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18-Env-A4 Water and Wastewater Engineering: December 2016

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Definitions — Water and Wastewater Terminology
  2. Question 2 Nitrogen Species and Removal; Chlorination Chemistry vs. UV Disinfection
  3. Question 3 Raw Water Intake Structures; BOD Test with Temperature Correction
  4. Question 4 Water Distribution System Layout; Anaerobic Digestion of Sludge
  5. Question 5 Brief Descriptions — Water and Wastewater Treatment Concepts

Start with Question 1 →

National Exams / EGBC — December 2016 — 04-ENV-A4 Water and Wastewater Engineering. Three-hour exam; Question 1 is compulsory (25 marks) and any three of the remaining four questions are required (25 marks each); all five are solved below for completeness. Closed book, one double-sided aid sheet permitted, approved calculator permitted.

Reference texts: Metcalf & Eddy, Wastewater Engineering: Treatment and Resource Recovery (5th ed.) — grit removal, the BOD test and azide modification, nitrogen speciation and removal, anaerobic digestion, sludge volume index; Davis & Cornwell, Introduction to Environmental Engineering (6th ed.) — the Streeter–Phelps oxygen sag, indicator organisms, water intake structures, distribution-system layout; MWH's Water Treatment: Principles and Design (3rd ed.) — ion exchange, fluoridation/defluoridation.