Feasibility of vermicomposting residues from olive oil production obtained using two stage centrifugation

Nogales, R.; Thompson, R.B.; Calmet, A.; Benítez, Emilio; Gómez, Maria Margarita Ramírez; Elvira, Carlos

doi:10.1080/10934529809376800

Cited by 31 publications

(21 citation statements)

References 10 publications

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“…These reductions were similar or greater than those recorded in other organic wastes decomposed by earthworms (Elvira et al 1998;Nogales et al 1999) or lignin degrader's fungi (Sing & Sharma 2002). The lower TOC recorded in the WOC decomposed by E. fetida appears to be a result of the presence of specific intestine microorganisms and gut enzymes in the earthworms (Nogales et al 1999), which enhanced the mineralization of the organic matter contained in the substrate.…”

Section: Changes In Organic Matter and Elemental Compositionmentioning

confidence: 49%

“…These low-cost biotechnological agents are used for processing and transforming a great number of organic wastes (Edwards et al, 1988). Likewise, vermicomposting could be used for produce stable organic amendments from wet olive cake, given that this process has been used efficiently for the stabilization, maturation and detoxification of other olive wastes, such as dry olive cake and olive-mill wastewater (Benitez et al 2002;Mari et al 2003;Nogales et al 1998). …”

Section: Introductionmentioning

confidence: 97%

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Enzyme Activities and Chemical Changes in Wet Olive Cake after Treatment with Pleurotus ostreatus or Eisenia fetida

et al. 2006

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A laboratory experiment was conducted to evaluate the enzyme activities and chemical changes recorded in a recalcitrant phenolic-rich waste after treatment with Pleurotus ostreatus or Eisenia fetida. The waste used was wet olive cake (alperujo in Spanish), a waste produced in huge amounts by the olive oil industry. Both P. ostreatus and E. fetida were very effective in removing phenolic compounds, the initial concentration in the wet olive cake being reduced in both cases by around 90%. Laccase and manganese peroxidase activities were measured in the growth medium of P. ostreatus, and catechol 2,3 dioxygenase activity was only detected in the waste treated with Eisenia; these could be the main factors responsible for the oxidation of phenolic compounds. Increases of dehydrogenase and beta-glucosidase activities were detected in the degraded wet olive cake by fungi or earthworms. In comparison with the natural wet olive cake, the degraded products had lower total organic carbon and humic acid contents but were rich in nitrogen and other nutrients, having lower C:N ratios. In addition, the toxicity of the wet olive cake against the seeds of Lepidium sativum significantly decreased after degradation. The low toxicity as well as moderate stability and maturity recorded in the wet olive cake treated with P. ostreatus or E. fetida imply that these products could be used as soil amendments.

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Section: Changes In Organic Matter and Elemental Compositionmentioning

confidence: 49%

Section: Introductionmentioning

confidence: 97%

Enzyme Activities and Chemical Changes in Wet Olive Cake after Treatment with Pleurotus ostreatus or Eisenia fetida

et al. 2006

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“…They concluded that earthworms can change the chemical profile of the exhausted waste material and levels of nitrogen, potassium, calcium and sulphur were comparable with other organic manures. Nogales et al (1998) studied the feasibility of using earthworms to stabilize dry olive cake. Addition of nitrogen rich organic materials such as cattle manure and sewage sludge to the dry olive cake produced substrates which were suitable for vermicomposting as indicated by appreciably improved earthworm growth and reproduction.…”

Section: Oil Extraction Industries Wastementioning

confidence: 99%

Industrial wastes and sludges management by vermicomposting

Yadav

Garg

2011

Rev Environ Sci Biotechnol

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Vermicomposting has been arising as an innovative ecotechnology for the conversion of various types of wastes into vermicompost. Vermicompost is humus like, finely granulated and stabilized material which can be used as a soil conditioner to reintegrate the organic matter to the agricultural soils. Industrial wastes remain largely unutilized and often cause environmental problems like ground and surface water pollution, foul odours, occupying vast land areas etc. Non-toxic and organic industrial wastes could be potential raw material for vermitechnology. In the last two decades, vermitechnology has been applied for the management of industrial wastes and sludges and to convert them into vermicompost for land restoration practices. The success of the process depends upon several process parameters like quality of raw material, pH, temperature, moisture, aeration etc., type of vermicomposting system and earthworm species used. The review discusses the vermitechnology and the present state of research in the vermicomposting industrial sludges and wastes.

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“…The ashes studied in the present work had K concentration between 14 and 58 g kg À1 , higher than values observed in wood ashes Kuba et al 2008). This is due to the high K content characteristic of olive wastes (Alburquerque et al 2004;Nogales et al 1998;Melgar et al 2009). Although an important fraction of the K contained in ashes should form insoluble complexes as a consequence of the high temperatures reached during the combustion of olive wastes (Lewis and Schmidt 1986), another fraction should be soluble and, as a consequence, should be rapidly available in the soil and extracted by crops (Ulery et al 1993;Nogales et al 2006).…”

Section: Resultsmentioning

confidence: 98%

“…Part of this waste is dried and treated with solvents to obtain olive-cake oil and a waste called dry olive cake, or orujillo. The orujillo (0.6-0.9 Mt/year in Andalusia) has recalcitrant organic matter, high potassium content, and low heating values between 14.5 and 20 MJ kg À1 (Agencia Andaluza de Energía 1999; Alburquerque et al 2004;Caputo et al 2003;Nogales et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Olive Waste Ashes as Fertilizers

Nogales

Delgado

Quirantes

et al. 2011

Recycling of Biomass Ashes

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Wet and dry olive cakes are the most important wastes generated when olive oil is produced. In recent years, both olive wastes have been incinerated to produce electricity, and thereby large amounts of fly and bottom ash are generated. In this study, physical, physicochemical, and chemical characteristics of olive waste ashes produced in Andalusian biomass power plants were analyzed to evaluate their suitability for agriculture. High variability among fly and bottom ashes may be ascribed to the origin of the olive waste and the combustion temperature. Waste olive ashes, which contained all particle sizes, showed high values of pH, salinity, water holding capacity, calcium carbonate equivalent, and P, K, Cu, and B contents. In contrast, moderate values were recorded for Ca, Mg, Zn, and Ni. Nitrogen is scarce in olive waste ashes; they thus can only be part of any fertilization strategy.

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Feasibility of vermicomposting residues from olive oil production obtained using two stage centrifugation

Cited by 31 publications

References 10 publications

Enzyme Activities and Chemical Changes in Wet Olive Cake after Treatment with Pleurotus ostreatus or Eisenia fetida

Enzyme Activities and Chemical Changes in Wet Olive Cake after Treatment with Pleurotus ostreatus or Eisenia fetida

Industrial wastes and sludges management by vermicomposting

Characterization of Olive Waste Ashes as Fertilizers

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