Title:
BIOSENSOR AND DEPOSIT SENSOR FOR MONITORING BIOFILM AND OTHER DEPOSITS
Document Type and Number:
WIPO Patent Application WO2001096834
Kind Code:
B1
Abstract:
A method and apparatus for determining the deposition of organic and inorganic contaminants, such as biofilm, on a coupon is disclosed. The method and apparatus include a coupon suspended from a weight sensor within a reservoir tank. The reservoir tank includes fluid inlet means for receiving a fluid sample which flows over the surface of the coupon for a determined period of time to allow contaminants presents in the fluid sample to deposit on the coupon surface. At regular intervals, the reservoir tank is drained and the coupon is allowed to dry and is weighed. The weight of the contaminants which have deposited on the surface of the coupon is determined by comparing the weight of the coupon to its previous weight. In this manner, a computer system attached to the weight sensor can analyze a series of weights and present the results in a time-deposit graph. The present invention can be fully automated to allow for effective and optimal biocidal whitewater treatments to occur in pulp and papermaking processes, and is well suited for use in screening biocidal agents effective in preventing the deposition of contaminants on equipment surfaces.
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Inventors:
BOETTCHER HELMUT
Application Number:
PCT/US2001/019082
Publication Date:
July 18, 2002
Filing Date:
June 14, 2001
Export Citation:
Assignee:
HERCULES INC (US)
International Classes:
G01N5/02; G01N1/02; G01N15/04; G01N17/00; G01N33/18; D21H21/02; G01N15/00; (IPC1-7): G01N5/02; G01N17/00; G01N33/18
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