoperiods, but on the net photon flux. No photoinhibiton was * Constant energy consumption of 0.8 KwhSolar light is the most economical option for outdoor microalgae cultivation [24,39], but variations in the weather, day:night cycles and seasonal changes affect light intensity…”

mentioning

confidence: 99%

Effect of light intensity, light duration and photoperiods in the performance of an outdoor photobioreactor for urban wastewater treatment

et al. 2019

View full text Add to dashboard Cite

A series of eight experiments were carried out to analyse the effects of light intensity, light duration and photoperiods on a microalgae culture for treating AnMBR effluent at an outdoor photobioreactor (PBR) plant.Improved performance was achieved in terms of nutrient recovery rates, biomass productivity and effluent nutrient concentrations at a higher net photon flux. However, the higher irradiance was also responsible for lower biomass productivity:light irradiance ratios.None of the experiments with different lighting regimes and the same net photon flux showed any significant differences. The data obtained suggest that microalgae performance in this system did not depend on the time of day when light was applied or the length of the photoperiods, but on the net photon flux. No photoinhibiton was * Constant energy consumption of 0.8 KwhSolar light is the most economical option for outdoor microalgae cultivation [24,39], but variations in the weather, day:night cycles and seasonal changes affect light intensity

show abstract

Upcycling food waste as a low‐cost cultivation medium for Chlorella sp. microalgae

Ramandani,

Sun,

Lan

et al. 2024

J Sci Food Agric

View full text Add to dashboard Cite

BACKGROUNDGlobal food loss and waste have raised environmental concerns regarding the generation of greenhouse gases (e.g., carbon dioxide and methane gas), which directly contribute to climate change. To address these concerns, the present research aims to upcycle food waste into an alternative culture medium for the cultivation of microalgae. Various parameters including pretreatment of food waste (i.e., autoclave and non‐autoclave), concentration of food waste culture medium (i.e., 10%, 30%, 50%, 70%, 90% and 100%), harvesting efficiency and biochemical compounds of Chlorella sp. microalgae were carried out.RESULTSBased on the preliminary findings, the highest biomass concentration obtained from 10% food waste culture medium in the autoclave for Chlorella sp., including strains FSP‐E, ESP‐31 and CY‐1, were 2.869 ± 0.022, 2.385 ± 0.018 and 0.985 ± 0.0026 g L−1, respectively. Since Chlorella vulgaris FSP‐E exhibited the highest biomass concentration, this microalgal strain was selected to examine the subsequent parameters. Cultivation of C. vulgaris FSP‐E in 100FW achieves a biomass concentration of 4.465 ± 0.008 g L−1 with biochemical compounds of 6.94 ± 1.396, 248.24 ± 0.976 and 406.23 ± 0.593 mg g−1 for lipids, carbohydrates and proteins, respectively.CONCLUSIONThis study shows that using food waste as an alternative culture medium for C. vulgaris FSP‐E can achieve substantial biomass productivity and biochemical content. This research work would contribute to the concept of net zero emission and transitioning toward a circular bioeconomy by upcycling food waste as an alternative culture medium for the cultivation of microalgae. © 2024 Society of Chemical Industry.

show abstract

Energetic evaluation of wastewater treatment using microalgae, Chlorella vulgaris

Cited by 81 publications

References 49 publications

Chlorella vulgaris and Its Phycosphere in Wastewater: Microalgae-Bacteria Interactions During Nutrient Removal

Chlorella vulgaris and Its Phycosphere in Wastewater: Microalgae-Bacteria Interactions During Nutrient Removal

Effect of light intensity, light duration and photoperiods in the performance of an outdoor photobioreactor for urban wastewater treatment

Upcycling food waste as a low‐cost cultivation medium for Chlorella sp. microalgae

Contact Info

Product

Resources

About