What temperature is considered to inhibit biological activity at a Publicly Owned Treatment Works?

Biological activity in wastewater treatment, particularly in Publicly Owned Treatment Works (POTWs), is highly sensitive to temperature. Microorganisms, which play a crucial role in breaking down organic matter, tend to thrive within a specific temperature range. Temperatures around 104°F or greater can inhibit their activity significantly.

At higher temperatures, particularly beyond this threshold, the microbial community can suffer from stress or even die off, leading to decreased efficiency in treatment processes. Understanding this temperature threshold is vital for maintaining proper operation of a treatment facility, as it ensures that the biological processes essential for wastewater treatment can function effectively.

In contrast, temperatures lower than 104°F generally support biological activity, whereas those significantly higher can create environments that are not conducive to microbial health or operation efficiency within the treatment works. This temperature range is critical for ensuring that the treatment of wastewater remains effective and within regulatory compliance.