||Engineering assessment of vermicomposting municipal wastewater sludges /
Donovan, John F.
||Camp, Dresser and McKee, Inc., Boston, MA.;Municipal Environmental Research Lab., Cincinnati, OH.
|| U.S. Environmental Protection Agency, Municipal Environmental Research Laboratory,
Sewage sludge. ;
Sewage--Purification--Biological treatment. ;
Sludge disposal ;
Sludge digestion ;
Activated sludge process ;
Cost estimates ;
Life cycles ;
Performance evaluation ;
Market value ;
Public health ;
Cost comparison ;
Earth worms ;
Land application ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||88 pages ; 28 cm
Vermicomposting -- the biological degradation of organic matter that occurs as earthworms feed on waste materials -- has been advocated by some as a means of stabilizing and disposing of municipal wastewater sludges. Vermicomposting is being attempted on an experimental scale, the process has been found to be feasible and potentially competitive economically with conventional sludge-stabilization techniques such as landspreading of liquid sludge and static-pile composting. Only vermicomposting of liquid primary and waste activated sludges appears competitive at present stages of development. Costs developed for the vermicomposting of liquid sludges in protected facilities are estimated at $105 to $235 per ton. The question of whether vermicomposting is the equivalent of conventional processes in stabilizing sludge and reducing pathogens in it remains to be answered at demonstration scale.
Caption title. "May 1981." "EPA-600/2-81-075." Microfiche.