Olive-mill wastes represent a significant environmental problem in Mediterranean areas due to their significant production during a short period of time. Their high polyphenol, lipid and organic acid concentrations make them phytotoxic wastes. Composting is one of the technologies used for the valorization of those wastes, producing a fertilizer useful for poor soils. The present study is an attempt to elaborate upon organic matter transformations and define the parameters for product maturity by adapting chemical and spectroscopic methods during composting. The aim of this work was to study the changes involved in the composting process of four piles during 200 days, and follow up the maturity of the final product during composting. Fourier transform infrared (FTIR) spectroscopy has been proven to be an appropriate analytical method for the qualitative assessment of compost stability. FTIR spectroscopy results revealed enrichment in aromatic structures and a degradation of the aliphatic and alcoholic structures indicating stabilization of the final compost. The results showed that stability of the final product was reached after 7 months of composting. The phytotoxic effects of olive mill wastes and animal manures was assessed by germination index. Indeed, the germination indices of piles 1, 2, 3 and 4 reached 131.31%, 72%, 90.56%, and 105.37%, respectively, at the end of the process. This demonstrated the absence of phytotoxicity in the majority of mature composts.
Ait Baddi, G., Alburquerque, J.A., Gonzalvez, J., Cegarra, J. & Hafidi, M. ( 2004a) Chemical and spectroscopic analyses of organic matter transformations during composting of olive mill wastes. International Biodeterioration and Biodegradation, 54, 39-44.
2.
Ait Baddi, G., Cegarra, J., Merlina, G., Revel, J.C. & Hafidi, M.(2009) Qualitative and quantitative evolution of polyphenolic compounds during composting of an olive-mill waste-wheat straw mixture. Journal of Hazardous Materials, 165, 1119-1123.
3.
Ait Baddi, G., Hafidi, M., Cegarra, J. et al. (2004b) Characterization of fulvic acids by elemental and spectroscopic (FTIR and 13C-NMR) analyses during composting of olive mill wastes plus straw. Bioresource Technology, 93, 285-290.
4.
Alburquerque, J.A., Gonzalvez, J., Garcia, D. & Cegarra, J. ( 2006) Measuring detoxification and maturity in compost made from ‘alperujo’, the solid by-product of extracting olive oil by the two-phase centrifugation system. Chemosphere, 64, 470-477.
5.
Amir, S., Hafidi, M., Merlina, G., Hamdi, H. & Revel, J.C. ( 2005a) Fate of polycyclic aromatic hydrocarbons during composting of lagooning sewage sludge. Chemosphere, 58, 449-458.
6.
Amir, S., Hafidi, M., Merlina, G. & Revel, J.C. ( 2005b) Sequential extraction of heavy metals during composting of sewage sludge. Chemosphere, 59, 801-810.
7.
Amir, S., Hafidi, M., Lemee, L. et al. (2006) Structural characterization of humic acids, extracted from sewage sludge during composting, by thermochemolysis-gas chromatography-mass spectrometry. Process Biochemistry, 41, 410-422.
8.
Aparna, C., Saritha, P., Himabindu, V. & Anjaneyulu, Y. ( 2008) Techniques for the evaluation of maturity for composts of industrially contaminated lake sediments. Waste Management , 28, 1773-1784.
9.
Benito, M., Masaguer, A., Moliner, A., Arrigo, N. & Palma, R.S. ( 2003) Chemical and microbiological parameters for the characterization of the stabilizing and maturing of pruning waste compost. Biology and Fertility of Soils, 37, 184-189.
10.
Bernal, M.P., Paredes, C., Sanchez-Monedero, M.A. & Cegarra, J. ( 1998) Maturity and stability parameters of composts prepared with a wide range of organic wastes. Bioresource Technology , 63, 91-99.
11.
Bertran, E., Sort, X., Soliva, M. & Trillas, I. ( 2004) Composting winery waste: sludges and grape stalks. Bioresource Technology, 95, 203-208.
12.
Brewer, L.J. & Sullivan, D.M. ( 2003) Maturity and stability evaluation of composted yard trimmings . Compost Science and Utilization, 11, 96-112.
