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Related Experiment Video

Updated: Jan 25, 2026

An Obstructive Chronic Pancreatitis Model Established Through Electrocoagulation

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Published on: October 31, 2025

Improving electrocoagulation floatation for harvesting microalgae.

Andrew Landels^1,2, Tracey A Beacham², Christopher T Evans^2,3

¹Department of Plant Sciences, Rothamsted Research, Harpenden AL5 2JQ, UK.

|May 7, 2019

Summary

This summary is machine-generated.

Electro-coagulation floatation (ECF) offers rapid, scalable microalgae separation and sterilization. This study details ECF

Keywords:

Electro-coagulation floatation Flocculant High speed atomic force microscopy Hydrothermal liquefaction Microalgae Microbubble Separation

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Area of Science:

Biotechnology and biochemical engineering
Separation science
Environmental technology

Background:

Microalgae harvesting is crucial for industrial biotechnology.
Existing methods like centrifugation are energy-intensive and costly.
Electro-coagulation floatation (ECF) presents a promising alternative separation technology.

Purpose of the Study:

To analyze the parameters of electro-coagulation floatation (ECF) for microalgae separation.
To investigate ECF's effectiveness across various microalgal species and conditions.
To explore process improvements for industrial biotechnology applications.

Main Methods:

Electro-coagulation floatation (ECF) with aluminum and titanium electrodes.
Microbubble analysis (size and concentration).
Atomic force microscopy (AFM) for floc visualization.
Protein-doping and oxalate buffer wash for process optimization.
Hydrothermal liquefaction (HTL) for downstream processing.

Main Results:

ECF effectively separated nine diverse microalgal species (1-40 μm).
Titanium electrodes sterilized cultures via bleaching.
Protein-doping enhanced foam stability; oxalate wash preserved cell viability and profiles.
ECF-processed algae (13% biomass loading) yielded high bio-crude via HTL.
ECF is compatible with downstream processing, potentially replacing centrifugation.

Conclusions:

ECF is a highly effective, rapid, and scalable method for microalgae separation and sterilization.
Process modifications enhance ECF's suitability for industrial biotechnology.
ECF integration offers significant advantages over conventional separation techniques.
The technology shows strong potential for optimizing microalgae-based industrial processes.