Accession Number : ADA117848

Title :   Evaluation of a Simple Model for Predicting Phosphorus Removal by Soils during Land Treatment of Wastewater.

Descriptive Note : Special rept.,


Personal Author(s) : Ryden,J C ; Syers,J K ; Iskandar,I K

PDF Url : ADA117848

Report Date : Jun 1982

Pagination or Media Count : 16

Abstract : This report evaluates a simple P balance model to predict site longevity with respect to P removal during land treatment of wastewater. The model is based on measured inputs and outputs of P at the treatment site and on an estimate of the P storage capacity of the soil profile. Sorption of P by three soils used for land treatment conformed to the P sorption model based on a generalized isotherm. Laboratory sorption tests were used to predict P storage capacity of the soil profiles at a solution P concentration equivalent to that in the effluent applied to the soil. For two soil profiles the P balance model predicted site longevities of approximately 50 to 210 years. The existing depth of P enrichment in these profiles predicted from the model agreed closely with measurements of P enrichment based on amounts of NaOH-extractable P and on measured soil solution P concentrations. (Author)

Descriptors :   *Sewage treatment, *Phosphorus, Water flow, Land areas, Soils, Absorption, Removal, Effluents, Mathematical prediction, Mathematical models

Subject Categories : Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE