Water treatment residuals (WTR) and biosolids are by-products from municipal treatment processes. Both products have been studied separately for their benefits on land application as an alternative method of beneficial reuse. WTR land application concern is the amorphous metal oxides adsorbing tremendous P amounts, thus significantly reducing plant-available P via surface adsorption. A supplemental P source, such as biosolids, should negate the adsorptive effects. Co-application effects in terms of P fractionation have not been studied.
The objectives of the project were to understand...