18-Env-A6 Solid Waste Engineering and Management · May 2016
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.
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.
(1) Weight-volume (scale) analysis — directly weighing incoming collection loads at a facility scale over a representative study period; the most accurate method where a scale exists, since it avoids assuming a density/compaction factor. (2) Load-count analysis — recording the number and approximate volume/type of collection-vehicle loads delivered, combined with an assumed or previously measured average density, useful where no weigh scale is available. (3) Materials-balance (per-capita) analysis — applying known per-capita or per-source generation factors to population or business counts, the only option available for forecasting or for a community with no direct collection/weighing data yet in hand.
