Removal of Cryptosporidium parvum oocysts by rapid sand filtration with ballasted flocculation-filtration and intermediate downwashes

被引：9
|
作者：
Gitis, V
Freger, V
Haugth, RC
Clark, RM
机构：
[1] Ben Gurion Univ Negev, Dept Biotechnol & Environm Engn, IL-84105 Beer Sheva, Israel
[2] US EPA, Natl Risk Management Res Lab, Water Qual Management Branch, Water Supply & Water Resources Div, Cincinnati, OH 45268 USA
来源：
ACTA HYDROCHIMICA ET HYDROBIOLOGICA | 2005年 / 33卷 / 04期
关键词：
ripening; particle addition; hydrodynamic forces; Kaolin; deep-bed filtration;
D O I：
10.1002/aheh.200200584
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A novel and efficient protocol optimising deep-bed filtration of surface water was developed. The innovation lies in ballasted-flocculation filtration and an intermediate downwash. The approach is based on the assumption that kaolin particles with a partial positive charge may adsorb onto the surface of C. parvum oocysts and neutralize their negative charge. Application of this technology enhanced removal of inorganic particles and Cryptosporidium, parvum oocysts by approximately 30% and shortened the ripening stage of the filtration process from 1 h to about 10 min.
引用
收藏
页码：355 / 364
页数：10
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