13.
Chapman, S.J., Campbell, C.D., Fraser, A.R. & Puri, G. ( 2001) FTIR spectroscopy of peat in bordering Scots pine woodland: relationship with chemical and biological properties. Soil Biology and Biochemistry, 33, 1193-1200.
14.
Chikae, M., Ikeda, R., Kerman, K., Morita, Y. & Tamiya, E. ( 2006) Estimation of maturity of compost from food wastes and agro-residues by multiple regression analysis. Bioresource Technology, 97, 1979- 1985.
15.
Cooperband, L.R., Stone, A.G., Fryda, M.R. & Ravet, J.L. ( 2003) Relating compost measures of stability and maturity to plant growth. Compost Science and Utilization, 11, 113-124.
16.
Crohn, D.M. ( 1996) Planning biosolids land application rates for agricultural systems. Journal of Environmental Engineering, 122, 1058-1066.
17.
Droussi, Z., D’orazio, V., Provenzano, M.R., Hafidi, M. & Ouatmane, A. ( 2009) Study of the biodegradation and transformation of olive-mill residues during composting using FTIR spectroscopy and differential scanning calorimetry. Journal of Hazardous Materials, 164, 1281-1285.
18.
Ellerbrock, R.H., Gerke, H.H., Bachmann, J. & Goebel, M.O. ( 2005) Composition of organic matter fractions for explaining wettability of three forest soils. Soil Science Society of America Journal, 69, 57-66.
19.
Fukushima, M., Yamamoto, K., Ootsuka, K. et al. (2009) Effects of the maturity of wood-waste compost on the structural features of humic acids. Bioresource Technology, 100, 791-797.
20.
Gigliotti, G., Guisquiani, P.L. & Businelli, D. ( 2001) A long chain and infrared spectroscopy study on a soil amended with municipal sludge. Agronomie, 21, 169-178.
21.
Haberhauer, G., Rafferty, B., Strebl, F., Gerzabek, M.H. ( 1998) Comparison of the composition of forest soil litter derived from three different sites at various decompositional stages using FTIR spectroscopy . Geoderma, 83, 331-342.
22.
Hachicha, S., Sellami, F., Cegarra, J. et al. (2009) Biological activity during co-composting of sludge issued from the olive-mill waste-water evaporation ponds with poultry manure - physico-chemical characterization of the processed organic matter. Journal of Hazardous Materials, 162, 402-409.
23.
Hirai, M.F., Chanyasak, V. & Kubota, H. ( 1983) A standard measurement for compost maturity. Biocycle, 24, 54-56.
24.
Jouraiphy, A., Amir, S., El Gharous, M., Revel, J.C. & Hafidi, M. ( 2005) Chemical and spectroscopic analysis of organic matter transformation during composting of sewage sludge and green plant waste. International Biodeterioration and Biodegradation, 56, 101-108.
25.
Komilis, D.P., Karatzas, E. & Halvadakis, C.P. ( 2005) The effect of olive mill wastewater on seed germination after various pretreatment techniques. Journal of Environmental Management, 74, 339-348.
26.
Ma, Y., Zhang, J.Y. & Wong, M.H. ( 2003) Microbial activity during composting of anthracene-contaminated soil. Chemosphere, 52, 1505- 1513.
27.
Madari, B.E., Reeves, J.B., Machado, P.L.O.A., Guimaraes, C.M., Torres, E. & McCarty, G.W. ( 2006) Mid- and near-infrared spectroscopic assessment of soil compositional parameters and structural indices in two Feral soils. Geoderma, 136, 245-259.
28.
Martin, J., Sampedro, I., Garcia-Romera, I., Garcia-Garrido, J.M. & Ocampo, J.A. ( 2002) Arbuscular mycorrhizal colonization and growth of soybean (Glycine max) and lettuce (Lactuc sativa) and phytotoxic effects of olive mill residues. Soil Biology and Biochemistry, 34, 1769-1775.
29.
Mustin, M. ( 1987). Le compost, gestion de la matière organique, pp. 954. Dubusc F , Paris.
30.
