Anti-microbial agent to control biomass accumulation in SO2 scrubbers
AssigneeEcolab USA Inc.
InventorsJunzhong Li, Chris Nagel, Laura Rice
Life of this patent
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Abstract
A method for removing or preventing a microbial growth, biofilm, biomass and/or mineral deposit on a hard surface inside an SO2 scrubber is disclosed. In particular, biocide compositions may be dosed in pulse or continuously for the reduction and prevention of biofilms on the hard surfaces inside an SO2 scrubber. A biocide composition disclosed here uses one or more non-oxidizing biocides, especially a mixture of one or more quaternary ammonium compounds and one or more other biocides.
Claims20
A method for removing and/or preventing microbial growth and biofilm on a hard surface inside an SO2 scrubber system comprising:
- dosing a biocide composition comprising from about 0.1 ppm to 150 ppm of one or more biocides into a sump or recirculation sump within an SO2 scrubber system and/or into the water line of the SO2 scrubber system;
- contacting a hard surface comprising packing materials inside an SO2 scrubber system with the biocide composition;
- wherein the one or more biocides in the biocide composition comprises 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione, sodium dimethyldithiocarbamate, disodium ethylene bis-dithiocarbamate, bis-(trichloromethyl)-sulfone, glutaraldehyde, or combinations thereof;
- wherein the method does not require stopping of the normal operation of the SO2 scrubber system;
- wherein the microbial growth and biofilm compromise both aerobic microorganisms and anerobic microorganisms;
- and
- wherein the surface is contacted with the biocide composition at a temperature between about 2° C. to about 60° C.
A method for removing and/or preventing microbial growth and biofilm on a hard surface inside an SO2 scrubber system comprising:
- contacting a hard surface inside an SO2 scrubber system with a biocide composition comprising from about 0.1 ppm to 150 ppm one or more biocides,
- wherein the one or more biocides in the biocide composition comprises-one or more quaternary ammonium compounds and at least one of 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione, sodium dimethyldithiocarbamate, disodium ethylene bis-dithiocarbamate, bis-(trichloromethyl)-sulfone, glutaraldehyde, or combinations thereof,
- wherein the microbial growth and biofilm compromise both aerobic microorganisms and anerobic microorganisms;
- and
- wherein the biocide composition removes or prevents microbial growth and biofilm on the surface.
Dependencies are inferred from the claim text.