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.k Similar Projeci Experience 6-7 ? Assistance during pre-start-up "water" testing and during start-up activities such as digester seeding and transition of flow from the old residuals facilities to the new ones Mashantucket Pequot Tribe, Ledyard, Connecticut Metcalf & Eddy provided initial studies, developed the preliminary and final designs, and constructed the $20 million upgrade and expansion of the wastewater treatment plant at Foxwoods Casino near Ledyard, Connecticut. In conjunction with the addition of a 17-story hotel, convention center, and tribal museum, the Mashantucket Pequot tribe has contracted with M&E to expand the treatment facility from 1.0 to 3.6 mgd within a tight time frame and under severe space constraints. The plant now uses covered sequencing batch reactors for odor control and year- ?,?E tee'daved the '199,9 Engineerang, Exc0enee round nitrification and denitrification. ????? #rc?m ?e ??ri?rlaara ?Car?s?i3irac?' E?g?r??e?rs Effluent polishing is provided by ?o?lr?a?;l ?fi ?las:saOhu$et?s ?cu ?Yae 7 ???twc?iod? innovative disk-type filtration and high- ' +° ~•~ --' - , ._..: .. , . ;. .... . t , . . ?. . . , . ; . . _ ; intensity, medium-pressure LJV disinfection. Treated effluent is then discharged to rapid infiltration beds. The plant was designed to meet BODS goals of Smg/I, TSS goals of 5 mg/1, TN goals of 8 to 10 mg/l, and TP goals of 1 mgil. M&E staff inembers examined numerous options for water reuse, odor control, sludge dewatering, and future expansion scenarios. The facility's proximity to the casino complex requires that the plant blend in with its f surroundings and that the resort's large number of visitors be shielded from odors, noise, and sludge truck traffic. With this in mind, Metcalf & Eddy redesigned the liquid sludge thickening and disposal processes and added an expanded waste-activated sludge storage tank and decanters to prethicken the waste sludge, which then is dewatered in a centrifuge. Because of tight space constraints, dewatered sludge is distributed to roll-up dumpsters using a double-belt conveyor that moves the dewatered sludge vertically. These improvements have resulted in a 75% decrease in sludge truck traffic. Additional M&E services will include start-up, O&M support, and staff training.