Method and system for processing of a liquid containing water and containing urine andor other contaminants in a two step process. Also provided herein are vectors and host cells comprising those nucleic acid sequences, chimeric polypeptide molecules comprising the polypeptides of the present invention fused to heterologous polypeptide sequences, antibodies which bind to the polypeptides of the present invention and to methods for producing the polypeptides of the present invention. A primary power distribution system is located below the worksurface. The oscillating device oscillates the modulating signal of a frequency fm.