Chemtrade Logistics Inc.

Chemtrade Logistics Inc.
Formerly General Chemical Corporation:
• Has operated an alum (aluminum sulfate) manufacturing
plant in Menasha since the 1950s.
• Alum is a non-toxic water treatment chemical commonly
used in the paper- and municipal-wastewater treatment
industries.
• Manufacturing process produced a sludge by-product.
• The sludge was disposed as a non-hazardous waste in a
State-permitted landfill located off Larsen Road, just west
of Oakridge.
Chemtrade Alum Landfill
Larsen Road
Neenah, Wisonsin
Elevation: 830 feet amsl
Neenah, WI
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Winnebago County, WI
MD&E
FIGURE 1 – SITE LOCATION
®
Civil & Environmental Engineering
By: TJM
Date: 2/14/14
Scale:
1 Mile
Cell 1
Cell 2
Cell 3
Landfill Closure
• Landfill is no longer used for disposal.
• Cell is full of sludge and wastewater.
• Chemtrade entered into a voluntary agreement with
the WDNR to close the landfill per WNDR rules.
• Closure planning process was initiated in 2012.
• Site has been monitored regularly for over 30 years.
Closure Process
• Remove and treat the wastewater.
• Regrade the sludge.
• Contour and cover with clay-rich topsoil
pursuant to WI codes/permit.
Characteristics of Wastewater
• Acidic (pH = 2 - 3.5 s.u.), equivalent to lemon
juice or vinegar.
• Elevated levels of sulfate and aluminum, the
ingredients of Alum.
Wastewater Treatment Strategy
• Remove sulfate by raising pH to ~12.5:
1. Gypsum (calcium sulfate) precipitation
2. Ettringite mineral precipitation
• Remove aluminum by lowering pH back to ~7.0
through carbonation.
• Gypsum, ettringite and aluminum hydroxide
solids will be disposed in the open landfill cell.
• Treated water will meet drinking water standards
and will be released to a local surface drain.
Wastewater Treatment Summary
• Stage 1 - Supernatant Extraction and Storage
• Stage 2 - Gypsum Precipitation (Hyd. Lime)
• Stage 3 - Ettringite Precipitation (Ca-aluminates)
• Stage 4 - Carbonation (CO2 bubbling)
• Stage 5 - Solids Filtration
• Stage 6 - Sludge Disposal
• Stage 7 – Discharge of Treated Water
Discharge of Treated Water
• Convey treated water at 15 gallons per minute
to surface swale at the south perimeter of
Larsen Road.
• Swale drains to a wetland complex at the
intersection of Larsen and Oakridge.
• Wetlands empty into the Green Valley Ditch
and eventually to Little Lake Butte des Morts.
• WDNR discharge permits require testing to
routinely verify water quality.
Temporary Treatment
Complex housed within
Clear-Span building
MD&E
®
Civil & Environmental Engineering
Mayotte Design & Engineering, PC
1130 Hitching Post Road
East Lansing, Michigan 48823
(517) 367-2674
www.mayottedesign.com
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Notes:
Aerial photography by Google Earth
Site Name/Address:
Chemtrade Solutions
Menasha Works
Alum Landfill
Town of Neenah, Wisconsin
Scale:
¼-Mile
Date:
5/20/16
Drawn By:
TJM
GREEN VALLEY
DRAIN
15 gallons per minute
flow =
approximately 1 inch
of water in channel