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Research & Development


The use of coal ash to improve properties of agricultural soils – first year summary, 2006

Shai Bar-Tal under the guidance of Prof. Uri Mingelgrin from the Institute of Soils, Water and Environmental Sciences, The Agricultural Research Organization, Volcani Center, studied the use of coal ash to improve properties of agricultural soils. This study explored the potential of the ash for: increasing water retention of sandy soils; preventing the formation of surface crust that reduces water infiltration rate in Loessial soils; and reducing cracking in sodic soils. The findings of the study are now being verified at various sites around the country.
See abstract: The use of coal ash to improve properties of agricultural soils

Stabilization of urban sewage sludge with coal ash and lime for use in agriculture – first year of research – 2006

Dr. Pinchas Fine and others from the Soil, Water and Environmental Sciences Institute, Agricultural Research Organization, Volcani Research Center carried out a study: In the context of preparing the Shafdan Water Reclamation Plant to treat sewage sludge, they are examining an alternative involving lime-stabilized sludge using N-Viro technologies, which together with suitable additives, removes pathogens from the sludge, enabling it to be used as fertilizer for Grade A agriculture (crops edible for human consumption). Sludge preparations stabilized in lime were made from sludges taken from Beit Shemesh or Ashdod, mixed with quicklime or CKD, using fly ash or clay as fillers. All the mixtures met the Israeli standard for heavy metals and the demands of Grade A sludge. Three field experiments (with wheat, potatoes, irrigated crops) involving lime-stabilized sludge on a coal-ash base are currently being carried out.

See abstract: Stabilization of urban sewage sludge with coal ash and lime for use in agriculture

A paper submitted to AshTech2006 Conference, Birmingham, UK – 05/2006

The article presents the coal ash utilization development process in Israel and focuses on uses in the construction sector and on the Israeli fly ash quality in that context. The article refers also to unique Israeli bottom ash uses in agriculture.