If a wastewater treatment plant (WWTP) is NOT functioning properly, why might the oxygen levels in downstream water bodies decrease?

In patient safety incident reporting, an incident that did not reach the patient is a

Determine the total VSS concentration as g VSS/m3.

This illustration was provided during the lecture to help you understand type of solid (A, B, or C in red color) generated during secondary treatment process. Questions from 4 to 10 describes type of solid (in a descriptive way or equation). Choose right solid type (A, B, or C in red color) for the given solid in the following questions. 

Determine BODultimate (mg/L) if: k1 = [a] d-1 BOD5 = [b] mg/L You can use the example figure below if that helps. 

Determine the substrate utilization rate as g bsCOD/(d m3).

Choose all equations for balanced equation for cell synthesis?

You have a secondary treatment system that consists of aerobic treatment tank and secondary settling tank. Aerobic treatment tank is assumed to be an ideal continuous stirred-tank reactor. A portion of activated sludge from the secondary settling tank is returned to the aerobic treatment tank. Use this information below to solve Questions 43 through 53. 

What is the net (or active) biomass yield as (g VSS)/(g bsCOD)?

What is the primary difference between removal and disinfection processes in reducing risk of pathogen infection?