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<br />~ 4 <br />d QJ ~ <br />1 '.'.. ~ ' <br />'_ ~;. <br />LITTLE CEDAR BAYOU WASTEWATER TREATMENT PLANT <br />SOLIDS HANDLING IMPROVEMENTS <br />Changes in design criteria by the Texas Natural Resource Conservation Commission (TNRCC) prompted the <br />City to retain Camp Dresser and McKee (CDM) to perform an evaluation of the sludge processing facilities at <br />the Little Cedar Bayou Wastewater Treatment Plant. CDM concluded that the sludge processing facilities at <br />the Plant are not currently sized to handle the permitted flow of 7.56 million gallons per day (MGD) utilizing <br />the new criteria. Should these facilities not be improved, the permitted flow at the Plant could be reduced by <br />up to 50%. This reduction in capacity would require a plant expansion or perhaps moratorium on future <br />development. <br />The recommended approach was based on alternative evaluations. The recommended sludge handling <br />facilities improvements include: <br />• Modification to Waste Activated Sludge pump station for process control, <br />• Expansion of the existing aerobic digestion process to provide for minimum sludge detention time <br />required by the TNRCC, <br />• Renovation of existing gravity sludge thickener, <br />• Replacement of thickened sludge pumps, and <br />• Construction of a new sludge dewatering/loading building, with the replacement of the existing belt filter <br />press with two (2) new belt filter presses. <br />The proposed cost for these improvements total $3,500,000. These improvements will provide for improved <br />solids handling, ensure continued compliance with existing and upcoming TNRCC regulations and design <br />criteria, and maintain the current 7.56 MGD capacity at the Plant. <br />1 <br />(6) <br /> <br />