This project investigated treatment options for Combined Sewer Overflow (CSO) discharges that were compact, reliable and economical.
Historically, research on CSO design has focused on effective and efficient upgrading through reducing CSO spill volumes, increasing sewer system capacity and/or increasing storage capacity within the system. These polutions are sometimes impractical and may have high costs associated with them.
The work undertaken by WRc for UK Water Industry Research (UKWIR) examined about 50 process options for treating intermittent discharges as an alternative to storage provision. A short list of potential options were identified including reed beds, ballasted sedimentation and bilogical treatment. The feasibility of developing mathematical simulations of selected processes or options were assessed. The options cost, size, performance and reliability for treating discharges were also evaluated.