CIV342H1 Lecture Notes - Lecture 1: Walkerton E. Coli Outbreak, Iso 9000, Suspended Solids
Document Summary
Gudi - groundwater under the direct influence of surface water. Established after walkerton tragedy - source water protection. Multi-barrier approach: source water protection, treatment, distribution. Drinking water treatment objectives: safe for human consumption, appealing to the customer (taste, odour, colour, temperature, using facilities which can be constructed and operated at reasonable cost. Removal of: pathogenic organisms, suspended materials, hazardous contaminants, odours, unpleasant tastes and colour. Wastewater treatment objectives: clean wastewater so that it can be discharged into the environment. Removal of suspended materials, treatment of biodegradable organics, elimination of pathogenic organisms, removal of nutrients (p & n), removal of toxic compounds. Hierarchy of criteria: 1) safety (health) 2) aesthetics 3) serviceability (e. g. hardness) Maximum acceptable concentration (mac) - established for substances that are known to cause adverse health effect. Interim maximum acceptable concentration (imac) - interim limits used for substances for which there is insufficient toxicological data. Water quality objectives based on: 1) health effects 2) aesthetics - taste and.
