An algaecide and fungicide containing boron derivatives which are added to standing water systems such as swimming pools, drinking water resevoirs and cooling towers. The boron derivative algaecide and fungicide is effective in killing and repressing unwanted algal and fungal growth.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 289,498, filed Dec. 23, 1988, now abandoned, which is a continuation of application Ser. No. 870,002, filed June 3, 1986, now abandoned which is a division of application Ser. No. 583,014 filed Feb. 23, 1984 now U.S. Pat. No. 4,594,091.
In accordance with the present invention, a controlled biocide feeder limits growth of bacteria (e.g., Legionella pneumophila) in heat transfer water of building air conditioning systems. Preferably, a flow of heat transfer water is directed across a solid biocidal material, such as 1-Bromo-3-chloro-5, 5-dimethylhydantoin (BCDMH) to form a biocidal solution. A biocide control valve responsive to a heat transfer control signal corresponding to an amount of water used in the heat transfer system for passing biocidal solution to the water used in the heat transfer system to provide a biocidal material concentration of less than 12 parts-per-million to prevent corrosion of the air conditioning system. Preferably, the concentration is between about 1.5 and 3 parts-per-million of BCDMH.
A novel method and compositions are disclosed for the treatment of water in recirculating water systems. The method includes providing a boron level of at least 20 ppm in the water, continually eroding into the water a compressed sanitizer/algicide component including a halogen source material, a boron source material, and glycoluril, and periodically adding to the water an oxidizing clarifier comprising a chlorine source material, a non-halogen, chlorine source material, and a boron source material. The invention also provides novel water treatment chemicals including the compressed sanitizer/algicide component and the clarifier useful in the foregoing system. The system and compositions are safe and reliable, control algal and fungal growth and generally provide improved water quality for recirculating water systems.
Dry, stable, high available halogen sanitizing granular compositions with a rapid rate of dissolution comprising halogenated 1,3,5-triazine-2,4,6-triones and a dissolution accelerant that is an alkali metal salt of 1,3,5-triazine-2,4,6-trione are disclosed. The disclosed compositions may include inorganic and/or organic disintegration agents. Additionally, these compositions may contain other performance enhancing additives such as water clarifiers, algaestats/algaecides, surfactants, glidants, processing aids, and binders. These UV stable sanitizing compositions contain a high available halogen content, and are stable even when stored in high-humidity environments.
Disclosed are trichloroisocyanuric acid compositions that have improved algicidal and/or fungicidal properties yet are relatively safe and non-corrosive. The compositions preferably contain between about 50% and about 95% TCCA, between about 0.5% and about 7% glycoluril, between about 2% and about 40% alum, and between about 2% and about 40% borax. The compositions generate substantially less chlorine gas than would be expected from the teachings of the prior art, especially when wet. The inventive compositions are therefore less toxic and less corrosive.
The present invention comprises devices and methods for treating a standing water system comprising devices for the administration to the standing water system an admixture comprising calcium hypochlorite and borate salts and acids through a perforated distribution device. The method of treating a standing water system more efficiently provides free chlorine to the system, stabilizes the pH of the standing water system, and reduces the undesired side effects of the addition of calcium hypochlorite alone.
