PATHWAY:A COMPUTER MODEL TO DETERMINE SEWAGE SLUDGE PATHOGEN TRANSPORT THROUGH ENVIRONMENTAL PATHWAYS

摘要

A computer program is presently being developed to mode] the transport of pathogens through environmental pathways as a result of the application of treated sewage sludge. Specific sludge application cases include the use of treated sludge as a cropland fertilizer, a soil conditioner by the general public, and as a feed supplement for ruminant animals.nEach point in these pathways is treated as a mathematical state. The transfer of pathogens between these states is described by a set of ordinary differential equations derived using conservation principles, environmental parameters and relationships developed from data obtained in the literature review. These equations are then integrated to determine the pathogen populations at each state.