ARTICLES BY DANIEL THEOBALD

• Math Solutions Explained: Calculate Food-to-Microorganism (F-M) Ratio

  3/15/2022

  The food-to-microorganism (F-M) ratio is a process control numeric value advantageous to determine the proper number of microorganisms for the biological treatment process. The solution of calculating F-M ratio uses the influent volume of wastewater into an activated sludge system (flow MGD), incoming carbonaceous biochemical oxygen demand (CBOD) (mg/L) concentration into the aeration tank, mixed liquor volatile suspended solids (MLVSS) concentration (mg/L), and quantity (in gallons) of the respective aeration system.

• Math Solutions Explained: Biochemical Oxygen Demand (BOD) mg/L

  8/23/2021

  Water Online’s “Math Solutions Explained” series, presented by wastewater consultant and trainer Dan Theobald (“Wastewater Dan”), educates operators by explaining BOD mg/L calculations.