Effect of the disposal of sludge from olive processing on some soil characteristics: Laboratory experiments

Riffaldi, R.; Levi‐Minzi, R.; Saviozzi, Alessandro; Vanni, G.; Scagnozzi, A.

doi:10.1007/bf00478162

Cited by 39 publications

(16 citation statements)

References 10 publications

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“…The results revealed that 20 days after sludge application, even if the highest dose was applied to soil, no toxicity was reported. It was therefore concluded that OMW sludge can be most effectively employed as soil fertiliser; the duration of application still requires further investigation (Riffaldi et al. , 1993).…”

Section: Final Product (Fertiliser)/usesmentioning

confidence: 99%

Current and potential uses of composted olive oil waste

Arvanitoyannis

Kassaveti

2007

Int J of Food Sci Tech

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Food industry will have to focus on waste avoidance as well as utilisation of process waste. Application of clean technologies greatly enhances the safety and quality of the product as well as reducing the energy requirements and environmental impact of the food industry. The main environmental impacts of the food sector are aquatic, atmospheric and solid waste emissions. Nowadays, the main treatment method of solid wastes is composting, while recovery and reuse of by-products and wastes as raw materials stand for another effective option (http:// www.oulu.fi/resopt/wasmin/pap.pdf). Composted olive oil waste can find applications (1) as amendment in agriculture because of its high nitrogen and phosphorus content, (2) as a biofertiliser, with a mixture of compost with Sphagnum peat or commercial substrate finding use for ornamental plants growth and (3) as a biofilter for toxic metal removal. However, there are a number of disadvantages as well, such as large decline of soil germination capability, necrosis of the leaves and slow emission of secondary stems, and enhanced phytotoxicity, because of pH neutralisation technique, which should be seriously taken into account prior to opting for composting as a promising waste treatment alternative.

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Section: Final Product (Fertiliser)/usesmentioning

confidence: 99%

Current and potential uses of composted olive oil waste

Arvanitoyannis

Kassaveti

2007

Int J of Food Sci Tech

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“…The biochemical oxygen demand and chemical oxygen demand (COD) of this wastewater, from only one olive mill, causes environmental damage equivalent to that of the untreated municipal wastes of a town with 30 000 inhabitants. The OMW has a direct effect on the environment, causing pollution of surface and groundwaters, cultivated fields, and aquatic ecosystems, including the sea, mainly because of the high concentration of organic compounds and particularly of polyphenols ( Mendia et al, 1986 ; Tsonis, 1988 ; Tsonis et al, 1989 ). Furthermore, because of the high organic load of OMW, it may contribute significantly to eutrophication of recipients in which fluid exchange rates are low (closed gulfs, estuaries, lakes, etc.).…”

Section: Introductionmentioning

confidence: 99%

“…Depending on soil composition and because of the mineral and organics content of the wastes, it may be beneficial for the soil ( Balatsouras, 1997 ; Di Giovacchino et al, 2002 ; Papadimitriou et al, 1997 ; Riffaldi et al, 1993 ; Tamburino et al 1999 ). A method, practiced widely, although illegally, is the disposal of OMW into surface waters, including lakes, rivers, and the sea, with disastrous environmental consequences ( Di Giovacchino et al, 2002 ; Tamburino et al, 1999 ; Tsonis, 1988 ; Tsonis et al, 1989 ). Al‐Malah et al (2000) used a series of treatment steps composed of settling, centrifugation, and filtration to condition OMW followed by post‐treatment processes, including adsorption on activated clay.…”

Section: Introductionmentioning

confidence: 99%

Membrane Filtration of Olive Mill Wastewater and Exploitation of Its Fractions

Paraskeva¹,

Papadakis²,

Kanellopoulou³

et al. 2007

Water Environment Research

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Olive mill wastewater (OMW) produced from small units scattered in rural areas of Southern Europe is a major source of pollution of surface and subsurface water. In the present work, a treatment scheme based on physical separation methods is presented. The investigation was carried out using a pilot‐plant unit equipped with ultrafiltration, nanofiltration, and reverse osmosis membranes. Approximately 80% of the total volume of wastewater treated by the membrane units was sufficiently cleaned to meet the standards for irrigation water. The concentrated fractions collected in the treatment concentrates were characterized by high organic load and high content of phenolic compounds. The concentrates were tested in hydroponic systems to examine their toxicity towards undesired herbs. The calculations of the cost of the overall process showed that fixed and operational costs could be recovered from the exploitation of OMW byproducts as water for irrigation and/or as bioherbicides.

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“…Several studies have been conducted on the direct application of OMW to soil as a fertiliser, either as a fresh liquid or sludge, sometimes with contradictory results (Morisot and Tournier 1986;Saviozzi et al 1993;Riffaldi et al 1993). Controlled land application of OMW improves the fertility status and productivity of soil by controlling the nutritional and biological equilibrium in the soil-plant system Cox et al 1997;Rinaldi et al 2003).…”

Section: Soil Propertiesmentioning

confidence: 97%

Olive oil history, production and by-product management

Kapellakis

Tsagarakis

Crowther

2007

Rev Environ Sci Biotechnol

168

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In this review paper, the history of the olive tree and the development of the main olive oil extraction systems employed in the past are presented. Furthermore, the management techniques employed from antiquity until today for the treatment of olive mill wastewater (OMW), which constitutes the most important by-product of olive oil production, are addressed and compared. Reference is also made to global olive oil production, the environmental impacts of the uncontrolled disposal of OMW, and to the legal framework concerning its management in the main olive oil producing countries. Other byproducts of olive processing are also discussed.

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Effect of the disposal of sludge from olive processing on some soil characteristics: Laboratory experiments

Cited by 39 publications

References 10 publications

Current and potential uses of composted olive oil waste

Current and potential uses of composted olive oil waste

Membrane Filtration of Olive Mill Wastewater and Exploitation of Its Fractions

Olive oil history, production and by-product management

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