Formula 21HG: Advanced Grease Control Bacteria for WWTPs

Fats, oils, and grease (FOG) can create significant issues in wastewater treatment plants and food processing facilities, leading to clogs, blockages, unpleasant odors, equipment damage, reduced treatment efficiency, and even the potential collapse of filter-bed media.

Formula 21HG is designed to reduce the accumulation of FOG and other organic deposits in wastewater treatment plants and food processing facilities. It promotes the growth of a specialized biomass capable of breaking down and digesting tough wastes such as meat, cooking oil, margarine, butter, shortening, and dairy products.

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Formula 21HG Features


  • Industrial-strength dry bacteria formulation

  • Specially formulated with high-performance microorganisms for bioaugmentation in treatment plants and collection systems

  • Biodegradable and environmentally safe

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

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

  • Thrives in environments without “free” or dissolved oxygen

  • Eco-friendly and sustainable solution

  • Available in a 25-lb pail (Product# 146425)

Formula 21HG Benefits


  • Increases overall system efficiency

  • Helps establish a biomass capable of breaking down and consuming FOG and other organic substances

  • Prevents blocking, ponding, and the potential collapse of filter-bed media

  • Enhances BOD, COD, and TSS removal

  • Improves sludge settlement

  • Reduces hydrogen sulfide levels

  • Minimizes foul odors

  • Can reduce equipment repairs associated with FOG accumulation

Using Formula 21HG


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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