{"title":"Different organic carbon sources affect microalgal growth and extracellular polymeric substances synthesis to trigger biomass flocculation process","authors":"","doi":"10.1016/j.seppur.2024.129846","DOIUrl":null,"url":null,"abstract":"<div><div>The addition of organic carbon sources into the culture medium represents an effective strategy for microalgae cultivation. However, its influence on the subsequent flocculation process remains poorly understood. In this study, four representative organic carbon sources were supplemented to microalgal cultures with the aim of evaluating their potential to enhance biomass accumulation, optimize fatty acid composition and improve phototolerance. The results demonstrated that the addition of ethanol, sodium acetate, glucose and fructose to the cultures resulted in extracellular protein contents of 90.9, 125.7, 67.5 and 46.0 mg/g, respectively, compared to 36.8 mg/g observed in the control culture with pure BG-11 medium. The addition of organic carbon sources led to alterations in protein content and the composition ratio of charged groups within the extracellular polymeric substances of microalgae, which in turn influenced the flocculation process. This study provides valuable insights into the selection of appropriate organic carbon sources for promoting microalgal growth and clarifies the flocculation mechanisms under various carbon utilization strategies.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1383586624035858","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The addition of organic carbon sources into the culture medium represents an effective strategy for microalgae cultivation. However, its influence on the subsequent flocculation process remains poorly understood. In this study, four representative organic carbon sources were supplemented to microalgal cultures with the aim of evaluating their potential to enhance biomass accumulation, optimize fatty acid composition and improve phototolerance. The results demonstrated that the addition of ethanol, sodium acetate, glucose and fructose to the cultures resulted in extracellular protein contents of 90.9, 125.7, 67.5 and 46.0 mg/g, respectively, compared to 36.8 mg/g observed in the control culture with pure BG-11 medium. The addition of organic carbon sources led to alterations in protein content and the composition ratio of charged groups within the extracellular polymeric substances of microalgae, which in turn influenced the flocculation process. This study provides valuable insights into the selection of appropriate organic carbon sources for promoting microalgal growth and clarifies the flocculation mechanisms under various carbon utilization strategies.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.