Accession Number:

ADA109053

Title:

Development of Precoat Filtration Technology for Reverse Osmosis Units

Descriptive Note:

Final rept.

Corporate Author:

JOHNS-MANVILLE SALES CORP DENVER CO RESEARCH AND DEVELOPMENT CENTER

Personal Author(s):

Report Date:

1981-11-20

Pagination or Media Count:

98.0

Abstract:

THIS PROJECT WAS UNDERTAKEN TO DETERMINE WHETHER DIATOMACEOUS EARTH FILTER AID DE filtration would be an effective alternative for the presently specified multimedia filter on the 600 GPH ROWPU. The project included both filtration studies and small scale reverse osmosis membrane fouling tests for several types of water sources. Data from six different water sources, two bench studies and four field studies, demonstrated that DE can easily meet, and if necessary exceed, the criteria set by the Army for multi-media filtered water for RO feed. For most tests a filter aid prepared by coating CELITE 503 with aluminum hydrate had the best balance between filtered water quality and cycle length. Such a filter aid could be purchased ready mixed greatly simplifying operation. Three RO life tests were attempted. One was aborted after the membrane was damaged by chlorine from an extraneous source. The other two were successfully completed without evidence of particulate fouling of the membranes. Author

Subject Categories:

  • Water Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE