The present invention provides waterless and odorless urinal system. The obejct is achived by the formation of an coating of the silver nanopartcile colloidal composition on the surface of the urinal system . Silver nanopartcile colloidal composition exhibit the property to inhibit the grrowth of the odor causing bactria, In an optinal feature invention provides silver nanoparticle cake made up by mixing silica or cement with silver nanoparticles.
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