TABLE 1.

Parameters for each of the six experiments conducted using μBR

Run name	Microfluidic geometry	Flow rate (ml/h)	pH	Ammonia level (mg N/liter)	Duration (wk)
S1	Shear	0.005	7.0	250	12
S2	Shear	0.010	7.0	250	8
PH1	Gradient	0.010	5.5-8.0	250	5
PH2	Gradient	0.010	6.5-8.5	250	3
A1	Gradient	0.010	7.5	250-2,500	1
A2	Gradient	0.010	7.5	250-2,500	4