Growth of microalgae Scenedesmus sp in ethanol vinasse

Ramirez, Nelzy Neyza Vargas; Farenzena, Marcelo; Trierweiler, Jorge Otávio

doi:10.1590/s1516-8913201401791

Cited by 52 publications

(22 citation statements)

References 13 publications

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“…Scenedesmus sp. was cultivated on a Guillard-modified medium supplemented with 40% of vinasse and has been reported as able to grow in rates comparable to the control experiments (Ramirez et al, 2014).…”

Section: Vinasse As a Feedstock For Biological Treatmentmentioning

confidence: 92%

Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Reis

2017

Front. Energy Res.

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Ethanol production from sugarcane in Brazil is a well-established industry, with relatively simple operations and high yield. The ethanol primarily serves as a renewable fuel blending with gasoline and diesel to increase the energy security in Brazil. Several environmental concerns are emerged around the by-products from this industry. Vinasse, the liquid fraction generated from the rectification and distillation operations of ethanol, is a sulfur-rich, low pH, dark-colored, and odorous effluent, produced at volumes as high as 20-fold of ethanol. Traditional wastewater treatments, such as bioprocessing, advanced oxidative processes, anaerobic digestion (AD), and chemical-based processes, have been applied to vinasse management. Despite most of its utilization being in fertirrigation practices, vinasse may represent a key factor in enhancing profitability and environmental outcomes of a sugarcane-to-ethanol plant. The application of some upgrade solutions to sugarcane-derived vinasse may represent additional sources of energy, production of animal feed components, and reduction in water consumption within a plant. The use of mature technologies, yet not widespread in the sugarcane-to-ethanol industry, could help attenuate environmental concerns. Oxidation and chemical processes, AD, and microbial fermentation have been presented as alternative impactful alternatives to (i) reduce its organic and mineral load, converting it to a feedstock with fewer environmental applications when applied as fertilizer and (ii) to convert organic matter and nutrients to a nutritious biomass, simultaneously increasing water reclamation potential by plants. This mini-review article provides a critical and comprehensive summary of the alternatives developed or under development to vinasse management.

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Section: Vinasse As a Feedstock For Biological Treatmentmentioning

confidence: 92%

Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Reis

2017

Front. Energy Res.

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“…In line with this assumption, industrial residues/ effluents are often pretreated in order to favor microalgae growth over contaminants. The pretreatment processes used can be simple dilutions, pH corrections and suspended solids settling as well as clarification, hydrolysis, ultraviolet irradiation, anaerobic digestion, filtration, heavy metals removal, among others [31,32,[56][57][58][59][60][61][62][63][64][65]84] (Table 2). In addition, a number of strategies can be deployed to mitigate contamination during the microalgae cultivating course [82,85,86].…”

Section: Microalgae Biomass Cultivationmentioning

confidence: 99%

Microalgae biorefineries: The Brazilian scenario in perspective

2017

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Biorefineries have the potential to meet a significant part of the growing demand for energy, fuels, chemicals and materials worldwide. Indeed, the bio-based industry is expected to play a major role in energy security and climate change mitigation during the 21th century. Despite this, there are challenges related to resource consumption, processing optimization and waste minimization that still need to be overcome. In this context, microalgae appear as a promising non-edible feedstock with advantages over traditional land crops, such as high productivity, continuous harvesting throughout the year and minimal problems regarding land use. Importantly, both cultivation and microalgae processing can take place at the same site, which increases the possibilities for process integration and a reduction in logistic costs at biorefinery facilities. This review describes the actual scenario for microalgae biorefineries integration to the biofuels and petrochemical industries in Brazil, while highlighting the major challenges and recent advances in microalgae large-scale production.

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“…Bejerinck [8], Chlorella sorokiniana [9], Chlamydomonas reinhardii [10], Tetraselmis suecica [8], Scenedemsus sp. [11] and Neochloris oleoabundans [12]. The influence of nutrients on the algae growth in raw or digested stillage is mostly studied [5,6,8,9,11,12].…”

Section: Introductionmentioning

confidence: 99%

“…[11] and Neochloris oleoabundans [12]. The influence of nutrients on the algae growth in raw or digested stillage is mostly studied [5,6,8,9,11,12]. However, the influence of chemical oxygen demand (COD) concentration on the algal growth is controversial.…”

Section: Introductionmentioning

confidence: 99%

“…Solovchenko et al [9] reported a high biomass concentration with 20 g/L of COD in stillage at the start of semi-batch Chlorella sorokiniana cultivation, while higher raw stillage contents up to 40% added to Guillard modified medium contributed positively to Scenedesmus sp. biomass production at a light intensity of 10000 lux [11]. Furthermore, even though digested samples have a significant presence of volatile fatty acids (VFA) which serve as an organic source of carbon [13], the production may need the add-on C-source in the form of NaHCO 3 [12] or CO 2 [5].…”

Section: Introductionmentioning

confidence: 99%

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Estimating the elemental biomass composition of Desmodesmus sp. cultivated in sugarcane stillage

Tasić¹,

Rios²,

Santos³

et al. 2016

Adv techn

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Cultivating algae on various stillage types present an alternative to current stillage application for fertirrigation of the sugarcane. The objective of this study was to determine how algal concentration, nutrient removal efficiency and elemental composition of Desmodesmus sp. algae change in response to different (raw and digested) types of stillage. Algal biomass was cultivated and harvested at laboratory scale. Obtained concentrations were 0.5 g/L and 0.3 g/L for Desmodesmus sp. grown in raw and digested stillage, respectively. At these concentrations, total carbon (TC) and total nitrogen (TN as Total Kjeldahl Nitrogen or N-TKN) removal from stillage medium accounted 39.78% and 5.58% for raw; 20.83% and 5.43% for digested stillage, respectively. The Desmodesmus sp. used in the present study contained high carbon and oxygen content, similar to other algal species. Calcium, phosphorus, and sulfur were the three most abundant inorganic elements. Both biomasses were free of chlorine and with the low content of potassium. The phosphorous content in both biomasses was in the range of 6.03%-6.84%, which could classify these biomasses as useful plant nutrients.

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Growth of microalgae Scenedesmus sp in ethanol vinasse

Abstract: ABSTRACT

Cited by 52 publications

References 13 publications

Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Microalgae biorefineries: The Brazilian scenario in perspective

Estimating the elemental biomass composition of Desmodesmus sp. cultivated in sugarcane stillage

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