scholarly journals Growth of Desmodesmus subspicatus green microalgae and nutrient removal from sugarcane vinasse clarified by electrocoagulation using aluminum or iron electrodes

DYNA ◽  
2019 ◽  
Vol 86 (211) ◽  
pp. 225-232
Author(s):  
Mauricio Daniel Montaño Saavedra ◽  
Flávia Paschino Bissoto ◽  
Roniel Augusto De Souza ◽  
Viktor Oswaldo Cárdenas Concha ◽  
Reinaldo Gaspar Bastos
Keyword(s):  
Electrode Materials ◽  
Biomass Productivity ◽  
Green Microalgae ◽  
Chemical Production ◽  
Microalgae Cultivation ◽  
Iron Electrodes ◽  
Desmodesmus Subspicatus ◽  
High Turbidity ◽  
Ph Neutralization ◽  
Sugarcane Vinasse

Sugarcane ethanol production generates considerable quantities of vinasse, its main wastewater. Microalgae cultivation is a promising option for effluent remediation, since the generated biomass can be feedstock for biofuel and bio-based chemical production. Due to vinasse high turbidity, pretreatment is necessary to clarify this effluent, adapting it as a mixotrophic culture medium. In this context, the present research evaluated the integrated process of electrocoagulation (EC) of sugarcane vinasse with aluminum or iron electrodes and subsequent cultivation of green microalgae Desmodesmus subspicatus. Results indicate pH neutralization and high turbidity removal efficiency by EC with both electrode materials. Aluminum EC and subsequent microalgae cultivation removed 66 and 75% of initial total organic carbon and total nitrogen, respectively, with biomass productivity of 1.45 g L-1day-1 and maximum specific growth rate of 0.095 h-1. Microalgae productivity was inferior in vinasse pretreated by iron EC, suggesting possible interference of ferric compounds in the microalgal development.

scholarly journals Development of a high-productivity, halophilic, thermotolerant microalga Picochlorum renovo

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Lukas R. Dahlin ◽  
Alida T. Gerritsen ◽  
Calvin A. Henard ◽  
Stefanie Van Wychen ◽  
Jeffrey G. Linger ◽  
...  
Keyword(s):  
Biomass Productivity ◽  
Downstream Processing ◽  
Culture Collection ◽  
Control Mechanisms ◽  
Tool Development ◽  
Chemical Production ◽  
Outdoor Cultivation ◽  
High Productivity ◽  
Chloroplast Genomes ◽  
Beneficial Traits

Abstract Microalgae are promising biocatalysts for applications in sustainable fuel, food, and chemical production. Here, we describe culture collection screening, down-selection, and development of a high-productivity, halophilic, thermotolerant microalga, Picochlorum renovo. This microalga displays a rapid growth rate and high diel biomass productivity (34 g m−2 day−1), with a composition well-suited for downstream processing. P. renovo exhibits broad salinity tolerance (growth at 107.5 g L−1 salinity) and thermotolerance (growth up to 40 °C), beneficial traits for outdoor cultivation. We report complete genome sequencing and analysis, and genetic tool development suitable for expression of transgenes inserted into the nuclear or chloroplast genomes. We further evaluate mechanisms of halotolerance via comparative transcriptomics, identifying novel genes differentially regulated in response to high salinity cultivation. These findings will enable basic science inquiries into control mechanisms governing Picochlorum biology and lay the foundation for development of a microalga with industrially relevant traits as a model photobiology platform.

scholarly journals Comparison of Biomass Productivity of Two Green Microalgae through Continuous Cultivation

KSBB Journal ◽  
2012 ◽  
Vol 27 (2) ◽  
pp. 97-102
Author(s):  
Geun-Ho Gim ◽  
Young-Mi Lee ◽  
Duk-Jin Kim ◽  
Sang-Hwa Jeong ◽  
Si-Wouk Kim
Keyword(s):  
Biomass Productivity ◽  
Continuous Cultivation ◽  
Green Microalgae

scholarly journals Cultivation of Chlorella vulgaris in Membrane-Treated Industrial Distillery Wastewater: Growth and Wastewater Treatment

2021 ◽  
Vol 9 ◽  
Author(s):  
Feng Li ◽  
David Kwame Amenorfenyo ◽  
Yulei Zhang ◽  
Ning Zhang ◽  
Changling Li ◽  
...  
Keyword(s):  
Chlorella Vulgaris ◽  
Environmentally Friendly ◽  
Biomass Productivity ◽  
Industrial Effluents ◽  
Treatment Method ◽  
Pollution Potential ◽  
Microalgae Cultivation ◽  
Microalgae Biomass ◽  
Distillery Wastewater ◽  
Removal Efficiencies

The alcohol industry discharges large quantities of wastewater, which is hazardous and has a considerable pollution potential. Cultivating microalgae in wastewater is an alternative way of overcoming the current high cost of microalgae cultivation and an environmentally friendly treatment method for industrial effluents. The study analyzed the growth and biochemical composition of Chlorella vulgaris cultivated in membrane-treated distillery wastewater (MTDW) and nutrients removal efficiency. The results showed biomass productivity of 0.04 g L−1 d−1 for MTDW with the contents of content of protein, carbohydrate, and lipid at 49.6 ± 1.4%, 26.1 ± 0.6%, and 10.4 ± 1.8%, respectively. The removal efficiencies of TN, TP, and COD were 80, 94, and 72.24% in MTDW, respectively. In addition, removal efficiencies of 100, 85.37, and 42.86% for Ca2+, Mg2+, and Mo2− were achieved, respectively. The study added to our growing knowledge on the cultivation of Chlorella with wastewater, suggesting that it was feasible to cultivate Chlorella with MTDW and represented an economical and environmentally friendly strategy for microalgae biomass production and reuse of wastewater resources.

scholarly journals Effect of the Carbon Concentration, Blend Concentration, and Renewal Rate in the Growth Kinetic ofChlorellasp.

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Adriano Arruda Henrard ◽  
Gabriel Martins da Rosa ◽  
Luiza Moraes ◽  
Michele Greque de Morais ◽  
Jorge Alberto Vieira Costa
Keyword(s):  
Specific Growth ◽  
Biomass Productivity ◽  
Cost Effective ◽  
Batch Cultivation ◽  
Maximum Specific Growth Rate ◽  
Residual Water ◽  
Microalgae Cultivation ◽  
Renewal Rate ◽  
Alternative Sources ◽  
Semicontinuous Cultivation

The microalgae cultivation can be used as alternative sources of food, in agriculture, residual water treatment, and biofuels production. Semicontinuous cultivation is little studied but is more cost-effective than the discontinuous (batch) cultivation. In the semicontinuous cultivation, the microalga is maintained in better concentration of nutrients and the photoinhibition by excessive cell is reduced. Thus, biomass productivity and biocompounds of interest, such as lipid productivity, may be higher than in batch cultivation. The objective of this study was to examine the influence of blend concentration, medium renewal rate, and concentration of sodium bicarbonate on the growth ofChlorellasp. during semicontinuous cultivation. The cultivation was carried out in Raceway type bioreactors of 6 L, for 40 d at 30°C, 41.6 µmol m−2 s−1, and a 12 h light/dark photoperiod. Maximum specific growth rate (0.149 d−1) and generating biomass (2.89 g L−1) were obtained when the blend concentration was 0.80 g L−1, the medium renewal rate was 40%, and NaHCO3was 1.60 g L−1. The average productivity (0.091 g L−1 d−1) was achieved with 0.8 g L−1of blend concentration and NaHCO3concentration of 1.6 g L−1, independent of the medium renewal rate.

scholarly journals Erratum to: Influence of photoperiods on the growth rate and biomass productivity of green microalgae

2014 ◽  
Vol 37 (10) ◽  
pp. 2137-2137 ◽  
Author(s):  
Izabela Krzemińska ◽  
Barbara Pawlik-Skowrońska ◽  
Magdalena Trzcińska ◽  
Jerzy Tys
Keyword(s):  
Growth Rate ◽  
Biomass Productivity ◽  
Green Microalgae

scholarly journals Screening of two freshwater green microalgae in pulp and paper mill wastewater effluents in Nova Scotia, Canada

2021 ◽  
Author(s):  
Shabana Bhatti ◽  
Robert Richards ◽  
Patrick McGinn
Keyword(s):  
Research Work ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Growth Potential ◽  
Nutrient Concentrations ◽  
Green Microalgae ◽  
Pulp And Paper Mill ◽  
Microalgae Cultivation ◽  
Nitrogen And Phosphorus ◽  
Microalgal Biomass

Abstract In recent years, the use of microalgae feedstock has gained renewed interest in which the biomass can be processed into many marketable products such as animal/aqua feeds, bioplastics and fertilizers due to their fast growth potential coupled with relatively high lipid, carbohydrate and nutrient content. An algal biorefinery at an industrial site has the potential to sustainably and profitably convert carbon dioxide emissions into microalgal biomass and concomitantly reduce nitrogen and phosphorus from wastewaters. Industrial wastewaters are a potential alternative to traditional media used for large-scale microalgae cultivation. Microalgae have been used for treating wastewaters in different industries by taking advantage of their high capacity to remove nitrogen and phosphorus in waste streams. Pulp and paper mills are major consumers of water resources and discharge a huge amount of water to nearby lakes or rivers. The current research work investigated whether pulp and paper mill waste water is suitable for microalgae cultivation with the aim to achieve significant biomass production. Six different process waters from one Canadian pulp and paper mill were tested with two freshwater green microalgae. All of these waters were unable to support growth of microalgae due to inadequate nutrient concentrations, colour, turbidity and possible toxicity issues.

Investigations of Light Intensities, Nutrient, and Carbon Sources Towards Microalgae Oil Production via Soxhlet Extraction Techniques

2021 ◽  
Vol 10 ◽  
Author(s):  
Wong Yee Ching ◽  
Nur Adilah Shukri
Keyword(s):  
Light Intensity ◽  
Carbon Sources ◽  
Light Condition ◽  
Biomass Productivity ◽  
Soxhlet Extraction ◽  
Extraction Yield ◽  
Future Research ◽  
Microalgae Cultivation ◽  
Microalgae Culture ◽  
Light Intensities

: This study was carried out to study the optimized condition for microalgae cultivation in terms of light intensity, nutrient supply, and a carbon source to optimize the microalgae growth to produce microalgae with high biomass productivity and have high lipid content. Microalgae cultivation was carried out with microalgae culture were cultivated under high light intensities and no light condition. The effect of light intensity, NPK fertilizer presence, and glucose presence on microalgae’s biomass production will be observed simultaneously. At the end of cultivation, MX2 obtained the highest biomass, and the biomass was being extracted, which produced 97.186 g of biomass. The oil extraction yield is 9.66%. GCMS analysis showed the presence of UFA and PUFA in the oil. Thus, future research is needed to improve the technique to increase the microalgae biomass and lipid in the future to become the potential feedstock for the production of biodiesel.

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