Formula 45F: Bacterial Supplement for Effective Filamentous Control

Aerobic wastewater treatment systems can experience issues such as bulking sludge, foaming, reduced treatment efficiency, and elevated sludge volume index (SVI) due to the presence of various filamentous organisms in the wastewater.

Formula 45F is a specially formulated blend of microorganisms designed to slow the accumulation of these filamentous organisms in aerobic wastewater treatment systems. It promotes the formation of a dense, well-settling floc with excellent dewatering properties. For plants experiencing severe filamentous bulking, Formula 45F can be used in conjunction with chlorination, hypochlorite, or peroxide treatment programs.


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Formula 45F Features


  • Industrial-strength dry bacteria formulation

  • Conveniently packaged in ready-to-use 1/2-lb water-soluble bags

  • Contains a specially formulated blend of high-performance microorganisms for bioaugmentation in treatment plants

  • Thrives and reproduces in environments without “free” or dissolved oxygen

  • Includes surface tension depressants, micronutrients, growth stimulants, broad-spectrum enzyme systems, and penetrants, alongside microorganisms

  • Environmentally friendly and safe for wastewater treatment systems

  • Available in a 25-lb pail (Product# 143625)

Formula 45F Benefits


  • Helps reduce the growth of various filamentous organisms in aerobic wastewater treatment systems

  • Maximizes the overall performance of your biological wastewater treatment system

  • Promotes the formation of dense, well-settling floc with excellent dewatering properties

  • Provides stable and efficient wastewater treatment

  • Can help lower maintenance costs over time

Using Formula 45F


Dosing Schedule:
Flow Rate Initial Dosage Maintenance
Up to 1,000 GPD ½ lb. per day for 3 days ½ lb. per week
Up to 5,000 GPD ½ lb. per day for 3 days 1 lb. per week
Up to 20,000 GPD 5 lbs.* 1 ½ lb. per week
Up to 50,000 GPD 8 lbs.* 2 lb. per week
Up to 250,000 GPD 15 lbs.* ¼lb. per day
Up to 500,00 GPD 25 lbs.* ½lb. per day
Up to 1 MGD 50 lbs.* 1 lb. per day
Up to 5 MGD 50 lbs. per MGD* 1 lb. per MGD per day
Up to 12 MGD 50 lbs. per MGD* ¾ lb. per MGD per day
Up to 100 MGDD 30 lbs. per MGD* ½ lb. per MGD per day
* Spread this initial dosage out over the course of 10 days.

* * Add as regularly as possible. If it is required to miss one day, add that day’s product with the next dosage.

Dosage rate will vary with flow rates, retention times and system variations.

Do not add to the treatment system at a location where toxic or otherwise adverse pH, dissolved oxygen or temperature conditions may exist at peak levels.

For optimal results the wastewater and treatment system should meet the following conditions:
Optimum Minimum
Influent pH 7.0 5.0
Dissolved oxygen, ppm 2.0+ 1.0+
C/N/P ratio 100/10/1 100/5/1
Temperature 30°C (86°F) 10°C (50°F)
Toxic metals, ppm
(E.g., hex., chromium)		 0 0

Storage and Handling:

Storage: Store in a cool, dry place.

Handling: Wash hands thoroughly with warm, soapy water after handling.

See label and SDS for safety information.

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