Formula D-500A & Formula D-500C
Biodegradation Bacteria for Wastewater Treatment

Optimize Biodegradation and Improve Wastewater Plant Efficiency

Why use Formula D-500A & Formula D-500C?

Challenges such as high or variable influent loads and nutrient imbalances can negatively impact treatment efficiency in wastewater systems.

Formula D-500A and D-500C are advanced microbial supplements designed to boost the biological performance of wastewater treatment systems. Engineered with powerful bacteria, growth stimulants, enzymes, and penetrants, they accelerate the breakdown of organic waste—including surfactants, solvents, FOG (fats, oils, and grease), and petroleum hydrocarbons. These targeted formulas improve treatment efficiency, even in high-strength or variable influent conditions, ensuring more reliable sludge reduction, odor control, and effluent quality.

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Explore further details about this microbial supplement

Features

Industrial-strength dry bacteria formulation
Formula D-500A – for WWTPs with GPD over 1 million
Formula D-500C – for WWTPs with GPD under 1 million
Biodegradable and environmentally friendly
Contains microorganisms, growth stimulants, enzymes, surface tension depressants, and penetrants
Packaged in convenient, ready-to-use ½-lb water-soluble bags
Effective in environments without dissolved oxygen
Available in 25-lb pails (D-500A Product# 143725 and D-500C Product# 143830)

Benefits

Degrades surfactants, solvents, polymer residues, starch, cellulose, fats, oils, greases, and hydrocarbons
Improves sludge settling and dewatering
Reduces hydrogen sulfide production
Enhances BOD, COD, and TSS removal
Controls surface foam and filamentous growth
Minimizes odors and reduces overall sludge volume

Usage Instructions

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.*	1½ lb. per week
Up to 50,000 GPD	8 lbs.*	2 lb. per week
Up to 250,000 GPD	15 lbs.*	¼ lb. per day
Up to 500,000 GPD	25 lbs.*	½ lb. 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 MGD	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 a day is missed, add that day’s product with the next dosage.

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

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)	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.

Formula D-500A & Formula D-500CBiodegradation Bacteria for Wastewater Treatment