Effects of leachate concentration, carbon dioxide and aeration flow rate on chlorophyll and carotenoid productivity and bioremediation potential of the microalga Chlorella minutissima

IF 1 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2023-10-27 DOI:10.17159/wsa/2023.v49.i4.4027

None Wallyson Ribeiro dos Santos, None Priscila Pereira, None Lucrécio Fábio dos Santos, None Geronimo Virginio Tagliaferro, None Daniela HP Guimarães

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引用次数: 0

Abstract

The use of microalgae cultures to process effluents from industries, leachates, and tanneries, among others, quantified by the reduction of metallic materials in the medium and the reduction of chemical oxygen demand (COD), helps reduce the environmental impact caused by human development. In addition, with the growth of the culture, it is possible to produce a significant amount of chlorophyll, a carotenoid of high value in the cosmetics and food industries that are used as a natural pigment. In this context, this work presents a study conducted to verify the bioremediation and chlorophyll production potential of the cultivation of the microalgae Chlorella minutíssima, using the Taguchi method. The microalgae Chlorella minutissima has given good results in the bioremediation of leachate, as a mean reduction of 33% in COD was obtained, as well as a 92% reduction in the toxic components. In addition, statistical analysis revealed that the four process factors were significant factors for chlorophyll a, chlorophyll b and carotenoid productivity (p < 0.05). Finally, it was observed that the maximum chlorophyll a (111.9 ± 0.8 mg‧L−1‧d−1), chlorophyll b (66.1 ± 1.7 mg‧L−1‧d−1), and carotenoid (31.9 ± 0.03 mg‧L−1‧d−1) values obtained occurred in Experiment 8, which is closer to the ideal conditions identified by statistical analysis, revealing the effectiveness of the use of the Taguchi method for the design of experiments.

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渗滤液浓度、二氧化碳和曝气流量对微小小球藻叶绿素和类胡萝卜素产量及生物修复潜力的影响

使用微藻培养物来处理工业、渗滤液和制革厂的废水，除其他外，通过减少介质中的金属材料和减少化学需氧量(COD)来量化，有助于减少人类发展对环境造成的影响。此外，随着培养物的生长，有可能产生大量的叶绿素，这是一种在化妆品和食品工业中作为天然色素使用的高价值的类胡萝卜素。在此背景下，本工作提出了一项研究，以验证微藻小球藻minutíssima的生物修复和叶绿素生产潜力，采用田口法。微藻小球藻对渗滤液的生物修复效果良好，COD平均降低33%，有毒成分平均降低92%。此外，统计分析表明，4种工艺因素对叶绿素a、叶绿素b和类胡萝卜素产量均有显著影响(p <0.05)。最后，实验8中叶绿素a(111.9±0.8 mg·L·1·d·1)、叶绿素b(66.1±1.7 mg·L·1·d·1)和类胡萝卜素(31.9±0.03 mg·L·1·d·1)值最大，接近统计分析确定的理想条件，表明使用田口法设计实验的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).