Based on the mass balance of this study a lifetime of 11.7 years can be expected for the CW-MFC based on the adsorption capacity of phosphates. If we consider, however, that the majority of P adsorbed by the system is in the form of SRP and that the primary removal mechanism of SRP is adsorption then the P adsorption capacity may be more accurately measured by the
ratio SRP/RP removal under RP loading .