Improved Production of Magnesium Ammonium Phosphate (Struvite) from Landfill Leachate 2014 Final Report Dr. Jacob Prater, College of Natural Resources University of Wisconsin-Stevens Point UNIVERSITY OF WISCONSIN SYSTEM SOLID WASTE RESEARCH PROGRAM
نویسنده
چکیده
Struvite precipitation proved to be an effective method of ammonia removal from the landfill leachate from two separate sources. Batch tests for precipitating struvite yielded several different chemical combinations that were effective at removing ammonia from leachate. The struvite precipitate samples were quite heterogeneous in composition, containing a mixture of short and thick crystals, elongated rectangular crystals, and spherical needle-like crystals and elemental analysis indicated that there were other minerals present (Struvite was identified using X-ray diffraction). Precipitates from landfill leachate resulted in larger plants (Kale and Corn) and greater plant yield than controls, but they underperformed commercial fertilizer. When the economics of a struvite precipitating pretreatment are analyzed, it seems that employing such a process is not currently justifiable. The current prices paid for conventional fertilizers are hundreds of times less than the price needed to break even on struvite production making struvite pretreatment for landfill leachate a non-viable option at present.
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