Application Rates

 

MACROTROL 9210. Note: Excess residual MACROTROL 9210 must be detoxified prior to discharge to a receiving stream by using the proprietary compound NALCO 1315 or by using bentonite clay at a minimum ratio of 5 ppm clay to 1 ppm product (Nalco 1995a).

 

  1. In recirculating, auxiliary cooling water, and wastewater systems:

    1. Initial dose: Add 0.08 to 0.8 lb per 1,000 gal water (10 to 100 ppm: 100 to 1,000 kg per 10,000 L). Repeat as necessary to achieve control.

    2. Subsequent dose: When control is evident, add 0.08 to 0.4 lb per 1,000 gal (10 to 50 ppm: 100 to 500 kg per 10,000 L), as needed to maintain control.

  2. In once-through cooling water systems:

    1. Intermittent feed:

      • Initial dose: When the system is noticeably fouled, add 0.08 to 0.8 lb per 1,000 gal water (10 to 100 ppm: 100 to 1000 kg per 10,000 L), based on system flow rates. The minimum treatment period should be 6 to 24 hr. Repeat as necessary to achieve control.

      • Subsequent dose: When control is evident, add 0.04 to 0.4 lb per 1,000 gal (5 to 50 ppm: 50 to 500 kg per 10,000 L), based on system flow rates on an as-needed basis to maintain control. Frequency of feed should be tied to a monitoring program.

    2. Continuous feed:

      • Initial dose: When the system is noticeably fouled, add 0.04 to 0.4 lb per 1,000 gal water (5 to 50 ppm: 50 to 500 kg per 10,000 L), based on system flow rates. Continue to feed until needed control is achieved.

      • Subsequent dose: Maintenance control can be effective through continuous feed at 0.016 to 0.16 lb per 1,000 gal (2 to 20 ppm: 20 to 200 kg per 10,000 L), based on system flow rates.

 

NALCO 9380. Note: NALCO 9380 must be deactivated prior to discharge from the system by using bentonite clay at a minimum ratio of 5 ppm clay to 1 ppm product or by using the proprietary compound NALCO 1315 (Nalco 1995b).

  1. In recirculating, auxiliary cooling water, and wastewater systems:

    1. Initial dose: Add 0.2 to 1.7 fluid ounces per 1,000 gal water (1 to 12 ppm: 10 to 120 ml per 10,000 L). Repeat as necessary to achieve control.

    2. Subsequent dose: When control is evident, add 0.2 to 0.9 fluid ounces per 1,000 gal (1 to 6 ppm: 10 to 60 ml per 10,000 L), as needed to maintain control.

  2. In once-through cooling water systems:

    1. Initial dose: When the system is noticeably fouled, add 0.2 to 1.7 fluid ounces per 1,000 gal water (1 to 12 ppm: 10 to 120 ml per 10,000 L) based on system flow rates. The minimum treatment period should be 6 to 24 hours. Repeat as necessary to achieve control.

    2. Subsequent dose: When control is evident, add 0.1 to 0.9 fluid ounce per 1,000 gal (0.6 to 6 ppm: 6 to 60 ml per 10,000 L), based on system flow rates on an as-needed basis to maintain control. Frequency of feed should be tied to a monitoring program.

  3. Continuous feed:

    1. Initial dose: When the system is noticeably fouled, add 0.1 to 0.9 fluid ounce per 1,000 gal (0.6 to 6 ppm: 6 to 60 ml per 10,000 L), based on system flow rates. Continue to feed until needed control is achieved.

    2. Subsequent dose: Maintenance control can be effective through continuous feed at 0.03 to 0.3 fluid ounces per 1,000 gal (0.2 to 2.5 ppm: 2 to 25 ml per 10,000 L), based on system flow rates.

 

Zebra Mussel Chemical Control Guide

MACROTROL 9210