City of Grand Ledge Water Supply Studies Studies Overview Exis - - PowerPoint PPT Presentation
City of Grand Ledge Water Supply Studies Studies Overview Exis istin ing ir iron removal l pla lant approachin ing end of useful l li life Three studie ies to evaluate water supply ly repla lacement: New iron removal
Water Supply Studies
istin ing ir iron removal l pla lant approachin ing end of useful l li life
ies to evaluate water supply ly repla lacement:
ions/present worth analy lysis is
Iron removal l pla lant util iliz izin ing an Aeralater.
lied by three groundwater well lls.
istin ing system
phosphate
0.86 0.87 0.91 1.65 1.67 1.74
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2005 2010 2015 2020 2025 2030 2035 2040 2045
De Demand (m (mgd) Ye Year
Projected Water Demands - Cit ity of Grand Ledge
Historical ADD Historical MDD Projected ADD Projected MDD
lant capacity of 4.0 mgd id identif ifie ied by Cit ity.
is capacit ity was used as a basis is
ign for studie ies.
Iron Removal l Treatment Objectiv ives:
install ll new ir iron removal l treatment system
ir of exis istin ing Aeralater
isting treatment buil ildin ing
O&M Costs for the Selected Alt lternativ ive
O&M Cost It Items Annual Cost La Labor $32,400 Chemical Usage $24,000 Ele lectrical Usage $41,000 Gas Usage $4,500 Reagents, , Standards $3,000 Annual O&M Costs $104,9 ,900
Summary ry of Project Costs
Cost Category ry Estimated Costs
Treatment Pla lant $8,690,000 Sitework $2,430,000 Work at t Remote Sites $828,000 Total Construction Cost Opinion $11,9 ,948,0 ,000 Pil ilot Study $75,000 Corr rrosion Control Study $180,000 Engineering $1,200,000 Administrative, Le Legal, , Bonding $50,000 Total Proje ject Cost $13,4 ,453,0 ,000
its of softened water
logie ies:
is removes alm lmost all ll dis issolv lved soli lids, in inclu ludin ing hardness components
permeable le membrane usin ing pressure
ires ir iron removal l pretreatment
lend water wit ith ir iron pla lant dis ischarge to meet target hardness
Typical Reverse Osmosis Skid
Advantages Disadvantages
currently regulated contaminants and have been shown to be effective in removing unregulated emerging contaminants
permeate stream
to fouling
stream, which has elevated total dissolved solids prone to pipe scaling
removal capacity required because of 20-25% rejection rate
specifically power consumption
needed.
Cost Category ry Estimated Costs
Treatment Pla lant $22,673,000 Sitework $6,935,000 Work at t Remote Sites $657,000 Total Construction Cost Opinion $30,2 ,265,0 ,000 Pil ilot Study $75,000 Corr rrosion Control Study $180,000 Engineering $3,000,000 Administrative, Le Legal, , Bonding $50,000 Total Proje ject Cost $33,5 ,570,0 ,000
O&M Cost It Items Annual Cost
Ele lectrical Costs $96,000 Chemical Costs $63,000 Membrane Replacement $50,000 Additional Staffing $300,000 Annual O&M Costs $509,0 ,000
Ion Exchange removes hardness by adsorptio ion onto a resin in
in must be perio iodic icall lly regenerated wit ith brin ine solu lutio ion
ires ir iron removal l pretreatment
lend water wit ith ir iron pla lant dis ischarge to meet target hardness
Typical Ion Exchange System
Advantages Disadvantages
wastewater and sludge solids
passing through IX resin
used for regeneration
waste stream
water to WWTP may be undesirable
Cost Category ry Estimated Costs
Treatment Pla lant $14,837,000 Sitework $4,395,000 Work at t Remote Sites $657,000 Total Construction Cost Opinion $19,8 ,889,0 ,000 Pil ilot Study $75,000 Corr rrosion Control Study $180,000 Engineering $1,990,000 Administrative, Le Legal, , Bonding $50,000 Total Proje ject Cost $22,1 ,184,0 ,000
O&M Cost It Items Annual Cost
Ele lectrical Costs $50,000 Chemical Costs $213,000 Resin Replacement $20,000 Additional Staffing $225,000 Annual O&M Costs $508,0 ,000
ime softening removes hardness by chemic ical l precip ipitatio ion
iron, manganese, and radiu ium
ional l softenin ing treatment for munic icipal l appli licatio ions
Typical Lime Softening System
Advantages Disadvantages
for softening equipment and longer equipment life
stability with respect to corrosion control
treatment process
chemical precipitation
required to meet target hardness goal
can be messy and labor intensive
costs
more equipment, more analytical work, more process monitoring, sludge processing, and general housekeeping
Cost Category ry Estimated Costs
Treatment Pla lant $21,857,000 Sitework $4,293,000 Work at t Remote Sites $497,000 Total Construction Cost Opinion $26,6 ,647,0 ,000 Corr rrosion Control Study $180,000 Pla lant Engineering Costs ts $2,900,000 Administrative, Le Legal, , Bonding $50,000 Total Proje ject Cost $29,7 ,777,0 ,000
O&M Cost It Items Annual Cost
Ele lectrical Costs $74,000 Chemical Costs $209,000 Residuals Handling $54,000 Additional Staffing $300,000 Annual O&M Costs $637,0 ,000
Treatment Alt lternative Construction Cost Opinion Engin ineering & Studies Total l Project Cost Annual O&M Costs Ir Iron Removal $11,948,000 $1,505,000 $13,453,000 $104,900 RO Softenin ing $30,265,000 $3,305,000 $33,570,000 $509,000 IX IX Softenin ing $19,889,000 $2,295,000 $22,184,000 $508,000 Lim ime Softening $26,647,000 $3,130,000 $29,777,000 $637,000
ly Optio ions Study comple letio ion
lysis is
Incorporate comments from revie iew of draft studie ies and submit fin inal l reports