alexa Reuse of microbially treated olive mill wastewater as fertiliser for wheat (Triticum durum Desf.).
Chemical Engineering

Chemical Engineering

Journal of Bioprocessing & Biotechniques

Author(s): Fausto Cereti C, Rossini F, Federici F, Quaratino D, Vassilev N,

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Abstract Free cells of Aspergillus niger were grown on olive mill wastewater (OMW) supplemented with rock phosphate (RP) in an air-lift bioreactor in batch and repeated-batch processes. The fungus grew well and reduced the chemical oxygen demand of the waste by 35\% and 64\% in the batch and repeated-batch (fourth batch) processes, respectively. Total sugar content was consistently reduced (ca. 60\%) in both processes while reduction of total phenols was minimal. RP was solubilised and maximum soluble P was 0.63 and 0.75 gl(-1) in the batch and repeated-batch (third batch), respectively. Several types of OMW+/-RP, microbially-treated or not, were tested in a greenhouse for their fertilising ability on a soil-wheat (Triticum durum Desf.) model system. Beneficial effects were highest using OMW treated by the repeated-batch process. The treated plants showed an increase in seed biomass, spike number, and kernel weight. Harvest index was highest (0.49+/-0.04) after treatment with OMW from the repeated-batch process.
This article was published in Bioresour Technol and referenced in Journal of Bioprocessing & Biotechniques

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