Laserfiche WebLink
<br />,. " ., ~ . y ') < ." <br /> <br />['I U . 1. I J J ~'. L <br /> <br />~~D~ <br />'t1.3>Df'11 ~I ~> <br /> <br />Bloloi:1cal Air Filter Description <br /> <br />. <br /> <br />A biological. air filter, commonly referred to as II. biofilter, is used to capture and remove <br />organic matter in air streams that may cause nuisance odors, <br /> <br />The biofilter for the Arden Hiila plant of Friskies PetCar8 consists ofa bed of wood based <br />l:1edia installed in an open top concrete buin, The exhaust air from the plant is cooled <br />and humidified and directed through the media in an. upflow manner, <br /> <br />As the air passes through the moist filter media, the odors become dissolved in the <br />moisture film, Natura! microbes present on the media consume the dissolved organics as <br />a food soum: and break them down to carbon dioxide and water, Odor free air exits the <br />biofilter, <br /> <br />A bed of media usual1y lasts 3-5 years, breaks down into compost and is then replaced, <br />The spe,nt media can be used as garden mulch aIld soil conditioner, <br /> <br />Biofilters are gaining increased popularity for odor management in a wide variety of <br />applications such as municipal c~mposting facilities, sewage plants, rendering plants and <br />food production plants including pet food, spices and flavors, phannaeeuticals and nut <br />and coffee roasting, <br /> <br />. <br /> <br />RECEIVED <br /> <br />. <br /> <br />AUG 3 0 1999 <br /> <br />CITY OF P,RDE~J HILLS <br />