Oxidation ditches are most often used to treat municipal wastewater, but I do come across this activated sludge configuration in the...

Estimating Oxygen Demand in a Bioreactor Using Monte Carlo Simulations from ModelRisk Introduction In this post I am going to focus on a...

In this post I focus on aspects of laboratory testing and plant operation that relate to nitrification, a topic I am endlessly fascinated...

Bacteria are amazingly complex, even though each is comprised of only a single cell. Bacteria make up about 95 percent of all the...

Increase DO in a Bioreactor with Hydrogen Peroxide Hydrogen peroxide can be used to increase the dissolved oxygen (DO) concentration in...

In this post I'm going to discuss how you can estimate the solids concentration in the return activated sludge (RAS) using the treatment...

Detailed Review of Bioaugmentation Bioaugmentation is the addition of a specially prepared bacterial culture to a bioreactor (aeration...

Four graphics of the nitrogen cycle are shown in this short, simple post. The first graphic below is one of the most common and you will...

Introduction Before going into a detailed discussion of the F:M (food-to-mass or food-to-microorganism) ratio I want to let you know...

Wastewater Temperature in the Bioreactor Operators know that when the temperature of the wastewater entering the bioreactor is too high,...