Recycling of calcium-silicate material after wastewater filtration to agriculture -Soil condition impact

QC 20120827
Reactive filter materials aimed at phosphorus (P) recovery is a novel method for on-site wastewater treatment. Once the bed filter is no longer effective, the sorbent must be replaced and can then be recycled as a soil amendment to agriculture. This study investigated the short-term effects of such amendments in a field with a wheat crop in order to evaluate the risks and/or potential benefits of this disposal option. The developed product Polonite (manufactured from Opoka) was used as a model filter sorbent in the field trial. Rates corresponding to approximately 6 and 8 tons per hectare were applied. In the short-term, this amending did not affect soil physical and sorption properties. The rate of Polonite used here, as P source for wheat was irrelevant in this kind of soil. The usefulness of this disposal option of exhausted filter material is discussed.

Ingår i:Ecological Chemistry and Engineering S: Walter de Gruyter GmbH19:3, s. 373-3821898-6196

Av författaren/redakt...: Cucarella, Victo ...; Renman, Gunno; Zaleski, T.; Mazurek, R.

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