Review and compare, in detail and with the aid of sketches and diagrams, two different processes available for the large-scale treatment of sewage water. Analyse advantages and disadvantages associated with each design option and select one which would be best suited to serve a large residential area of approximately 750 000 people with a moderately large light industrial area. The resultant effluent should be of sufficient quality to permit safe discharge to sea or to a river.
Your review needs to cover;
Description two accepted processes Research on the web or visit local sewage treatment facilities (example Water Corporation in Perth). Describe 2 different options such as activated sludge, biological filter beds or pond/lagoon systems. Refer to advantages and disadvantages of each method.
Illustrations (sketches) Students should be able to draw labelled sketches contrasting 2 systems.
Compare differences in design Differentiate between the systems.
Distinguish between operational and design issues (advantages and disadvantages). Contrast systems and make a decision about the most appropriate system based upon population size and availability of land, water and discharge points etc.
Referencing, grammar and presentation.