title: [Determination of the effect of clinoptilolit on the BOD (biochemical oxygen demand) of the waste waters from pig farms].
abstract: The passage of sedimented refuse water from pig-breeding farms through a clinoptilolit filtre of a grain size of 1.0 up to 0.5 mm leads to a decrease in BNO5 (the biochemical need of water) of such water by about 21 per cent. This is of interest to the purification of wastage waters associated with the everyday life as well as of refuse waters linked with animal-breeding activity, with special reference to keeping waters clean.
mesh_terms: D000538:Aluminum Silicates; D000818:Animals; D002031:Bulgaria; D005243:Feces; D005374:Filtration / Q000295:instrumentation; D010100:Oxygen; D012972:Sodium Hydroxide; D013552:Swine; D014876:Water Pollution / Q000517:prevention & control
chemical_list: D000538:Aluminum Silicates; D012972:Sodium Hydroxide; D010100:Oxygen
vernacular_title: Opredeliane vliianieto na klinoptilolita vurkhu BPK (biokhimichna potrebnost ot kislorod) na otpaduchna voda ot svineferma.