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Various sites, both existing and future potential sites, were identified <br />for a septage and grease waste management facility. Each site was <br />evaluated in terms of several criteria and then ranked. The Gifford/North <br />Subregional Wastewater Treatment Plant site,was found to be the single most <br />favorable location for the facility. <br />For the receiving, treatment, and disposal of septage and grease wastes, <br />several alternative units and processes were discussed and evaluated. The <br />evaluation included both economic considerations and factors other than <br />costs. The recommended alternative is that the existing Gifford Wastewater <br />Treatment Plant be modified to be used as a receiving facility for mixed <br />loads of septage and grease. A grease concentrator would be installed for <br />removal of the grease component, and the grease would be trucked to the <br />County's sanitary landfill for disposal. The septage would be stabilized <br />and dewatered in the recommended solids treatment facilities of the North <br />Subregional Wastewater Treatment Plant. Solid residuals would be hauled to <br />the County's sanitary landfill for disposal. <br />Disposal of treated septage and grease wastes is recommended to be within <br />the lined portion of the County's future landfill cell. Disposal of <br />treated septage will he in conjunction with the recommended disposal plan <br />for treated wastewater sludge. Grease will be disposed of in holes <br />excavated in the working face and covered by an adequate layer of waste <br />before compaction." <br />" 7.2.2 DESCRIPTION OF RECOMMENDED FACILITIES <br />Rased on the evaluations conducted within this report, it is recommended <br />that Indian River County take the necessary steps to implement Septage and <br />Grease Waste Management Alternative 1. This recommended alternative <br />consists of the following process units: <br />o A receiving facility located at the Gifford/North Subregional <br />Wastewater Treatment Plant -site. This alternative was selected <br />based on the ability to modify the existing Gifford wastewater <br />treatment facility. If such modifications are determined <br />structurally "unsound", a new receiving facility could be <br />constructed without changing the present worth ranking of the <br />recommended alternative. <br />o Grease concentration at the central receiving facility located at <br />the existing Gifford Wastewater Treatment Plant. <br />o Anaerobic digestion at the North Subregional Wastewater Treatment <br />Plant to he built on the existing Gifford site. It is the <br />recommendation of this report to blend the septage wastes into the ' <br />13 <br />FEB 2 1987 Boor 6 7 F yF 17 <br />