Table 3.

Initial and final concentrations of PO₄, NH₄, and Mg in sludge dewatering liquors before and after 10 days of incubation with selected bacteria.

		PO4 (mg P/L)	NH4 (mg N/L)	Mg (mg/L)
Experiment A
Initial		39.1 ± 0.5	708 ± 6	51.7 ± 0.8
Final	B. antiquum	18.9 ± 1.3	711 ± 11	34.1 ± 1.3
	B. pumilus	19.1 ± 0.2	704 ± 3	35.8 ± 1.6
	H. salinarum	20.7 ± 0.4	711 ± 3	36.4 ± 1.0
Experiment B
Initial		35.5 ± 1.0	887 ± 42	47.5 ± 0.1
Final	B. antiquum	24.0 ± 2.8	827 ± 16	30.7 ± 1.2
	B. pumilus	20.8 ± 1.1	814 ± 6	28.8 ± 0.5
	H. salinarum	21.0 ± 2.8	814 ± 20	29.2 ± 1.0

In Experiment A the pH was controlled through acid addition and in Experiment B the pH controlled by limiting degassing in closed serum bottles.