Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Stabilization of sewage sludge by two-phase anaerobic digestion /
Author Ghosh, S. ; Henry, M. P. ; Sajjad, A.
Other Authors
Author Title of a Work
Henry, M. P.
Sajjad, A.
CORP Author Institute of Gas Technology, Chicago, IL.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Publisher U.S. Environmental Protection Agency, Water Engineering Research Laboratory,
Year Published 1987
Report Number EPA/600/2-87/040
Stock Number PB87-197398
Subjects Sewage sludge. ; Sewage--Environmental aspects. ; Sewage sludge digestion.
Additional Subjects Sludge digestion ; Anaerobic processes ; Waste treatment ; Digestion(Decomposition) ; Enzymes ; Sewage treatment ; Two phase digestion
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB87-197398 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 352 pages : illustrations ; 28 cm
The research described in the report was concerned with evaluation of alternative approaches to anaerobic digestion, a process commonly used on the residual stream from wastewater treatment. The principal approach studied was that of separating the acid- and methane-forming phases by using two digestion vessels rather than one. The effects of varying temperature and other operating parameters, and of adding enzymes to the process, were also investigated. For continuous-flow, continuously stirred tank reactors, the two-phase process performed better than single-stage digestion for all operating conditions. Novel upflow digesters having high solids retention were also evaluated and offered further improvements. The enzyme additions also enhanced two-phase digestion.
"May 1987." "EPA/600/2-87/094." Microfiche.