Related Experiment Video
Updated: Mar 17, 2026
08:17
Coupling Carbon Capture from a Power Plant with Semi-automated Open Raceway Ponds for Microalgae Cultivation
Published on: August 14, 2020
6.1K
Harvesting Microalgae with Different Sources of Starch-Based Cationic Flocculants
Chengrong Peng1, Shuangshuang Li1,2, Jiaoli Zheng1,2
1Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
Applied Biochemistry and Biotechnology
|July 27, 2016
Summary
Cationic starches (CS) from wheat, potato, and corn effectively flocculate microalgae like Chlorella pyrenoidosa and Botryococcus braunii. Low dosages achieve harmless harvesting, reducing costs by selecting economical starches and optimizing procedures.
Area of Science:
- Biotechnology
- Materials Science
- Environmental Science
Background:
- Microalgae cultivation is crucial for biofuels and bioproducts.
- Efficient and cost-effective harvesting methods are needed for microalgal biomass.
- Cationic starches (CS) show potential as eco-friendly flocculants.
Purpose of the Study:
- To synthesize and evaluate cationic starches (CS) from wheat, potato, and corn for microalgae harvesting.
- To determine the flocculation efficiency of CS on Chlorella pyrenoidosa and Botryococcus braunii.
- To optimize CS dosage and procedures for cost-effective microalgae harvesting.
Main Methods:
- Synthesis of cationic starches from wheat, potato, and corn.
- Testing flocculation efficiency with Chlorella pyrenoidosa and Botryococcus braunii cultures.
- Varying CS dosages and stirring times to assess harvesting efficiency.
Main Results:
- Three CS synthesized showed varying degrees of substitution but similar flocculation performance.
- Harmless flocculation efficiency was achieved at low CS dosages (89-119 mg g⁻¹).
- Optimized stirring and low dosages (58-78 mg g⁻¹) significantly improved harvesting efficiency for C. pyrenoidosa.
Conclusions:
- Cationic starches are effective and harmless flocculants for microalgae harvesting.
- Cost-effective microalgae harvesting is achievable by using economical starch sources and optimized flocculation procedures.
- This study demonstrates a sustainable approach to microalgae biomass recovery.
