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Résultats 51-60 de 213
Storm and combined sewer pollution sources and abatement
1971
Vilaret, Manuel R.
Sludge material recovery system for manufacturers of pigmented papers
1971
Management of nutrients on agricultural land for improved water quality
1971
Zwerman, P. J.
Induced hypolimnion aeration for water quality improvement of power releases
1971
Leach, Lowell E.
Treatment of wastewater from the production of polyhydric organics
1971
Inorganic fertilizer and phosphate mining industries--water pollution and control
1971
The river basin model: chairman and council
1971
Closed system waste management for livestock
1971
Ngoddy, Patrick O.
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.
Afficher plus [+] Moins [-]Water pollution; disposal and reuse
1971
Zajic, J. E. (James E.)
