Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Removal of nitrate by an algal system. /
Author Brow, Randall L.
Other Authors
Author Title of a Work
Brown, Randall L.
CORP Author California. Department of Water Resources.
Publisher For sale by the Supt. of Docs., U.S. G.P.O., Washington,
Year Published 1971
Report Number DWR-174-10; EPA-WQO-14-06-200-3389A; EPA-WQO-13030-ELY; 02975,; 13030-ELY-4/71-7
Stock Number PB-205 425
OCLC Number 54472978
Subjects Water--Purification--Biological treatment. ; Algae. ; Nitrates. ; Water--Purification--Nitrogen removal.
Additional Subjects ( Chemical removal(Sewage treatment) ; Nitrates) ; ( Algae ; Harvesting) ; ( Food processing ; Algae) ; Food ; Ground water ; Water pollution ; Nutrients ; Cost estimates ; Lagoons(Ponds) ; Feeding stuffs ; Water pollution control ; High protein supplements ; Food supplements ; San Joaquin Valley
Library Call Number Additional Info Location Last
EMBD MF PB-205 425 NRMRL/GWERD Library/Ada,OK 06/18/2004
NTIS  PB-205 425 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation xii, 132 pages : illustrations ; 28 cm.
An algal system consisting of algae growth, harvesting and disposal was evaluated as a possible means of removing nitrate-nitrogen from subsurface agricultural drainage in the San Joaquin Valley of California. The study of this assimilatory nitrogen removal process was initiated to determine optimum conditions for growth of the algal biomass, seasonal variations in assimilation rates, and methods of harvesting and disposal of the algal product. A secondary objective of the study was to obtain preliminary cost estimates and process design. The growth studies showed that about 75 to 90 percent of the 20 mg/l influent nitrogen was assimilated by shallow (12-inch culture depth) algal cultures receiving 2 to 3 mg/l additional iron and phosphorus and a mixture of 5 percent CO2. The most economical and effective algal harvesting system tested was flocculation and sedimentation followed by filtration of the sediment. The market value for this product as a protein supplement was estimated to be about $80 to $100 per ton.
"13030ELY4/71-7." "REC-R2-71-7." "DWR no. 174-10." DWR-USBR contract no. 14-06-200-3389A. Includes bibliographical references (pages 126-130). Microfiche.