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Page WEEKEND OUTLOOK FridayMay 17 19 -Environment- Researchers claim soil can digest industrial waste Provided by the University of GuelphB Ontario Agricultural College OAC Dr Hob McLaughlin dean Intensely manned soil can digest a surprising amount of organic industrial waste Thats what University of Guelph soil scientists have discovered after a landfarming project involving oily carbonbased waste from in dustries near Sarnias Chemical Valley In field tests near Sarnia and in laboratories a team led by land resource scientist Paul Voroney has determined that methodical management can double the speed of waste breakdown at land treatment sites Although a variety of factors is involved in the breakdown of waste this research suggests that provincial guidelines gover ning the amount of oily waste that can be applied to a treatment site be increased by 50 per cent providing the site is properly managed Land farming uses the living microbes found naturally in soil to treat organic waste material in a costeffective manner The soil microbes consume the complex organic mixture found in oily in dustrial waste converting it into a dark usable soil and into sim ple harmless materials like water and carbon dioxide Typical landfarm sites are about five acres Small means controlled well monitored and managed says Voroney Sites are usually located near refineries and drained to prevent the hazard of leaking waste After a site expires the land can be used for other purposes such as a park or sports field Industries find land farming at tractive because it isnt costly 20 a ton compared with chemical waste incineration 100 to a ton or mixing the waste with cement and burying it at a landfill site to a ton But because of the relative newness of this form of waste disposal industries have not known how to best manage land- treatment sites Voroney and his team set out to change that Conventionally waste is simply applied to a treat ment sites soil surface about once a week during the 20week land farming season and mechanically worked in at that time Bur the researchers in tervened by spreading fertilizer on the treated site Fertilizer speeds the breakdown process by supplying the necessary nutrients for microbe growth mainly nitrogen and phosphorus In addition they reduced the frequency of application by per cent which allowd them to in crease the volume because there was more time for soil- management techniques such as tilling monitoring soil nutrient levels and adjusting moisture content between applications These strategies made the site able to break down more waste says Voroney This research is sponsored by the Institute for Chemical Science and Technology which aims to enhance the international competitiveness of the Canadian chemical industry and the inter national contributions of Cana dian chemical research by com bining the skills and resources of industry universities and government agencies Guelph conservation conference has historical roots Please remember to recycle this newspaper along with your glass bottles and jars aluminum and steel food and beverage cans plastic soft drink containers RECYCLING It only works if we all do our part During a time of deep en vironmental concern delegates to this conference will look back to the original Guelph Conference of held years ago and ahead to the years of con servation in Ontario Guelph Con ference 91 will be held on May 23 at the University of Guelph Leading conservationists who met at the Guelph Conference of 1941 laid the foundation for much of the management of Ontarios natural resources during the last 50 years including the formation of the conservation authorities of Ontario Delegates to the Con ference wanted to take action t reduce the effects of flooding erosion and water pollution in Ontario Recognizing that reforestation wildlife manage ment soil utilization and water and erosion control are in tegrated the delegates recom mended conservation planning on a provincial scale and action on a watershed basis Todays conservation authorities work to carry out the conservation activity that was strongly recommended at the original conference under the phrase integrated resource management The Province of Ontario is he only province in Canada that has such an exten sive system of conservation authorities The 1941 Guelph Con ference and the conservation authorities that resulted from it were two of the most important conservation movements in Canadian history Delegates to the original con ference included citizens academics senior public ser vants and environmental action groups Two of these groups the Federation of Ontario Naturalists and the Ontario Federation of Anglers and Hunters will par ticipate in this years conference The conference is sponsored by the Association of Conservation Authorities of Ontario The con ference agenda Includes a historical perspective the state of Ontarios natural resources the perspective the academic perspective and a panel 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