中山大学学报（自然科学版）（中英文）2025，Vol.64Issue(5)：11-18,8.DOI:10.13471/j.cnki.acta.snus.ZR20240271
微藻的絮凝过程和絮团特性
Microalgal flocculation processes and floc characteristics:Case studies with Chlorella sp.and Nitzschia palea
摘要
Abstract
This study aimed to elucidate the flocculation dynamics and floc characteristics of microalgae under varying volume fractions.Using Chlorella sp.and Nitzschia palea as model species,we conducted controlled experiments in an annular flume to systematically analyze the response of algal aggregation to hydrodynamic conditions.Experimental results demonstrated that the floc size of Chlorella sp.exhibited a concentration-dependent increase,expanding from approximately 8 μm at 0.02%to 22 μm at 0.08%.In contrast,N.palea displayed an inverse trend under identical conditions,with floc size decreasing from approximately 20 μm at 0.02%to 13 μm at 0.08%.Significant alterations in particle size distribution were observed in Chlorella sp.,transitioning from dispersed particles to large aggregated flocs with increasing concentrations,while N.palea maintained limited flocculation propensity.Notably,Chlorella sp.exhibited rapid flocculation at 0.06%,forming flocs exceeding double the size observed at lower concentrations.The research findings indicate that the morphology of microalgae has a significant influence on their flocculation behavior.The spherical structure of Chlorella sp.facilitates flocculation more readily than the rhomboid structure of N.palea,furthermore,characteristics such as algal secretions may also lead to variations in flocculation efficiency.These findings provide critical insights into microalgal flocculation mechanisms and offer valuable references for understanding material transport processes in aquatic systems.关键词
微藻/小球藻(Chlorella sp.)/菱形藻(Nitzschia palea)/絮凝/粒度分布Key words
microalgae/Chlorella sp./Nitzschia palea/flocculation/particle size distribution分类
农业科技引用本文复制引用
邓智瑞,宫鹏杰..微藻的絮凝过程和絮团特性[J].中山大学学报（自然科学版）（中英文）,2025,64(5):11-18,8.基金项目
广东省水利科技创新项目(2023-06,2024-06) （2023-06,2024-06）
