||Viral and bacterial levels resulting from the land application of digested sludge /
||Metropolitan Sanitary District of Greater Chicago (Ill.)
|| Health Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Available through the National Technical Information Service.
||PB 296 491
Sewage sludge digestion ;
Sewage--Environmental aspects ;
Sewage--Purification--Activated sludge process ;
Sewage disposal--Environmental aspects
Sewage treatment ;
Sludge disposal ;
Land reclamation ;
Surface waters ;
Ground water ;
Anaerobic processes ;
Sludge digestion ;
Coliform bacteria ;
Water wells ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||xii, 67 pages : illustrations ; 28 cm.
Surface and ground waters, sludge, soils and aerosols were sampled at a land reclamation site. The site has received large quantities of anaerobically digested sludge for several years. Samples were analyzed for viral and bacterial components to determine the impact of large scale sludge application on the environment. Sixty-eight water samples from streams, reservoirs, wells and runoff were processed for bacteria and viruses. Water samples upstream (S-1) and downstream (S-2) of the site show that the downstream site is lower in total coliform (TC) than the upstream site, while there are no differences in fecal coliform (FC) or fecal streptococcus (FS) levels. Water samples from Reservoir 3 which drains approximately 5,000 acres of land to which sludge has been applied indicate TC levels higher than those in a control reservoir which drains untreated land, with no differences between FC and FS. Six samples contained virus which were confirmed by subpassage. Three of these were found to be contaminated and contained poliovirus 1.
Contract no. 68-02-2223. Includes bibliographical references.