خيارات البحث
النتائج 31 - 40 من 213
Estuarine modeling: an assessment
1971
Ward, George H. | Espey, William H.
Inorganic fertilizer and phosphate mining industries--water pollution and control
1971
Ground water pollution in Arizona, California, Nevada and Utah
1971
Fuhriman, Dean K. | Barton, James R.
Design guides for biological wastewater treatment processes
1971
The river basin model: economic sector
1971
Biology and water pollution control
1971
Warren, Charles E. | Doudoroff, Peter
Engineering methodology for river and stream reaeration
1971
Murro, Ronald P. | Yeaple, Donald S.
The un-politics of air pollution
1971
Crenson, Matthew A.
Artworks form the colleciton of the Australian War Memorial relating to the Royal Australian Air Force.
اظهر المزيد [+] اقل [-]Phosphorus removal by ferrous iron and lime
1971
Alvord, E. Thomas
Spent pickle liquor, as a source of ferric ion, was added to primary treatment facilities and found to be effective in removing more than 60% of the phosphorus contained in the sewage. When advanced means for more complete removal of the insolubilized phosphates are available, removals in excess of 90% are indicated. In addition, overall suspended solids removals averaged 61.5% and BOD and COD removals averaged 61.6 and 55.3 percent during a 23 month test period. Required iron dosage ranged from the theoretical minimum of 2.7 to a maximum of approximately 3.1 weights of ferrous iron per weight of phosphorus. The weight increase in sludge solids due to chemical precipitation of phosphorus was 100 lbs/million gallons/mg/liter of phosphorus in the influent. Total costs for treating a raw sewage containing 13 mg/l phosphorus are given.
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