CIV342H1 Lecture Notes - Lecture 7: Activated Sludge, Anaerobic Digestion, Aerobic Treatment System
Document Summary
Common at wwtps to reduce the volume of waste activated sludge that needs to be disposed. Waste from recycle line in activated sludge process can go into anaerobic digester. Same idea as aerobic treatment: dissolved organics difficult to remove, so use microorg. to consume. Atp contains large amounts of energy stored in high energy phosphate bonds - this energy is released when the bonds are broken. All biological reaction are redox reactions: leo the lion says ger: lose e = oxidation (substrate), gain e = reduction. In wastewater treatment, electron donor is substrate (organic wastewater) Electron acceptors: aerobic - o2, o2 co2, anoxic - no3. 2 h2s and co2, co2 ch4 and sugar ethanol + Empirical cell formula: c5h7o2np0. 2 - cell needs n and p. Macronutrients needed by all bacteria: s, na, k, ca, mg, fe. Each anaerobic type bacteria has a role: fermenters, acetogens, methanogens, sulphate reducers. Acid concentration is an indicator of the reactor"s health .
