WRc examined the headroom available at an activated sludge sewage works to explore how much third-party sludge could be accepted without compromising compliance with consents.
The modelling looked at the effects of having one lane out of operation and the benefits of flow balancing at the sludge import point as against having tankered sludges discharge directly into the main flow.
Estimates of the permitted additional sludge imports for the different scenarios were produced, indicating that the sludge imports could be increased by at least three-fold.
