{"title":"Optimization and scale-up of the spray drying process for Euglena gracilis","authors":"","doi":"10.1016/j.algal.2024.103640","DOIUrl":null,"url":null,"abstract":"<div><p>The study presents a spray drying process for <em>Euglena gracilis</em>. Concentrate obtained by a disc centrifuge was used as the starting material. The process was established and scaled up using pilot and production-scale spray drying towers. Optimal conditions for the pilot scale included an inlet temperature of 200 °C, an outlet temperature of 85 °C, and a solid mass fraction of <em>E. gracilis</em> mud of 12 %. Key parameters influencing <em>E. gracilis</em> powder physicochemical indexes were identified by correlation analysis as drying time for droplets (<em>T</em><sub><em>drying</em></sub>), which can be adjusted by the outlet air temperature, the Peclet number for mass (<em>Pe</em><sub><em>mass</em></sub>), and heat (<em>Pe</em><sub><em>heat</em></sub>), and the evaporation rate (<span><math><mfrac><msub><mi>d</mi><mi>w</mi></msub><msub><mi>d</mi><mi>t</mi></msub></mfrac></math></span>), all of which can be adjusted by the outlet temperature. The process was successfully scaled up by optimizing the outlet temperature, achieving a productivity of 36.63 kg·h<sup>−1</sup> and a yield of 98.35 %. This work offers a commercially viable method for large-scale <em>E. gracilis</em> powder production.</p></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Algal Research-Biomass Biofuels and Bioproducts","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2211926424002522","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The study presents a spray drying process for Euglena gracilis. Concentrate obtained by a disc centrifuge was used as the starting material. The process was established and scaled up using pilot and production-scale spray drying towers. Optimal conditions for the pilot scale included an inlet temperature of 200 °C, an outlet temperature of 85 °C, and a solid mass fraction of E. gracilis mud of 12 %. Key parameters influencing E. gracilis powder physicochemical indexes were identified by correlation analysis as drying time for droplets (Tdrying), which can be adjusted by the outlet air temperature, the Peclet number for mass (Pemass), and heat (Peheat), and the evaporation rate (), all of which can be adjusted by the outlet temperature. The process was successfully scaled up by optimizing the outlet temperature, achieving a productivity of 36.63 kg·h−1 and a yield of 98.35 %. This work offers a commercially viable method for large-scale E. gracilis powder production.
期刊介绍:
Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment