A new methodology to determine kLa in airlift reactors based on a non-intrusive image analysis technique

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-03-21 DOI:10.1002/jctb.7836

Javier Saleh-Cumsille, Pedro Cruz, Cesar Huiliñir, Felipe Scott, Alberto Vergara-Fernández

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引用次数: 0

Abstract

BACKGROUND

This article proposes a new methodology for calculating k_La in airlift reactors (ALRs) based on a digital imaging technique and Higbie's model. Four ARLs with different internal diameters (28, 37.4, 45, and 55 mm) were used to determine the aeration patterns, velocities, and size distributions of the bubbles. Video recordings lasting 10 s were recorded using a 1080p slow-motion camera at 240 frames per second (fps). In 100 frames per video, between 500 and 599 frames, the characteristics of the bubbles were captured and then processed using the sci-kit-image Python package.

RESULTS

The Higbie model coupled with image analysis was used to determine k_L, and was then compared with the experimental values and k_La correlations. As a result, bubble velocities between 0.2 and 0.8 m s⁻¹ were determined.

CONCLUSIONS

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一种基于非侵入式图像分析技术的气升式反应器kLa测定新方法

本文提出了一种基于数字成像技术和Higbie’s模型计算气升式反应器kLa的新方法。采用4个不同内径（28、37.4、45和55 mm）的arl测定气泡的曝气模式、速度和尺寸分布。使用每秒240帧的1080p慢动作摄像机记录了持续10秒的视频记录。在每个视频的100帧中，在500到599帧之间，气泡的特征被捕获，然后使用scikit -image Python包进行处理。结果采用Higbie模型结合图像分析确定kL，并与实验值和kLa相关性进行比较。结果，气泡速度在0.2和0.8 m s - 1之间。结论新方法计算的kLa值（20 ~ 28 h−1）与实验值接近，并与alr的相关性进行了比较。©2025化学工业学会（SCI）。

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

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.