Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Optimization and design of an oil activated sludge concentration process /
Author Rosenblatt, T. M.,
Other Authors
Author Title of a Work
Smith, J.E.
CORP Author Esso Research and Engineering Co., Linden, N.J.
Publisher Office of Research and Development, U.S. Environmental Protection Agency, For sale by the Supt. of Docs., U.S. G.P.O.
Year Published 1974
Report Number EPA-670/2-74-004; EPA-68-01-0095; EPA-17070-HDA; W74-10192
Stock Number PB-234 173
OCLC Number 01128471
Subjects Sewage--Purification--Activated sludge process.
Additional Subjects Sludge disposal ; Sewage treatment ; Solid waste disposal ; Dewatering ; Incinerators ; Combustion ; Drying ; Pilot plants ; Cost estimates ; Thickening
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 670-2-74-004 Headquarters Library/Washington,DC 11/20/2012
EJBD  EPA 670-2-74-004 c.1 Headquarters Library/Washington,DC 05/17/2013
ELBD RPS EPA 670-2-74-004 repository copy AWBERC Library/Cincinnati,OH 08/19/2019
NTIS  PB-234 173 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 1 volume (various pagings) : illustrations ; 27 cm.
Laboratory and pilot plant studies are described for a new Esso-Carver Greenfield process for the disposal of sewage sludge. An oil-assisted gravity separation of the majority of the water while heating is followed by multiple effect evaporation to dryness in an oil slurry, and incineration of the dry solids. Agreement between laboratory and pilot plant results was good, indicating no scale-up problems. In the gravity separation, secondary sludges are concentrated from about 0.5% up to 5-10% solids. Solids capture of 98% or more is achieved by high shear oil-sludge contacting. Temperature dependent losses of solubilized organic carbon up to about 25% of the organic content of the feed are observed in the separated water from the oil concentration, and in the distillate from the evaporators. The process economics show an advantage of $13-32 a ton compared to the best known commercial technology: total costs are estimated at $21-39/ton of dry solids for a 189 ton/day plant processing a 50/50 mixture of primary + activated sludges to ash. A lower temperature gravity separation step could greatly reduce the economic penalty for a 25% recycle of solubilized secondary sludge.
"EPA-670/2-74-004." "February 1974." Report prepared by Esso Research & Engineering Company, Linden, New Jersey.