How much can the temperature within a digester be changed per day?

The correct answer regarding the temperature change within a digester per day is that it should not exceed 1°F. This is essential because digesters are biological systems that rely on specific temperature ranges for optimal microbial activity. Each type of microbial population present in the digester, such as mesophilic or thermophilic organisms, has a specific temperature range in which they thrive.

Significantly altering the temperature can disrupt the balance of microbial populations and their metabolic processes, potentially leading to decreased digestion efficiency, increased production of harmful byproducts, or even process failure. Keeping temperature changes within a narrow range helps maintain stable conditions that support the health and activity of the microorganisms responsible for breaking down organic material in the digester. This control is crucial for effective digestion and for ensuring that the wastewater treatment process remains efficient and effective.