Laserfiche WebLink
Metropolitan Wastewater Management Commission Capital Improvement Program <br /> <br />PRIMARY SLUDGE THICKENING <br />Description: <br /> Install gravity thickener system (covered for odor control), upgrade thin primary sludge <br />pumping and piping systems, install supernatant overflow pumping and piping, and <br />thickened sludge piping/pumping to digesters. See Odorous Air Treatment – Phase 2 for <br />treatment of odors. <br />Status: <br />As of December 2010, the project is in the design development phase. The construction <br />bidding phase is anticipated to start in spring of 2011. <br />Justification: <br /> Thicken sludge before the digester system and help keep the sludge blanket lower in <br />primary clarifiers to avoid washout of the sludge blanket during peak flow events. <br />Project Driver: <br />Meet class B biosolids requirements during peak two-week solids loading event with all <br />three existing digesters in service. <br />Project Trigger: <br />Availability of sludge thickening capacity is needed prior to next scheduled digester <br />cleaning (i.e., before 2013). <br />Project Type: <br />100% Capacity <br />Improvement SDC Eligibility: <br />65% <br />Estimated Project Cost <br />: $4,498,000 (Note: Part of the project money will support the treatment plant <br /> landscape upgrades. Also, MWMC received a state revolving fund (SRF) loan <br /> for the primary sludge thickening project) <br />Expected Cash Flow: <br />FY 07-08 = $9,730; FY 08-09 = $40,606 FY 09-10 = $501,876; <br />FY 10-11 = $1,893,788; FY 11-12 = $2,027,000; FY 12-13 = $25,000 (administration, <br />construction, landscape, consultant services, etc.) <br />Prior2010-11 <br />Expenditure/Category:YearsEst. Act.2011-122012-132013-142014-15201-165Total <br />Design/Construction $552,212$1,893,788 $2,052,0000000$4,498,000 <br />Other 00000000 <br />Total Cost $552,212 $1,893,788 $2,052,000 $0$0$0$0$4,498,000 <br />Page 55 DRAFT FY 11-12 BUDGET AND CIP <br />