Upload
helen
View
36
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Wastewater Treatment & Collection System Improvements. Treatment Plant Improvements Replace aged infrastructure Increase hydraulic and organic capacity Provide new technology to address facility compliance challenges - PowerPoint PPT Presentation
Citation preview
Wastewater Treatment & Collection System Improvements
Treatment Plant Improvements• Replace aged infrastructure• Increase hydraulic and organic capacity • Provide new technology to address facility compliance
challenges• Provide ability to divert, hold and return influent flow
during high flow events (precipitation, snow melt, etc.)• Convert the WWTP from a seasonal discharger to a
continuous discharge
Summary of Improvements• New head works (screening/grit removal)• Conversion of Lagoon #4 to excess flow basin• Install new septage receiving station• Install new Oxidation Ditch & refurbish existing Oxidation Ditch• Provide two new final clarifiers• Provide new ultraviolet disinfection system for plant discharge• New final effluent cascade aeration• New plant electrical system including new standby generator
Construction StatusEstimated date of substantial completion – January 1, 2015
• Difficult winter construction period
• Due to increased efforts this spring – back on estimated schedule
• Challenging site access conditions (thank you to our neighbors)
Construction Progress•Electrical bank•New Oxidation Ditch•Two new clarifiers•Septage receiving building
Pictures
WWTP Entrance Road
Existing Oxidation Ditch – left foreground
New Oxidation Ditch – Right foreground
Two New Final Clarifiers - Background
New Oxidation Ditch – reinforcement steel
New Oxidation Ditch
North Final Clarifier
Electrical Equipment
Interim Operations PlanPeriod: June1 – August 31• Both Oxidation Ditches – out of service (constructability)•WWTP will store influent in 3 existing lagoons• September 1 – existing oxidation ditch will return to service,
resume active treatment of influent flow to plant• As influent flow volumes allow – redirect stored influent
wastewater back through active oxidation ditch process
Interim Ops Plan
Pro’s• Takes place during normal no
discharge period• Expedites construction• Most efficient method of facility
completion• Best available treatment season
for lagoon activity• Working with non-domestic users
to minimize discharge to WWTP
Con’s• No mechanical facility
treatment• Odor generating potential• Storage volume availability• Extended period to treat
accumulated influent
Collection System Improvements
•New main pump station (PS #16) – replaces PS #6•Replace PS #4 with new PS #4• Sewer rehabilitation
New PS #16
New PS #16
New PS #4
New PS #4
Sewer Rehab Work
Wastewater Treatment & Collection System Improvements
Questions/Comments