Phenolic removal in olive oil mill wastewater using loofah-immobilized Phanerochaete chrysosporium

Abstract

Olive oil mill wastewater (OMW) has a high organic load, and this is a serious concern of the olive industry. Conventional biological wastewater treatments, despite their simplicity and suitable performance are ineffective for OMW treatment since phenolics possess antimicrobial activity. In order to carry out a proper treatment of OMW, use of a microorganism able to degrade the phenolics is thus necessary. In this study the ability of Phanerochaete chrysosporium to degrade the phenolic compounds of OMW and to decrease the chemical oxygen demand (COD) using cells immobilized on loofah was examined. The basal mineral salt solution along with glucose, ammonium sulfate and yeast extract was used to dilute the OMW appropriately. The fungus did not grow on the concentrated OMW. The extent of removal in this bio-treatment, of total phenols (TP) and the COD were 90 and 50%, respectively, while the color and aromaticity decreased by 60 and 95%, respectively. The kinetic behavior of the loofah-immobilized fungus was found to follow the Monod equation. The maximum growth rate l max was 0.045 h )1 while the Monod constant based on the consumed TP and COD were (mg/l) 370 and 6900, respectively.

Feasibility study of organic matter and Ammonium removal using loofa sponge as a supporting medium in an aerated submerged fixed-film reactor (ASFFR)

“…For example, in the study by Iqbal and Edyvean (2004) the maximum time of exposure was 240 min which may not be enough time for deformation and decay of loofa sponges to take place. As previously noted, phenolic compounds were successfully removed from olive oil mill wastewater using loofa-immobilized P. chrysosporium, and the extent of removal of TP and COD were reported to be 90% and 50%, respectively (Ahmadi et al 2006). However, this study did not review the changes in the loofa medium in the long term which could affect the performance of the system in full-scale applications.…”

“…studied the production of fungal biomass immobilized on loofa sponge for the removal of heavy metal ions and chlorinated compounds from aqueous solution. In another study, removal of phenolic compounds in olive oil mill wastewater using loofa-immobilized Phanerochaete chrysosporium was successfully carried out and the extent of removal of total phenols (TP) and COD was reported to be 90% and 50%, respectively (Ahmadi et al 2006). Recently, treatment of gaseous emissions contaminated with H2S by biofilters inoculated with single cultures of sulfur oxidizer bacteria was experienced (Aroca et al 2007).…”

Evaluation of olive oil mill wastewater toxicity on the mitochondrial bioenergetics after treatment with Candida oleophila

“…Many works concerning OMW biodegradation can be found in the literature (Ahmadi et al, 2006;Di Gioia et al, 2001;Jaouani et al, 2005;Lanciotti et al, 2005), and although some perform toxicological evaluations of OMW after treatment (Dhouib et al, 2006;El Asli et al, 2005;Fiorentino et al, 2004;Isidori et al, 2005), these toxicological tests evaluate mainly the effects on seed germination.…”

In-depth Analysis of the Structure and Properties of Two-variety Natural Luffa Sponge Fibers

“…The luffa sponge has been used as cleaning equipment (for instance, as a dish cloth), insole materials, and pillow filling materials. The advancement in science and technology has led to luffa sponges being widely used in several fields such as pharmaceutical engineering [7,8], environmental engineering [9][10][11], biotechnology [12][13][14], and industrial products [15][16][17]. Since, luffa sponges are porous material with a high degree of lignification [18][19][20], they have a great potential for application in composite materials and fabric fibers.…”