Review of the Technically Achievable Limits (TAL) for Biochemical Oxygen Demand and Ammonia

Regulation of treated wastewater discharges by the water industry is underpinned by control of ammonia and BOD via limits in Environmental Permitting Regulations (EPR) Water Discharge Activity Permits. We have established an industry standard or technologically achievable limit (TAL) for these two parameters that we would not set a permit limit below. However, these TAL limits were established more than a decade ago and it is appropriate to review them at regular intervals. This project is to carry out these review...