Microbiological control |
|
|
|
Microbiocide - Biodispersant Use BDS 6500 microbiocide is a broad spectrum antimicrobial product designed specifically to control slime forming bacteria, sulphate reducing bacteria and algae in industrial recirculating cooling water systems.BDS 6500 can be used over a wide pH and temperature range and releases no odour or foam at the indicated levels. As for the active ingredient, BDS 6500 is a concentrated solution of Glutaraldehyde Technology
When Glutaraldehyde is dissolved in water, the active molecular forms which contain carboxyl groups react with amino groups in proteins and polyhydroxy compounds common in most microorganisms rendering control in water systems. Chemically, the cell walls of bacteria contain a unique protein which, specifically, is a combination often different amino acids. The amino groups are typical organic bases and effective nucleophilic compounds. Glutaraldehyde reacts with the proteins of the bacterial cell wall and the proteins within the internal portions of the cell via a nucleophilic substitution reaction. The reaction will be internal or external depending upon the pH of the water.
 Under
alkaline water conditions
Under alkaline water conditions, glutaraldehyde reacts with the free (unprotonated) amino groups on the outside of the cell wall. In doing so, glutaraldehyde cross-links and binds the amino groups on the cell wall preventing the cell from functioning by inhibiting nutrients from entering the cell and waste products from leaving the cell. Under slightly acidic conditions Under acidic conditions, the amino groups on the outside of the cell wall are positively charged (or protonated). In this case, glutaraldehyde penetrates the cell, and once inside, functions in the same manner as it does at high alkalinity, cross-linking the free amino groups of the proteins
In this manner, glutaraldehyde functions as an enzyme poison, extremely reactive and broad spectrum in scope. Activity
BDS
6500 shows particular strength in
controlling sulfate reducing bacteria. Published literature specifically points
out the combination of glutaraldehyde and isothiazolone as being very effective
in the control of this troublesome bacteria.
BDS 6500 is also unaffected by oil contamination, making it a popular toxicant in refinery and oil production applications. In reviewing the mode of microbiocidal action of BDS 6500, it is evident that it shows efficacy over a wide pH range. The ability of this material to work more rapidly at high pH makes it a popular choice in alkaline cooling water systems. . Feeding The quantity of BDS 6500 required for any give application will depend on such factors as the type and volume of the system, the extent of microbiological contamination and the degree of control required. BDS 6500 may be directly fed from the drum or diluted with water and fed by any suitable chemical feed system. BDS 6500 should be dosed directly into the sump or basin or any location where good distribution can be assured.
Wear suitable protective gloves and safety goggles. In case of contact immediately flush with water. After eye contact seek medical advice. Small spills can be flushed with water. Large spills should be collected for disposal. Before use review the Material Safety Data Sheet for additional information.
|
|
home page
Since
all microbial enzymes utilized for energy production are proteins or
combinations of proteins, their structure becomes altered through cross-linking,
thus rendering them nonspecific and unreactive.
