Enhanced alure-type biological system (E-ATBS) for carbon, nitrogen and phosphorus removal from slaughterhouse wastewater: A case study.

Slaughterhouse wastewater is one of the most harmful agriculture and food industrial wastewaters. The emissions of not fully treated slaughtering wastewater would cause eutrophication of surface water and pollution of groundwater. This study investigated the nutrient removal performance for the enhanced alure-type biological system (E-ATBS) in the full-scale application. During the whole study period, COD, TN and TP removal efficiencies were higher than 97.1%, 90.8% and 90.1%, respectively. The effluent concentrations were lower than the newest effluent standard in China to avoid the discharged water pollution. Partial denitrification (PD)-ANAMMOX was considered as the main approach for anaerobic NH4 + -N removal, which helped to guarantee the efficient N removal in the full-scale E-ATBS. Denitrifying P removal and aerobic P uptake ensured the efficient and stable P removal. E-ATBS is a promising technology especially for wastewater treatment in food processing facilities and should be widely popularized.