This study was performed to investigate of substrate characteristic of COD for piggery wastewater of nutrient(nitrogen and phosphorus) removal. The influent COD of the piggery wastewater is divided into readily biodegradable COD(Ss) , slowly biodegrad...
This study was performed to investigate of substrate characteristic of COD for piggery wastewater of nutrient(nitrogen and phosphorus) removal. The influent COD of the piggery wastewater is divided into readily biodegradable COD(Ss) , slowly biodegradable COD (Xs), inert soluble COD(SI) and inert suspended COD(XI). Percents of each form were resulted as 36.6%, 29.7%, 7.7%, and 27%, respectively. The ammonia nitrogen was utilized via stripping, nitrification, autotrophic cell synthesis, heterotrophic cell synthesis, and aerobic denitrification. The removal percents by each step were resulted as 12.9%, 43.1%, 15%, 3.2% and 25.7%, respectively.