Microalgal biorefineries: Integrated use of liquid and gaseous effluents from bioethanol industry for efficient biomass production

Sydney, Eduardo Bittencourt; Neto, Carlos José Dalmas; Carvalho, Júlio César de; Vandenberghe, Luciana Porto de Souza; Sydney, Alessandra Cristine Novak; Letti, Luiz Alberto Júnior; Karp, Susan Grace; Soccol, Vanete Thomaz; Woiciechowski, Adenise Lorenci; Medeiros, Adriane Bianchi Pedroni; Soccol, Carlos Ricardo

doi:10.1016/j.biortech.2019.121955

Cited by 27 publications

(10 citation statements)

References 19 publications

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“…in 100% clarified vinasse. Montalvo et al (2019, p.103) and Sydney et al (2019) reported the best results with algal biomass production in vinasse (3.01g l-1 and 2.5g l-1, respectively). The authors used different strategies.…”

Section: Resultsmentioning

confidence: 96%

“…All these pretreatments have the objective of reducing the vinasse organic loading and turbidity. Botryococcus braunii showed a good growth performance in 100% vinasse pretreated with alkali (SYDNEY et al, 2019). Beigbeder et al (2019, p.257) cultivated Chlorella vulgaris in centrifuged vinasse and Santana et al (2016Santana et al ( , p.2133) cultivated Chlamydomonas biconvexa and Micractinium sp.…”

Section: Resultsmentioning

confidence: 99%

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Upcycling glycerin and vinasse by means of microalgae cultivation.

Conceição

Chinalia

2021

Ambiente (Boa Vista)

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In 2019, the biodiesel / ethanol biofuels sector generated glycerol and vinasse by-products in significant quantities (476 million and 466 billion liters, respectively). Therefore, it is necessary to reuse or treat these products to reduce their environmental impacts. Using them to support the cultivation of microalgae is a sustainable way of valuing and treating these residues. The objective of this work is to systematize the scientific articles that report their use for the cultivation of microalgae and, consequently, the type of algal bioproducts commonly obtained. Glycerol can be used as a source of carbon in algal mixotrophic growth and, therefore, it can increase algal biomass production. The same process can happen with several small molecular weight substances present in the vinasse, but the concentration of nitrogen and phosphorus is what makes such effluent attractive for the algal cultivation process. Although there are scientific studies describing the use of these substances for algal growth, this work highlights that they vary significantly according to the reports regarding the operation of such culturing system.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Upcycling glycerin and vinasse by means of microalgae cultivation.

Conceição

Chinalia

2021

Ambiente (Boa Vista)

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“…This is due to the high concentrations of certain compounds in effluents, which can damage the microalgae osmoregulation and metabolic processes [80]. It is necessary, thus, to slowly adapt the cultures through sequential inoculations into media with increasing effluent concentrations, as was the case, for example, of the study of Sydney et al [81], in which microalgae of the genus Botryococcus, Synechococcus, Chlorella, Neochloris, Scenedesmus, and Arthrospira were inoculated initially in 10% vinasse media and afterward in 20% and 30% concentrations. High inoculum concentrations can also help with culture competition, and previous adaptation to external conditions can be made before inoculation into large volumes of effluent [82].…”

Section: Vinassementioning

confidence: 99%

“…Beyond wastewater and solid residues in the agro-industry, discussions can expand to the issue of gaseous effluents and the development of bioprocesses that play an important role in the treatment, since they are considered one of the primary sources of emissions and contamination in the industrial process [81,165]. One of the emission sources originates from burning biomass or fossil fuels, where coal is widely used as an energy source [166][167][168][169][170].…”

Section: Co 2 Fixation and Biogas Upgradingmentioning

confidence: 99%

Agro-Industrial Wastewaters for Algal Biomass Production, Bio-Based Products, and Biofuels in a Circular Bioeconomy

et al. 2022

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Recycling bioresources is the only way to sustainably meet a growing world population’s food and energy needs. One of the ways to do so is by using agro-industry wastewater to cultivate microalgae. While the industrial production of microalgae requires large volumes of water, existing agro-industry processes generate large volumes of wastewater with eutrophicating nutrients and organic carbon that must be removed before recycling the water back into the environment. Coupling these two processes can benefit the flourishing microalgal industry, which requires water, and the agro-industry, which could gain extra revenue by converting a waste stream into a bioproduct. Microalgal biomass can be used to produce energy, nutritional biomass, and specialty products. However, there are challenges to establishing stable and circular processes, from microalgae selection and adaptation to pretreating and reclaiming energy from residues. This review discusses the potential of agro-industry residues for microalgal production, with a particular interest in the composition and the use of important primary (raw) and secondary (digestate) effluents generated in large volumes: sugarcane vinasse, palm oil mill effluent, cassava processing waster, abattoir wastewater, dairy processing wastewater, and aquaculture wastewater. It also overviews recent examples of microalgae production in residues and aspects of process integration and possible products, avoiding xenobiotics and heavy metal recycling. As virtually all agro-industries have boilers emitting CO2 that microalgae can use, and many industries could benefit from anaerobic digestion to reclaim energy from the effluents before microalgal cultivation, the use of gaseous effluents is also discussed in the text.

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“…Vinasse from the ethanol industry is rich in inorganic nutrients and low complexity organics, thus potentially suitable for sustaining microalgal systems (Beigbeder, et al, 2019). The main strategy to develop a microalgal system for treating vinasse is preadapting the cells to the effluent (Sydney, et al, 2019). Vinasse turbidity has been identified as a significant variable affecting algal growth.…”

Section: Overview Of Scientific Literaturementioning

confidence: 99%

Microalgae as agents for upcycling industrial wastewater: energy patents and scientific literature overview

Conceição

Santos

Silva

et al. 2022

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The oil/gas, ethanol, biodiesel and biogas industries generate wastewater known as produced water, vinasse, crude glycerin and methanogenic digester´s based effluents, respectively. Microalgal systems have been suggested as a suitable and adaptable biological approach for the treatment of such wastewaters. The advantage of such an approach is the combination of treatment with the accumulation of algal valuable bioproducts. This systematic literature review aims to analyze scientific and patent production with bibliometric analysis. Another aim is to discuss the algal bioremediation strategies that were adopted by the cited industries for treating their distinct effluents. Data was obtained using scientific papers and patents published between 2000 to 2020 (335 scientific papers and 104 patents). The United States contributed with the largest number of articles, followed by China and Brazil. Meanwhile China, South Korea and the United States are the major owners of patents. This work identified that microalgal based system is successful in bioremediating several pollutants and that glycerol significantly improves algal performance for bioproducts production. Nonetheless, the efficiency of this process is hindered either by the adopted strategy applied before the cultivation stage or after this process. For instance, variables such as nutrient supplementation, turbidity and salinity corrections were identified as pivotal for process performance. Thus, the full-scale process is directly associated to the correct integration of wastewater production and proper management of microalgae systems.

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Microalgal biorefineries: Integrated use of liquid and gaseous effluents from bioethanol industry for efficient biomass production

Cited by 27 publications

References 19 publications

Upcycling glycerin and vinasse by means of microalgae cultivation.

Upcycling glycerin and vinasse by means of microalgae cultivation.

Agro-Industrial Wastewaters for Algal Biomass Production, Bio-Based Products, and Biofuels in a Circular Bioeconomy

Microalgae as agents for upcycling industrial wastewater: energy patents and scientific literature overview

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