Search
Filters
Close

Save up to 75% off Clearance Books.  No promo code needed.  Shop Now

09059 Efficacy of Isothiazolone Biocide versus Sulfate Reducing Bacteria

Chloromethyl-methylisothiazolone (CMIT/MIT) biocide is used for microbial control in  industrial water treatment applications. It is effective versus various types of bacteria, algae and fungi. This paper will provide results of planktonic and biofilm efficacy studies with CMIT/MIT biocide versus various strains of Desulfovibrio.

Product Number: 51300-09059-SG
ISBN: 09059 2009 CP
Author: Terry M. Williams
Publication Date: 2009
Industry: Water/Wastewater
$0.00
$20.00
$20.00

Chloromethyl-methylisothiazolone (CMIT/MIT) biocide is widely used for microbial control in a variety of industrial water treatment applications. It has been shown to be effective versus various types of bacteria, algae and fungi. Sulfate reducing bacteria (SRB) are of considerable interest for industrial water treatment due to their impact on biofouling and microbially influenced corrosion. This paper will provide results of planktonic and biofilm efficacy studies with CMIT/MIT biocide versus various strains of Desulfovibrio. Results showed that low levels of isothiazolone biocide (1-6 ppm active) provided control of SRB in liquid lab media and on surfaces in recirculating biofilm systems. Isothiazolone biocide is as highly effective versus SRB as it is against other slime forming bacteria, such as Pseudomonas species, as long as the biocide is stable in the system and sulfide levels are low. In sour systems (high sulfide), the biocide is degraded and its antimicrobial efficacy is reduced. The main pathway of degradation of CMIT/MIT by sulfide is presented. The importance of system cleanliness (biofilm accumulation) on biocide efficacy is discussed.

Keywords: isothiazolone, biocide, sulfate reducing bacteria, SRB, biofouling, sulfide

Chloromethyl-methylisothiazolone (CMIT/MIT) biocide is widely used for microbial control in a variety of industrial water treatment applications. It has been shown to be effective versus various types of bacteria, algae and fungi. Sulfate reducing bacteria (SRB) are of considerable interest for industrial water treatment due to their impact on biofouling and microbially influenced corrosion. This paper will provide results of planktonic and biofilm efficacy studies with CMIT/MIT biocide versus various strains of Desulfovibrio. Results showed that low levels of isothiazolone biocide (1-6 ppm active) provided control of SRB in liquid lab media and on surfaces in recirculating biofilm systems. Isothiazolone biocide is as highly effective versus SRB as it is against other slime forming bacteria, such as Pseudomonas species, as long as the biocide is stable in the system and sulfide levels are low. In sour systems (high sulfide), the biocide is degraded and its antimicrobial efficacy is reduced. The main pathway of degradation of CMIT/MIT by sulfide is presented. The importance of system cleanliness (biofilm accumulation) on biocide efficacy is discussed.

Keywords: isothiazolone, biocide, sulfate reducing bacteria, SRB, biofouling, sulfide

Also Purchased
Picture for 10052 Biocide Optimization: Performance Improvements and Reduced Chemical Usage
Available for download

10052 Biocide Optimization: Performance Improvements and Reduced Chemical Usage

Product Number: 51300-10052-SG
ISBN: 10052 2010 CP
Author: George J. Licina
Publication Date: 2010
$20.00
Picture for 07066 Methylisothiazolone: A New Biocide Product for Closed Loop Systems
Available for download

07066 Methylisothiazolone: A New Biocide Product for Closed Loop Systems

Product Number: 51300-07066-SG
ISBN: 07066 2007 CP
Author: Terry M. Williams
Publication Date: 2007
$20.00
Picture for 97215 THE ROLE OF METAL-REDUCING BACTERIA
Available for download

97215 THE ROLE OF METAL-REDUCING BACTERIA IN MICROBIOLOGICALLY INFLUENCED CORROSION

Product Number: 51300-97215-SG
ISBN: 97215 1997 CP
Author: Brenda Little, Patricia Wagner, Kevin Hart, Richard Ray, Dennis Lavoie, Kenneth Nealson, Carmen Agui
$20.00