Type 0041 / Type 0675

Identification

• Gram variable
• Have square-shaped cells with occasional irregularity
• Have attached growths

Why Do I Have It?

• Indicates low F:M conditions

Treatment

If Type 0041/0675 is causing issues within a wastewater plant, we recommend increasing wasting and increasing your F:M ratio. Calculate your F:M ratio using the Aquafix F:M ratio calculator. If you have limitations where you cannot increase wasting then the addition of a food supplement or carbon source is recommended. SmartBOD is a blend of bioavailable amino acids, complex proteins, carbohydrates, and micronutrients that helps treat chronic issues related to low F:M conditions.

Under the Microscope and in Your Plant

Type 0041/0675 are Gram variable filamentous bacteria. Type 0041 and Type 0675 are frequently grouped together as they look similar and thrive in identical conditions. Type 0041 has a wider diameter (1.8-2 µm) than Type 0675 (1 µm). These filaments can be identified under 1000x magnification. Type 0041/0675 usually have attached growth and square-shaped cells with occasional irregularity. Rapidly growing Type 0041/0675 typically will have very limited attached growths and will not have attached growth at the end of the filaments. This filament can occasionally cause bulking to occur, however, they are primarily an indication of low F:M conditions.

In many cases, Type 0041/0675 are beneficial in forming sturdy floc and it’s unusual for it to reach high enough abundance to cause issues in the wastewater system. Usually, in more severe low F:M conditions, an increased abundance of Type 1851 is observed rather than an increase in Type 0041/0675.