Mackinac Island WWTP Upgrades
Total Page:16
File Type:pdf, Size:1020Kb
John Barszewskli FTCH Operations . 3.8 Square miles, 890ft highest pt. Population year round 392, up to 15,000/day summer . Motorized vehicles banned since 1898 . M-185 – 8 miles in circumference, the only non - motorized state highway in the US . Mackinac Is State Park covers 80% of the island . 900 AD Native American Fishing camps . Tribal worships and chief burial grounds . Ojibwa, Algonquin, Iroquois, Huron, Chippewa . 1634 First European - Jean Nicolet . French-Canadian explorer . 1670 Several French missions established . St. Ignace . Mackinac (formerly known as Michillimackinac) . No WWTP By 1780 Fort Mackinac established British controlled post French /Indian war. 1815 Island given to the US by the British Forced by the Treaty of Ghent Established as a fur trading hub 1829 Mission Church Oldest surviving church building in Michigan 1875 Mack. Is. Becomes the 2nd National Park No WWTP 1887 Grand Hotel opened Commercial fishing replaces fur trading 1895 Feds give Island to Michigan 1st State park Fort was closed, motor vehicles prohibited (safety) No WWTP Mike Rowe “dirty jobs” Mack. bridge maintenance worker Horse manure/garbage removal/compost collection 1980 film “Somewhere in time” Ghost Hunters – Mission point resort 1969 -1971 sewer system built, WWTP established. 1991 landfill closed, going green Composting/recycling programs established . All paths lead uphill . Mobility and deliveries . Vehicle permits required . Police escort . Boat schedules . Seasonal limitations (mild winter 2013) . Upgrade planning crucial . Loads maximized . Onsite storage limited Started spring April 2012 Completed spring May of 2013 “before Mothers day” no cement trucks allowed after… 2 trucks per barge with only 2yds /truck. Quantity needed approx. 900 yds…do the math! No storage available at docks Generator and screw press arrived by flatbed Installed by two cranes in same day Winter average flow 0.1 MGD Winter operations (November – May) Winter headworks (interior screen & grit chamber) Bypass primary clarification and towers to aeration basins 1 & 2 Flow to 1 final clarifier (interior) Final covered 2nd clarifier on standby Chlorine contact to effluent force main. WAS stored to in ground basins or storage tank Plant design average summer flow – 0.9 MGD Summer operations Summer headworks 2 primary clarifiers 2 packed towers 2 additional aeration tanks (4 total) 3 additional final clarifiers (4 total) Chlorine contact to effluent force main Sludge storage and dewatering Ferric feed system Summer Headworks WesTech in line spiral screen Ultrasonic level control Vortex grit removal & washing Timer controlled sequences Organics removal Open air no ventilation required Reduced energy costs Upgraded internals to Primary and Final clarifiers (baffles, motors, scrapers, coatings) Covered Final clarifier (winter backup) Tower arm replacement RAS & WAS pump and controls Ferric Chloride pumps and storage New Generator from 250 to 400 KVA Upgraded lab –cabinets , fume hood, 1 beaker Chlorine gas system 150# cylinders Sludge dewatering screw press HEADBOX LEVEL VARIABLE VS CONSTANT CONTROL NEW AND OLD 5 CUBIC YDS Willie, Jay, & Ike Bike ride 1st step on site %*&#@$ !!! unexpected orientation Flows hit 1.1 MGD this WE Brand new jeans! MDEQ How is this possible? Sludge sample Last boat off the Island (reminder: the Tribal burial ground history?) BOD in = 140/500 + mg/l (landfill leachate) BOD out = < 10 mg/l T. Phosphorus in = 5 – 8 mg/l T. Phosphorus out = 0.5 mg/l Grit removal 10-15 gallons/day summer Sludge cake solids range 20 to *27.8% (* Barszewski analysis ) Estimated $20 k savings on sludge processing Thank You John Barszewski [email protected] 616.464.3754 www.ftch.com 616.575.3824 .