Fixation of ammonium-N and nitrate-N with olive oil mill wastewaters.
The present work evaluates whether ammonium and nitrate ions become linked with diluted olive oil mill wastewaters (OOMW). From a laboratory experiment it was concluded that the ammonium ion linked with OOMW in the presence of carbonates or hydroxides and OOMW could block up to a third of the present ammonium-N ion. On the other hand, OOMW are capable of joining with the nitrate ion, in a sulphuric diluted medium at room temperature, retaining up to 80% of nitrate-N. These complexes could be useful for recycling OOMW as new OOMW-N fertilizers. In soils treated with OOMW-N fertilizers, the nitrate-N emissions were reduced by 90% for two months. So, inorganic-N fertilizers mixed with OOMW could produce new organic fertilizers with a higher efficiency index for N.
Jiménez Aguilar
Manuel
M
Instituto de Investigación y Formación Agraria y Pesquera, Consejería de Agricultura y Pesca, Junta de Andalucía, Camino de Purchil s/n. P.O. Box 2027, 18080 Granada, Spain. manuel.jimenez.aguilar@juntadeandalucia.es
D000383:Agriculture; D007220:Industrial Waste / Q000032:analysis*; D009566:Nitrates / Q000737:chemistry*; D009586:Nitrogen Fixation; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013030:Spain; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D007220:Industrial Waste; D009566:Nitrates; D000069463:Olive Oil; D010938:Plant Oils; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical