Accepta 2827 Isothiazoline Biocide
Description and Use
ACCEPTA 2827 is a broad spectrum, non-foaming, readily biodegradable micro-biocide for use in industrial cooling water systems. It is based on a formulation of Isothiazoline derivatives and is completely soluble in water. At relatively low concentrations it is effective against a range of microorganisms including many gram positive and gram negative bacteria, fungi and algae.
ACCEPTA 2827 is effective over a wide range of pH and can be used in isolation or alternately with other non-oxidising or oxidising biocides.
- Highly effective non-oxidising biocide
- Versatile multi-use product
Dosage Rates & Applications
ACCEPTA 2827 should be dosed periodically at a rate of 100 – 200ppm of the total system volume.
In a badly fouled system, an initial shock dose of up to 500ppm may be required.
ACCEPTA 2827 is effective over a wide range of pH and can be used in isolation or alternately with other non-oxidising or oxidizing biocides.
For chilled water and LTHW systems:
In order to control potentially problematic microbial contamination it is recommended for chilled water and LTHW applications that the system is dosed initially with Accepta 2827 at the rate of 200 – 500ml / 1000 litres of system volume and that is repeated once every 3 months.
The microbial activity (TVC) in the system can be monitored using microbial dipslides. Good control is indicated by a general bacteria level (TVC) of no more than 103 cfu/ml. If pseudomonas or other specific testing is required then contact our laboratory and we will be pleased to help you.
For open evaporative cooling systems:
In order to prevent the development of resistant microbial strains Accepta 2827 should normally be used in conjunction with another biocide such as Accepta 2301 and the two biocides should be dosed alternately.
A typical dosing regime would be to dose the system with 200ml of Accepta 2827 / 1000 litres of system volume as a shot dose and then dose the system with a shot dose of the second biocide at the next scheduled dosage before reverting to Accepta 2827 for the third dosage etc.
The required frequency of biocide dosage will depend on the retention time of the cooling system and tendency of the system to become contaminated with nutrients that will encourage microbial growth.
A typical biocide dosing frequency for systems with a long retention time would be once / week but for systems which change their water more frequently and have a short retention time then the frequency of dosages will need to be increased (typically twice per week).
The general microbial activity (TVC) in the system can be monitored using microbial dipslides. Good control is indicated by a general bacteria level (TVC) of less than 104 cfu/ml. It is recommended that a dipslide test is taken weekly and the system is tested specifically for legionella bacteria at least once per quarter (contact our laboratory)
|Specific gravity:||1.00 – 1.02|
|pH:||3.0 – 5.0|
|Boiling point:||100 oC|
Use biocides safely. Always read the label and product information before use. See safety data sheet for safety and handling precautions