摘要
采用不同生长时期的藻细胞、藻源型有机物(AOM)及原藻液进行过滤实验,研究不同生长时期的藻源污染物对膜污染的影响特性及机制。利用UMFI法分析不同生长时期的藻细胞、AOM及原藻液的污染程度;采用CRITIC分析法定量分析了不同生长时期的AOM和藻细胞在混合过滤过程中对膜污染的贡献率,同时采用混合污染堵塞模型分析了不同生长时期的原藻液不同过滤阶段的主要污染堵塞类型。结果表明,3个生长时期的藻细胞及AOM的膜污染程度均为对数期最轻;值得注意的是,在原藻液过滤过程中藻细胞及AOM的膜污染贡献率随着生长时期的不同而有所变化,其中AOM的污染权重随着生长时期的延长不断减小,而藻细胞的污染权重随着生长时期的延长不断增大。不同生长时期的原藻液过滤过程中均呈现两段式污染堵塞类型,并且后段均为滤饼堵塞。研究不仅阐明了藻源型污染物特性对微滤处理高藻水膜污染的影响机制,同时也为改善膜污染的技术开发提供参考。
The characteristics of algal source foulants could affect the membrane fouling during the treatment of algaerich water by microfiltration.Filtration experiments were carried out with algal cells,algogenic organic matter(AOM)and algae suspension at different growth phases to study the influence of algal source foulants characteristics on membrane fouling and its mechanisms.The UMFI method was used to analyze the fouling degree of algae cells,AOM and algae suspension at different growth stages.In particular,the changes in their fouling contribution ratios at different growth phases were further elucidated based on the criteria importance through intercriteria correlation.Meanwhile,the mixed fouling blocking model was used to analyze the main fouling blocking types at different filtration stages of algae suspension at different growth stages.The results showed that the membrane fouling caused by algae cells and AOM in the exponential phase was the lowest compared with the other two growth phases.Notably,the contribution of AOM and algae cells to membrane fouling varied with the growth phase during the treatment of algae-rich water by microfiltration.The objective weight of fouling caused by AOM decreased with the prolongation of growth phase,and the declining phase reduced to 10.2%.Meanwhile,the objective weight of algae cells increased with the prolongation of growth phase,and the exponential phase was only 28.3%.In the filtration process of algae suspension at different growth phase,there were all two stages of fouling mechanisms,and the latter stage was cake formation.These results not only elucidated how the changes in the characteristics of the algae suspension affected characteristics on the membrane fouling and disclosed its mechanism during the microfiltration treatment of algae-rich laden water by microfiltration,but also provided theoretical research guidance for the development of membrane anti-fouling improvement technologies.
作者
张事
孙凌凯
马方凯
徐望朋
高兆波
张忠义
李迎喜
吴振斌
张学治
ZHANG Shi;SUN Ling-Kai;MA Fang-Kai;XU Wang-Peng;GAO Zhao-Bo;ZHANG Zhong-Yi;LI Ying-Xi;WU Zhen-Bin;ZHANG Xue-Zhi(Changjiang Institute of Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China;Key Laboratory of Changjiang Regulation and Protection of Ministry of Water Resources,Wuhan 430010,China;Hubei Key Laboratory of Basin Water Security,Wuhan 430010,China;Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China)
出处
《水生生物学报》
CAS
CSCD
北大核心
2023年第7期1096-1105,共10页
Acta Hydrobiologica Sinica
基金
国家重点研发计划中美国际合作项目(2018YFE0110600)
湖北省博士后创新实践岗位项目(2022CXGW001)
自主科研项目(CX2021Z31)资助。
关键词
生长时期
藻源污染物
膜污染
CRITIC
混合污染堵塞模型
Growth phase
Algal source foulants
Membrane fouling
CRiteria Importance Through Intercriteria Correlation
Mixed fouling blocking models
作者简介
张事(1991—),男,博士研究生,研究方向为含藻水膜处理技术及河湖水生态修复技术。E-mail:zhangshi@cjwsjy.com.cn;通信作者:张学治,E-mail:zhangxuezhi@ihb.ac.cn。
