MICROCOMPUTER ASSISTED MODEL FOR PHOSPHORUS REMOVAL IN EXISTING WASTEWATER TREATMENT PLANTS IN THE CHESAPEAKE DRAINAGE BASIN (CAMPREP)

The removal of phosphorus from wastewater has risen in importance because of the eutrophication of surface waters. Recently, eutrophication problems have been noted in the Chesapeake Bay, and phosphorus control is an important part of the strategy to alleviate the nutrient problem. The large majority of the existing Chesapeake Bay Drainage Basin (CBDB) treatment facilities will have to be retrofitted to achieve phosphorus removal.; CAMPREP, the MicroComputer Assisted Model for Phosphorus Removal in Existing Wastewater Treatment Plants in the Chesapeake Bay Drainage Basin, is a menu-driven, user-friendly microcomputer-based methodology for the understanding, design and cost evaluation of phosphorus removal facilities. This design model was developed in conjunction with the EPA Center for Environmental Research report entitled, "Retrofitting POTWS for Phosphorus Removal in the Chesapeake Bay Drainage Area" (EPA, 1986). The purpose of CAMPREP is to provide an easily utilized method to estimate retrofitting costs associated with phosphorus removal and to assist in retrofit design selections. Further, it provides an alternate method of disseminating information on phosphorus removal to the states discharging to the Chesapeake Bay.; To fully understand the capabilities and limitations of CAMPREP, a two part cost analysis on the cost graph data available in the EPA report was performed. This analysis included a statistical evaluation of the CAMPREP retrofit cost values utilizing Bartlett's Test for equal variances and an Analysis of Variance to determine the main effects for the effluent and influent phosphorus levels on the cost data. The second part of the cost output analysis involved a comparison of CAMPREP cost output to retrofit cost data obtained from several treatment plants which have recently upgraded for phosphorus removal.; Finally, instructions for manually editing the CAMPREP text files and computer code are furnished. The CAMPREP diskettes may be obtained for the Environmental Engineering Department at Rensselaer Polytechnic Institute.