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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.
Show more [+] Less [-]Wastewater ammonia removal by ion exchange
1971
Water and water pollution handbook
1971-1973
Ciaccio, Leonard L.
Eutrophication of surface waters--Lake Tahoe
1971 | 1972
Waste treatment lagoons--state of the art
1971
McKinney, Ross E. | Dornbush, James N. | Vennes, John Wesley
Management of nutrients on agricultural land for improved water quality
1971
Zwerman, P. J.
Wastewater demineralization by ion exchange
1971
Kreusch, Ed | Schmidt, Kenneth D. (Kenneth Dale)
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.
Show more [+] Less [-]Pollution and conservation in Australia
1971
Martin, Angus A.
The river basin model: social sector | Basin model: social sector
1971
The River Basin Model is not primarily a water management model. Through human interaction and computer simulation, it represents the entire complex economic, social, and governmental activities taking place within a specified local system. The manual contains the basic information and description of the model required by the social sector. It is assumed that the Model Overview and the Scenario descriptions have been read prior to the receipt of this manual. Once the players comprising the Social Sector have become familiar with the model in general, the particular city being represented, and the workings of the local economic, social, and government system they will be able to bring their own imagination and initiative to bear on the operation of the Social Sector and the population groups they represent.
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