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Wastewater Treatment

  • How settling of organic compounds is prevented in grit chamber?
  • How to separate oil and grease from industrial waste?
  • What are types stabilisation ponds? Give their design parameters.
  • What factors govern oxygen transfer efficiency of mechanical surface aerators?
  • What is sludge bulking in Activated sludge process. Explain reasons and remedies.
  • What is role of recirculation ratio in maintaining MLSS conc. in aeration tank?
  • Differentiate hydraulic retention time and solids retention time.
  • Explain design principle for secondary settling tank.
  • What is sludge thickener? Why it is necessary?
  • Differentiate between complete mix and laminar flow reactors.
  • Explain nutrient requirements for aerobic and anaerobic treatment.
  • How to control performance of anaerobic sludge digester.