Consider that in your process design work in this unit you are attempting to reduce the biochemical oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS), and total suspended solids (TSS) concentrations, among other analytes listed on the laboratory reports embedded within the interactive model. Further, we learned in Unit I that solids can contribute up to 60% of the BOD concentrations in wastewater (Bahadori, 2014). Now consider Bahadoris (2014) comment regarding the fact that BOD and COD are seldom reduced significantly with chemical flocculation. You may need to revisit the definitions of these terms in Bahadoris (2014, pp. 281, 300-302) section of definitions and terminology.

1. Which treatment strategy would you suggest (filtration or chemical flocculation) in order to engineer a reduction in TDS concentrations? Why?

2. Which treatment strategy would you suggest (filtration or chemical flocculation) in order to engineer a reduction in TSS concentrations. Why?

3. Working with the interactive model embedded within the Unit III Lesson in the Study Guide, what chemical treatment equipment did you design into your treatment process? Why did you select this specific equipment for your process?