Meeting Nutrient (phosphorous and Nitrogen) Removal Standards: TRE-4854-10-12: P

All Wastewater, Industrial Wastewater (Process) Chesapeake Bay water quality standards for nitrogen and phosphorus discharges are becoming more restrictive. Various options and operating practices currently used and available for removing nutrients from wastewater will be the focus of this class. Biological technologies will be addressed as to the ease (or difficulty) and cost of nutrient removal. The effluent concentration required will be discussed as to the appropriateness of Enhanced Nutrient Removal (ENR) techniques used to remove TN to less than 3.0 mg/l and TP to less than 0.3 mg/l. The importance of methanol addition or another carbon source like glycerin will be fully discussed as a food source for denitrifying organisms. Metal salt addition and effluent filtration for phosphorus removal will be presented. Nutrient removal regulations pertinent to protecting the Chesapeake Bay will also be discussed. Finally, operational issues related to TN and TP removal will be identified along with recommended corrections.