AWWA ACE99555

This paper discusses the innovative drinking water treatment process, CRISTAL(R), that combines powdered activated carbon (PAC) and ultrafiltration (UF). The process is flexible and adaptable to flow rate. The final produced water quality is constant and exceeds current water quality standards regardless of the resource variations. All the results concerning the content of organic matters in water are confirmed. Total organic carbon (TOC) levels after the implementation of CRISTAL are approximately 0.8 mg/l, the biodegradable organic carbon (BDOC) are lower than the detection limit of 0.2 mg/l. The chlorine coverage has been increased up to the last sampling point at a value higher than 0.1 mg/l. Due to the suppression of the prechlorination step in the water treatment process and the reduction of organic matters content, the concentration of disinfection byproducts has been dramatically reduced. Total trihalomethane levels are now below 10 ug/l. The bacterial quality has also been improved as seen by the reduction of HPC and of Aeromonas Aeruginosa. This improvement appears to be the result of the combined action of a better chlorine coverage of the network, and of the reduction of organic matters content.

Product Details

Published:

01/01/1999

ISBN(s):

1583210016

Number of Pages:

15

File Size:

1 file , 300 KB