Rheology and Microbiology of Sludge from a Thermophilic Aerobic Membrane Reactor

Table 1

Rheological tests performed: operative conditions.

Test #		Operative conditions			Shear rate; s^−1
		Average pH	Average temperature [°C]	Aeration
Sample A; (150 gTS L^−1)	1	6.7	44.5	N	700, 800, 900, 1000
	2	6.7	45.2	Y	700, 800, 900, 1000
	3	7.7	45.1	N	700, 800, 900, 1000
	4	8.3	45.3	Y	750, 800, 900, 1000
	5	9.0	45.1	N	750, 800, 850, 900, 1000
	6	9.1	44.9	Y	800, 850, 900, 1000
Sample B; (190 gTS L^−1)	7	7.0	45.4	N	500, 600, 750, 900, 1000
	8	6.7	45.3		500, 600, 750, 900, 1000
	9	6.6	45.0	Y	500, 600, 750, 900, 1000
	10	7.8	44.9	N	500, 600, 750, 900, 1000
	11	8.3	45.2		500, 600, 750, 900, 1000
	12	8.4	45.3	Y	500, 600, 750, 900, 1000
	13	8.9	45.0	N	500, 600, 750, 900, 1000
	14	9.0	45.3		500, 600, 750, 900, 1000
	15	9.1	45.0	Y	500, 600, 750, 900, 1000

N: no aeration; : limited aeration (0.5  min⁻¹); Y: full aeration (1  min⁻¹).