Paper format. National Examination, December 2018 —
16-Civ-B5 Water Supply and Wastewater Treatment. Three hours, closed book, one aid
sheet written on both sides, and only an approved Casio or Sharp calculator.
Question 1 is compulsory and candidates attempt any three of Questions 2–5;
every question carries 25 marks. Marks are shown at the end of each question and the
paper explicitly invites candidates to state any assumptions they make.
All five questions are worked below, because the set is a study resource rather
than a three-hour sitting.
Reference texts.
- Metcalf & Eddy / AECOM, Wastewater Engineering: Treatment and Resource
Recovery, 5th ed. — Ch. 2 (wastewater constituents, nitrogen forms,
alkalinity, COD), Ch. 8 (suspended-growth treatment: SRT, SLR, clarifier
design), Ch. 13 (sludge stabilisation), Ch. 8–9 (lagoons).
- Crittenden et al., MWH's Water Treatment: Principles and Design,
3rd ed. — Ch. 9 (coagulation and flocculation), Ch. 11 (sedimentation),
Ch. 13 (granular filtration and backwashing), Ch. 13–14 (UV and
chemical disinfection).
- Davis & Cornwell, Introduction to Environmental Engineering, 5th ed.
— Ch. 4 (softening, alkalinity, iron and manganese), Ch. 6 (biological
wastewater treatment).
- APHA/AWWA/WEF, Standard Methods for the Examination of Water and Wastewater
— Method 2320 B (alkalinity by titration), Method 5220 (COD),
Method 4500-NH3 (ammonia).
- Health Canada, Guidelines for Canadian Drinking Water Quality —
guideline technical documents for nitrate/nitrite, sulphate, manganese and iron;
CCME, Canadian Water Quality Guidelines for the Protection of Aquatic Life
— ammonia.
