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23-Chem-B2 Environmental Engineering: December 2015

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

  1. Question 1 Wastewater treatment-step design principles, and cyclone/scrubber design considerations for particulate and corrosive-gas control
  2. Question 2 Application ranges of gravimetric settlers, electrostatic precipitators and fabric filters
  3. Question 3 PCB soil remediation, and reliability/reproducibility in air-quality measurement
  4. Question 4 Water-quality parameter measurement, BOD dilution-test analysis, and dissolved air flotation
  5. Question 5 pH control, ion exchange and reverse osmosis mechanisms, and activated-sludge process design
  6. Question 6 Gaussian plume dispersion of a coal-fired power-plant SO₂ stack, and emission-reduction measures
  7. Question 7 Photochemical smog reactions, engineered benzene control, and biological rendering-plant odour control

Start with Question 1 →

Paper format. EGBC 04-Chem-B2 Environmental Engineering, December 2015, 3 hours, closed-book with a candidate-prepared double-sided 8½×11-inch aid sheet. Seven problems, each worth 20 marks; candidates attempt any five, and only the first five answers in the workbook are marked. All seven problems are solved below as a complete study resource.

Reference texts: G. Tchobanoglous, F. L. Burton & H. D. Stensel (Metcalf & Eddy), Wastewater Engineering: Treatment and Reuse (4th ed., McGraw-Hill) — BOD kinetics, dissolved air flotation, activated-sludge design; M. L. Davis & D. A. Cornwell, Introduction to Environmental Engineering (5th ed., McGraw-Hill) — drinking-water treatment, air pollution control, ion exchange, reverse osmosis, soil remediation; C. D. Cooper & F. C. Alley, Air Pollution Control: A Design Approach — cyclones, scrubbers, fabric filtration, electrostatic precipitation, odour control; S. P. Turner, Workbook of Atmospheric Dispersion Estimates (2nd ed., CRC Press) — the Gaussian plume model and Pasquill–Gifford stability classes. Canadian context follows the Canadian Environmental Protection Act (CEPA 1999), the Canadian Council of Ministers of the Environment (CCME) Municipal Wastewater Effluent and Drinking Water Quality guidelines, and provincial air/water permitting practice (e.g. BC Environmental Management Act, Metro Vancouver air-quality bylaws).