Control of Cryptosporidium with wastewater treatment to prevent its proliferation in the water cycle.
Water Sci Technol
; 47(9): 45-9, 2003.
Article
in En
| MEDLINE
| ID: mdl-12830939
ABSTRACT
The outbreak of Cryptosporidiosis in 1996 in Japan is thought to have been enlarged by the proliferation of Cryptosporidium in the water cycle from wastewater to drinking water through the river system. From this experience, the wastewater system must have functions to remove Cryptosporidium oocysts effectively. Efficiencies of wastewater treatment processes to remove oocysts were investigated using pilot plants receiving municipal wastewater. An activated sludge process and a following sand filter showed removal efficiencies of 2 log and 0.5 log, respectively. Poly-aluminium chloride dosage improved the efficiencies by 3 log for the activated sludge process and by 2 log for the sand filter. Chemical precipitation of raw wastewater with poly-aluminium chloride could achieve 1 to 3 log removal according on the coagulant concentration.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Waste Disposal, Fluid
/
Water Purification
/
Cryptosporidium
Type of study:
Etiology_studies
Limits:
Animals
/
Humans
Language:
En
Journal:
Water Sci Technol
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2003
Document type:
Article
Affiliation country:
Japan