To study matrix effects on

In addition, the following standard wastewater parameters before and after biological treatment were determined: NH4–N, NO3–N, COD and DOC. A decline in the amounts of NH4–N, COD and DOC was observed, whereas NO3–N increased, which confirmed that CNX1351 nitrification occurred and that bioreactor performance was adequate when hospital wastewater was introduced into the system (SM-II). The average removal efficiency for hospital wastewater was higher (59 ± 15% for CP and 35 ± 9.3% for IF) than for artificial wastewater (42 ± 12% for CP and 18 ± 11%; Table 4), however these values cannot be compared directly due to the different compositions of artificial wastewater and hospital wastewater.