Table 3.

Oxygen consumption and chemical oxygen demand (COD) utilization mass balances in the experimental runs.

Run	SMX conc. (mg/L)	Initial peptone mixture COD (mg/L)	Oxygen consumed (mg/L)	COD utilized (mg/L)	COD bound (mg/L)	Remaining soluble COD (mg/L)
						Total	Soluble metabolic product, S P	Peptone mixture + SMX
Run 1	–	600	211	600	–	36	36	–
Run 2	50	600	206	515	85	182	31	151
Run 4	50	720	278	695	25	122	42	80
Run 5	50	720	275	688	33	135	41	94

SMX, sulfamethoxazole.