Application Rates

 

Rates vary by product formulation and system. See accompanying tabulations (BetzDearborn, Inc., 1988, 1993a, 1993b). Badly fouled systems must be cleaned before treatment is begun.

 

Clam-Trol CT-1 is applied as follows:

  1. Warmer water temperatures and longer contact times reduce the concentration of CT-1 needed for effective kills.

  2. Product weight is 1 kg L-1 (8.5 lb/gal), and concentrations are based on product.

  3. Apply as follows for recirculating cooling water systems:
    1. Intermittent or slug method: Initially when fouled, 360 g to 2.4 kg per 10,000 L water (0.3 to 2.0 lb per 1,000 gal of water), 36 to 240 ppm. Repeat until control is achieved. Subsequently, apply 180 g to 1.8 kg per 10,000 L water (0.15 to 1.5 lb per 1,000 gal of water), 18 to 180 ppm, every 3 days, or as needed to maintain control.
    2. Continuous feed method: Initially when fouled, 360 g to 2.4 kg per 10,000 L water (0.3 to 2.0 lb per 1,000 gal of water), 36 to 240 ppm. Subsequently, maintain 60 to 600 g per 10,000 L water (0.05 to 0.5 lb per 1,000 gal water), 6 to 60 ppm, in system.

  4. Apply as follows for once-through industrial cooling water systems:
    1. Intermittent or slug method: Initially when fouled, 240 g to 1.2 kg per 10,000 L water (0.2 to 1.0 lb per 1,000 gal of water), 24 to 120 ppm, at minimum treatment intervals of 15 min. Repeat until control is achieved. Subsequently, 60 to 600 g per 10,000 L water (0.05 to 0.5 lb per 1,000 gal of water), 6 to 60 ppm, as needed to maintain control.

       

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    2. Continuous feed method: Initially when fouled, 240 to 1.2 kg per 10,000 L water (0.2 to 1.0 lb per 1,000 gal of water), 24 to 120 ppm. Continue until control is achieved. Subsequently, 24 to 240 g per 10,000 L water (0.02 to 0.2 lb per 1,000 gal of water), 2.4 to 24 ppm.

  5. Apply as follows for auxiliary water and wastewater systems:
    1. Intermittent or slug method: 1.8 to 4.8 kg in 10,000 L water (1.5 to 4.0 lb per 1,000 gal of water), 180 to 480 ppm, in system water or in water being added to system, for 4 to 8 hr, 1 to 4 times per week or as needed to achieve control. Subsequently, 900 g to 2.4 kg in 10,000 L water (0.75 to 2.0 lb per 1,000 gal of water), 90 to 240 ppm.
    2. Can be sprayed onto a waste pile.
CT-2 is applied as follows:

  1. Rates are given as weight of product, at 960 g L-1 (8.0 lb per gal). Concentrations are based on product.

  2. Apply as follows for recirculating or once-through cooling water systems: add 20 to 200 g per 10,000 L water (0.016 to 0.166 lb per 1,000 gal of water), 2 to 20 ppm, based on water in the system or on flow rate through the system. Maintain this concentration for 3 to 48 hr.
    1. Intermittent or slug method: 360 - 1.56 kg/10,000 L (0.3 to 1.3 lb per 1,000 gal) of water in system or being added to system, 36 to 156 ppm, for 4 to 8 hr, 1 to 4 times per week or as needed to achieve control. Subsequently, use 180 to 780 g per 10,000 L (0.15 to 0.65 lb per 1,000 gal) of water, 18 to 78 ppm.
    2. Can be sprayed onto a waste pile.

 

CT-4 is applied as follows:

  1. Rates are given as volume of product. Concentrations are based on active ingredient (ai) of quaternary compound (10 percent of product).

  2. Apply as follows for once-through freshwater cooling water systems: 100 ml to 1 L per 10,000 L (1.28 to 12.8 fluid ounces per 1,000 gal) of water, 1 to 10 ppm at no more than 4 times per year and for no more than 120 hr per application.

 

Zebra Mussel Chemical Control Guide

CLAM TROL