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AWWA ACE91090
- Impacts of Land Application of Alum Sludge on the Growth of Tall Fescue and Loblolly Pines
- Conference Proceeding by American Water Works Association, 01/01/1991
- Publisher: AWWA
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This paper reports on an investigation into the possible effects of land application of alum sludges on plant growth. The growth of fescue and loblolly pine seedlings was studied to determine proper alum sludge loadings and to evaluate an potentially harmful effects. Also, a soil column leachate study was initiated to evaluate the potential groundwater effects of land applied sludges. The study utilized soil columns which received various alum sludge loadings to evaluate the leachate characteristics resulting from application of simulated rainfall. The greenhouse study found that the reduction in plant available phosphorus is the largest drawback to land application. This effect can be overcome through proper crop selection of the addition of fertilizers. The column study data suggest that groundwater contamination is not likely as a result of land application at a 4 percent loading rate.
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