Ouatmane, A., Provenzano, M.R., Hafidi, M. & Senesi, N. ( 2000) Compost maturity assessment using calorimetry, spectroscopy and chemical analysis. Compost Science and Utilization, 8, 135-146.
31.
Paredes, C., Bernal, M.P., Cegarra, J. & Roig, A. ( 2005) Influence of olive mill wastewater in composting and impact of the compost on a Swiss chard crop and soil properties. Environment International, 31, 305-312.
32.
Paredes, C., Roig, A., Bernal, M.P., Sanchez-Monedero, M.A. & Cegarra, J. ( 2000) Evolution of organic matter and nitrogen during co-composting of olive mill wastewater with solid organic wastes. Biology and Fertility of Soils, 32, 222-227.
33.
Pearson, J., Lu, F. & Gandhi, K. ( 2004) Disposal of wool scouring sludge by composting. Autex Research Journal, 4, 147-156.
34.
Rao, N., Grethlin, H.E. & Reddy, C.A. ( 1995) Effect of C/N ratio and moisture content on the composting of polar wood. Biotechnology Letters, 17, 889-892.
35.
Ros, M., Klammer, S., Knapp, B., Aichberger, K. & Insam, H. ( 2006) Long-term effects of compost amendment of soil on functional and structural diversity and microbial activity. Soil Use and Management, 22, 209-218.
36.
Said-Pullicino, D., Erriquens, G.F., Gigliotti, G. ( 2007) Changes in the chemical characteristics of water-extractable organic matter during composting and their influence on compost stability and maturity. Bioresource Technology, 98, 1822-1831.
37.
Sanchez-Monedero, M.A., Roig, A., Paredes, C. & Bernal, M.P. ( 2001) Nitrogen transformation during organic waste composting by the Rutgers system and its effects on pH, EC and maturity of the composting mixtures. Bioresource Technology, 78, 301-308.
38.
Sellami, F., Hachicha, S., Chtourou, M., Medhioub, K. & Ammar, E. ( 2007) Bioconversion of wastes from the olive oil and confectionary industries: spectroscopic study of humic acids. Environmental Technology, 28, 1285-1298.
39.
Sellami, F., Hachicha, S., Chtourou, M., Medhioub, K. & Ammar, E. ( 2008) Maturity assessment of composted olive mill wastes using UV spectra and humification parameters. Bioresource Technology , 99, 6900-6907.
40.
Simkovic, I., Dlapa, P., Doerr, S.H., Mataix-Solera, J. & Sasinkova, V. ( 2008) Thermal destruction of soil water repellency and associated changes to soil organic matter as observed by FTIR spectroscopy. Catena, 74, 205-211.
41.
Smidt, E., Lechner, P., Schwanninger, M., Haberhauer, G. & Gerzabek, M.H. ( 2002) Characterization of waste organic matter by FTIR spectroscopy . Application in Waste Science, 56, 1170-1175.
42.
Thambirajah, J.J., Zulkali, M.D. & Hashim, M.A. ( 1995) Microbiological and biochemical changes during the composting of oil palm empty-fruitbunches. Effect of nitrogen supplementation on the substrate. Bioresource Technology, 52, 133-144.
43.
Tiquia, S.M. ( 2003) Evaluation of organic matter and nutrient composition of partially decomposed and composted spent pig litter. Environmental Technology, 24, 97-107.
44.
Tiquia, S.M., Tam, N.F.Y. & Hodgkiss, I.J. ( 1996) Microbial activities during composting of spent pig manure sawdust litter at different moisture contents. Bioresource Technology, 55, 201-206.
45.
Tognetti, C., Mazzarino, M.J. & Laos F. ( 2007) Improving the quality of municipal organic waste compost . Bioresource Technology, 98, 1067-1076.
46.
Wong, J.W.C., Mak, K.F., Chan, N.W. et al. (2001) Co-composting of soybean residues and leaves in Hong Kong. Bioresource Technology, 76, 99-106.
47.
Zeng, G., Huang, D., Huang, G. et al. (2007) Composting of lead-contaminated solid waste with inocula of white-rot fungus. Bioresource Technology, 98, 320-326.
