18-Env-A6 Solid Waste Engineering and Management · December 2014
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Reference texts: Tchobanoglous, Theisen & Vigil, Integrated Solid Waste Management: Engineering Principles and Management Issues; Vesilind, Worrell & Reinhart, Solid Waste Engineering; Davis & Cornwell, Introduction to Environmental Engineering (6th ed.); CCME, Guidance Document on Landfill Gas Management; Canadian Environmental Protection Act, 1999.
This paper prints marks IN FRONT of the question number on every line (e.g. "5 1. What are the elements…", "4 16. All 29 questions are answered in full.
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
Physical transformation processes (change the physical form without altering chemical composition): (1) component/mechanical separation (sorting into recoverable material streams); (2) size reduction (shredding/grinding to reduce particle size); (3) volume reduction (mechanical compaction/baling to increase density). Chemical transformation processes (alter the chemical form of the material, typically releasing energy): (1) combustion (complete oxidation with excess air, producing heat, CO₂/H₂O and ash); (2) pyrolysis (thermal decomposition in the absence of oxygen, producing char, oil and syngas); (3) gasification (partial oxidation with limited air/oxygen, producing a combustible syngas).
