| 摘要 |
A conditioned alum-type water treatment residual is disclosed. A process for the conditioning of alum-type water treatment residual is likewise disclosed. The process includes dewatering the alum-type water treatment residual and conditioning by at least one method selected from the group consisting of conditioning by aging and physically turning periodically. A blended topsoil comprises conditioned alum-type water treatment residual and at least one topsoil component. A process for producing a blended topsoil with alum-type water treatment residual is disclosed. The alum-type water treatment residual is dewatered, conditioned by aging or turning periodically, and blended with topsoil components to produce a blended topsoil. The blended topsoil contains up to 50% alum-type water treatment residual by volume and preferably contains up to 30% alum-type water treatment residual by volume. The percentage of alum-type water treatment residual is dependent upon concentrations of metallic elements such as aluminum, copper, lead, zinc, and manganese, and the pH level of alum-type water treatment residual and the blended topsoil. A process for utilizing alum-type water treatment residual is also disclosed.
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