Question 6 of 18: Information Required for Designing an Industrial Waste Management System

Question 6: Information Required for Designing an Industrial Waste Management System (8 marks)

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.

Designing an industrial waste management system draws on several categories of information, each feeding a different part of the design. Production data — the products manufactured, production rate and schedule (continuous, batch, seasonal), and any planned future expansion, since the system must be sized for design-life, not just present-day, loading. Water-use data — process water, cooling water, wash-down and boiler make-up water quantities, which together with production data establish the wastewater flow. Waste characterization data — flow rate and its variability, BOD₅/COD, suspended solids, pH, temperature, oil and grease, and any toxic or priority-pollutant constituents specific to the process, ideally from an in-plant waste survey (Question 5) or, for a not-yet-built facility, comparable-industry published data. Regulatory requirements — the applicable sewer-use bylaw limits or direct-discharge permit conditions the treated effluent must meet, which set the required degree of treatment. Site data — available land area, topography, soil/groundwater conditions, and proximity to the receiving sewer or watercourse, which constrain which treatment technologies are physically feasible. Economic data — capital and operating cost estimates for the candidate alternatives, and the client's available budget. Existing infrastructure — any treatment or conveyance facilities already on site that a new system must integrate with or replace.