MIL-HDBK-1138
Table 11
Winter Problems with Solids Management
Problem
Solution
Unable to use solids drying
Cover beds.
beds in winter; beds freeze
Not able to apply solids to
Stockpile solids in winter
land in winter
months.
Aerobic digester freezes if
Cover tank.
blower is shut off to allow
Decant smaller amounts more
thickening by decanting
often.
Solids mixture freezes in tank
Run mechanical agitator
overnight.
Ice forms on digesters
Insulate better.
Icing in gravity thickener
Run final effluent to keep
hydraulic loading higher.
Solids holding tank freezes
Take offline during winter.
Solids freeze on truck
Use truck body heated with
exhaust gases.
Solids lines freeze; valves
Drain lines correctly.
freeze
Dismantle and thaw valve.
Put heat tape on lines.
Increase return rates.
Holding tanks too small to
Use spare clarifier of
last winter
oxidation ditch.
Extensive heat loss from
Improve insulation.
anaerobic digester
Operating temperature could
Cover pile and insulate.
not be reached in a new
Mix solids and wood chips with
compost pile
hot compost.
Blow hot exhaust from working
pile into new pile.
Source: Taken in part from U.S. Army CRREL Special Report 85-11.
67
Previous Page
