Table 1.

Concentration of cations and anions measured in the catholyte obtained from the different FFC MFCs.

Concentration g/l	Na+	${{\text{NH}}_4}^{+}$	K+	Ca2+	Mg2+	Cl−	${{\text{PO}}_4}^{3-}$	${{\text{SO}}_4}^{-}$
FFC Thin	1.7 ± 0.07	4.2 ± 0.4	2.1 ± 0.1	0.015 ± 0.004	0.0077 ± 0.005	1 ± 0.03	1.01 ± 0.06	1.13 ± 0.08
FFC Thin OCV	1.9 ± 0.07	5.0 ± 0.3	1.9 ± 0.2	0.013	0.003	1.21	1.12	1.35
FFC Medium	2.34 ± 0.3	4.6 ± 0.2	3.0 ± 0.3	0.015 ± 0.004	0.003	0.8 ± 0.04	0.85 ± 0.08	0.88 ± 0.02
FFC Medium OCV	2 ± 0.08	3.5 ± 0.2	2.4 ± 0.2	0.016	0.003	0.95	1.0	1.1
FFC Thick	2.1 ± 0.15	4.2 ± 0.18	2.8 ± 0.2	0.025 ± 0.0004	0.007	0.64 ± 0.05	0.78 ± 0.01	0.81 ± 0.01
FFC Thick OCV	2.4 ± 0.1	5.1 ± 0.3	2.8 ± 0.2	0.036 ± 0.001	0.009
Urine	1.9 ± 0.005	5.6 ± 0.04	2.9 ± 0.18	0.09 ± 0.004	0.046 ± 0.02	0.99 ± 0.02	0.73 ± 0.02	0.86 ± 0.02