ENE 280 Study Guide - Midterm Guide: Rotating Biological Contactor, Activated Sludge, Secondary Treatment
Document Summary
Lecture 24: list the basic stages of municipal wastewater treatment. Preliminary treatment (removes materials that can cause operational problems) Primary treatment (remove ~60% of solids and ~35% of bod) Secondary treatment (remove ~85% of bod and solids) Advanced treatment (varies: 95%+ of bod and solids, n, p) Sewage microorganisms use organic matter from sewage as their food supply, leading to decomposition or biodegradation of organic wastes: name the two types of growth processes used in secondary wastewater treatment. State two examples for each: dispersed (suspended) growth: activated sludge, oxidation ponds, fixed growth: trickling filters, rotating biological contactors, describe parameters that affect the activate sludge process. High density of microorganisms (keep organisms in system) Good contact between organisms and wastes (sufficient mixing) No toxic chemicals present (control industrial inputs: define food-to-microorganism ratio . Chemical: raise ph to convert ammonium ions to ammonia. Lecture 27: list the basic sludge treatment process.
