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EFFECTS OF AGING ON LEACHATE CHARACTERISTICS OF ALKALINE STABILIZED BIOSOLIDS

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Biosolids are often marketed and sold to the general public as commercial fertilizers, soil conditioners, and landfill cover. N-Viro Soil™ (NVS) is one of the products produced from advanced alkaline stabilized municipal biosolids. (Burnham et al. 1992). In the N-Viro process, dewatered biosolids (either a raw-primary, digested, or activated biosolids) are mixed with alkaline reagents. The solids content of the dewatered biosolids ranges from 15–40 % (Logan and Burnham, 1995), and a number of industrial by-products, such as cement kiln dust (CKD), lime kiln dust (LKD), lime (CaO), flue gas desulfurization (FGD) byproducts, wood ash, and many types of coal ashes can be used as alkaline reagents. These reagents are used alone or in combination. The stabilization process is based on reactions of the type:

CaO+H2O=Ca(OH)2ΔH=65.23kJ/mol
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Document Type: Research Article

Publication date: 2000-01-01

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