文章基本信息

标题：Otimização e comparação qualitativa de dois pré-tratamentos da vinhaça visando ao cultivo de microalgas
其他标题：Optimization and qualitative comparison of two vinasse pre-treatments aiming at microalgae cultivation
本地全文：下载
作者：Candido, Camila ; Bernardo, André ; Lombardi, Ana Teresa 等
期刊名称：Engenharia Sanitaria e Ambiental
印刷版ISSN：1413-4152
电子版ISSN：1809-4457
出版年度：2021
卷号：26
期号：2
页码：359-367
DOI：10.1590/s1413-415220190306
出版社：ABES
摘要：The cultivation of microalgae is a possible destination for vinasse, a residue from the sugar and alcohol industry. This use can help reduce the costs of microalgae production and remediate this residue rich in nutrients. However, the physicochemical characteristics of vinasse limit its use for microalgae growth at low concentrations, except when the residue is pretreated. This work aimed at optimizing the vinasse pretreatments of centrifugation and adsorption by smectite clay and activated charcoal on laboratory scale in terms of amounts of materials used and time spent, making them more viable on larger scales. The optimized processes were then compared in productive, economic, and environmental terms. The dilution of treated vinasse with distilled water resulted in similar growth of Chlorella vulgaris to those obtained with the dilution in BG11 medium, indicating that the addition of nutrients in culture media is not necessary. Although microalgae growth occurs in higher concentrations of vinasse treated by adsorption, the results show that centrifugation required less processing time, has cheaper processing costs, and generated much less residue. Centrifugation treatment has greater economic and environmental viabilities and was more sustainable than the adsorption, even though the algae did not grow in the centrifuged residue in concentrations as high as it did after the adsorption treatment. Therefore, this article brings a new view about the economic and environmental aspects on the use of pretreated vinasse for microalgal growth, giving a lucrative destination for a highly polluting waste.
关键词：uso de resíduos;tratamentos físico-químicos;produção sustentável;biomassa de algas
其他关键词：waste use;physicochemical treatments;sustainable production;algae biomass