Intermittent Discharges - Environmental Review and Treatment Solutions
ISBN: 1 84057 256 6
Research was carried out into unconventional treatment options for Combined Sewer Overflows (CSOs) to find potential compact, reliable and cost-effective solutions to improve the quality of intermittent discharges. Future standards for discharges may dictate that storage or increased sewer capacity will not be satisfactory. No single wastewater treatment process is sufficient for all eventualities, but twelve processes were deemed technically and economically suitable for further consideration. The disadvantages and advantages of each of these processes in relation to treatment at CSOs were investigated. Most favoured processes are: ballasted lamella plate sedimentation for a large urban CSO; reed bed treatment for a small rural CSO; and chemical pre-treatment followed by UV disinfection for a CSO discharging into bathing waters. Pilot plant testing should be carried out in each case.
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