CHE4151

Wastewater treatment processes

3 points
* 18 lectures and 18 tutorials
* Clayton
* Prerequisites: ENE3605 or CHE4112

Objectives The student is expected to develop knowledge and understanding of effluent quality standards for both domestic and industrial wastewaters; the hydraulic loads, composition and concentrations of the influent to a treatment plant; selection of appropriate treatment technologies; the technology and quantitative design of primary, secondary and tertiary treatment processes including anaerobic treatments; control and optimisation of wastewater treatment facilities. The student is expected to develop skills in the design of these various process arrangements.

Synopsis Sources and quantities of wastewater, collection, minimisation possibilities. Chemical and biological characteristics, wastewater microbiology. Requirements for treatment processes, effluent standards, scale of operation. Pretreatment. Primary treatment: coagulation, precipitation, filtration. Secondary treatment: aeration, microbiology, analysis and design of the activated sludge process, aerated lagoons, trickling filters, combined aerobic processes. Sedimentation. Process control and optimisation. Anaerobic processes, sludge handling and disposal. Tertiary treatment, nutrient removal processes, polishing. Cost of treatment options. Small scale treatment facilities. Effluent disposal.

Assessment Examination: 60%
* Assignments: 40%

Recommended texts

Hammer M and Hammer M Water and wastewater technology 3rd edn, Wiley, 1996
Tchobanoglous G and Burton F Wastewater engineering:Treatment, disposal and reuse McGraw-Hill, 1991