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

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

  1. Question 1 Definitions — Water and Wastewater Terminology
  2. Question 2 Phosphorus Speciation/Removal and Chlorination vs. UV Disinfection
  3. Question 3 pH in Water Treatment; Carbonaceous BOD and Ultimate BOD
  4. Question 4 Alkalinity Titration Classification; Anaerobic Digestion
  5. Question 5 Brief Descriptions — Water and Wastewater Treatment Concepts

Start with Question 1 →

National Exams / EGBC — May 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.) — nitrification, BOD test theory, alkalinity/anaerobic digestion, phosphorus removal, disinfection chemistry; Davis & Cornwell, Introduction to Environmental Engineering (6th ed.) — the Streeter–Phelps oxygen sag, pH and coagulation–flocculation chemistry, water hardness; MWH's Water Treatment: Principles and Design (3rd ed.) — granular filtration (headloss, backwash) and ion exchange.