Combined combustion of various phases of olive wastes in a conventional combustor

Miranda, M.T.; Cabanillas, A.; Rojas, S.; Montero, I.; Ruiz, Arteaga

doi:10.1016/j.fuel.2006.07.026

Cited by 32 publications

(21 citation statements)

References 15 publications

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“…The found fixed carbon values were between 16.52% and 16.84%, while volatile matter was around 69%. Similar results were obtained in the investigations conducted on olive cake by Al-Widyan et al (2006), Mirande et al (2007) and Chouchene et al (2012), where fixed carbon was between 9.94 and 23.4%, while volatile matter was between 67.7 and 80.19%. High volatile matter content indicates that during combustion most of the biomass material will volatilize and burn as gas within the system.…”

Section: Rapeseed Cake As Substrate In Anaerobic Digestionsupporting

confidence: 89%

“…The samples were compared against CEN/TS 14961:2005 as the referent standard for solid biofuels quality. Table 1 shows that moisture content was approximately (7.00-7.31%) in both samples, which is similar to that of olive cake, as described in the available literature (Al-Widyan et al, 2006;Mirande et al, 2007;Chouchene et al, 2012). Moreover, ash content was somewhat above 7.0% which is a value higher than expected, but it remains within the upper limit of the CEN/TS 14961:2005 standard; high content of ash could be an effect of soil fertilization during rapeseed cultivation.…”

Section: Rapeseed Cake As Substrate In Anaerobic Digestionsupporting

confidence: 79%

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Reuse of rapeseed by-products from biodiesel production

Krička

Matin

Voća

et al. 2015

Span. j. agric. res.

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The objective of this paper is to investigate usability of rapeseed cake from biodiesel fuel production as an energy source. For this research, rapeseed was grown at the research site of the Faculty of Agriculture in Zagreb, Croatia. The investigated rapeseed cake, residue from cold pressing, was divided in two groups of samples. The first group was a mix of three varieties (Bristol, Express and Navajo), while the other group consisted of three hybrids (Artus, Baldur, Titan). The utilization of rapeseed cake for energy via two routes was evaluated; namely, utilization of rapeseed cake as (1) solid biofuel (pellets) with addition of 3% of glycerol, and (2) as substrate in anaerobic digestion (AD). In investigation of cake as solid fuel, proximate (moisture content, ash content, fixed carbon and volatile matter), ultimate (content of carbon, sulphur, hydrogen, oxygen and nitrogen) and physical and calometry analyses (abrasion, diameter, length, density, higher and lower heating value were carried out. As for its use in AD, production of biogas during 40 days was monitored with a view of assessing the use of digested residue as fertilizer in agricultural production. Both groups of digested residues were analysed (pH, electroconductivity, moisture content, ash content, content of nitrogen and carbon, C/N ratio, content of P 2 O 5 , K 2 O, Ca, Mg, Na). The analysis indicated that the investigated raw material is usable as solid and gas biofuel, and digested residue as fertilizer in ecological agriculture. The two groups of samples analysed here did not show significant differences. Additional keywords: rapeseed cake; Brassica napus; pressing; pelletizing; biogas production; proximate and ultimate analysis Abbreviations used: AD (anaerobic digestion); D (diameter); EC (electroconductivity); EU (European Union); HHV (higher heating value); L (lenght); LHV (lower heating value) Citation: Krička, T.; Jurišić, V.; Bilandžija, N. (2015). Reuse of rapeseed by-products from biodiesel production. Spanish Journal of Agricultural Research, Volume 13, Issue 1, e02-007, 9 pages. http://dx

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Section: Rapeseed Cake As Substrate In Anaerobic Digestionsupporting

confidence: 89%

Section: Rapeseed Cake As Substrate In Anaerobic Digestionsupporting

confidence: 79%

Reuse of rapeseed by-products from biodiesel production

Krička

Matin

Voća

et al. 2015

Span. j. agric. res.

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“…It is generally composed of olive fruit's water content, soft pulp tune in emulsified oil (soft tissues from the olive pulp), and water which is used to wash the various stages of the oil extraction process (Kıpçak, et al, 2011). In order to treat OMWW, different biochemical/biotechnical methods and thermochemical methods have been used, such as direct combustion (Miranda, et al, 2007), pyrolysis (Guida, et al, 2016;Vitolo, et al, 1999), gasification (Kıpçak, et al, 2011), etc.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal liquefaction of oil mill wastewater for bio-oil production in subcritical conditions

Hadhoum

Balistrou

Burnens

et al. 2016

Bioresource Technology

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:The main purpose of this study is to investigate the direct hydrothermal liquefaction of oil mill wastewater (OMWW). Experiments were carried out at different temperatures (240-300 _C), water contents (58-88 wt.%) and reaction times (15-45 min). Results show that the highest bio-oil yield was about 58 wt.%, resulting in a higher heating value of 38 MJ/kg. This was conducted at the following optimal conditions: water content 88 wt.%, a temperature of 280 _C, and 30 min as reaction time. To put bio-oil into wide application, the various physical and chemical characteristics were determined. A detailed chemical composition analysis of bio-oil was performed by gas chromatography-mass spectrometry (GC-MS) coupled with a flame ionization detector (FID). The dominant compounds were identified by using NIST library. Analyses show that the bio-oil contains mainly oleic acid, hexadecanoic acid, fatty acid methyl ester, fatty acid ethyl ester, amino acid derived compounds and phenolic compounds.

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“…AL is a very wet and pasty lignocellulosic material, difficult to handle and transport, which includes potentially pollutant compounds such as phenols and fats. Apart from the treatments to recover its residual oil (second centrifugation, and drying followed by chemical extraction), several methods have been considered for AL disposal (Aragón and Palancar 2001; Borja et al 2006;Miranda et al 2007;Morillo et al 2008;Rincón et al 2008), including physical, chemical and biological processes. Amongst the last of these, composting is increasingly considered a good way of improving profits and the viability of the olive oil production process, and much research work has been carried out in the recent decades to recycle the organic matter and nutrient contents of olive-mill wastes by composting, as noted in Azbar et al (2004) and Roig et al (2006).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of “alperujo” composting based on organic matter degradation, humification and compost quality

et al. 2008

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The main by-product generated by the Spanish olive oil industry, a wet solid lignocellulosic material called "alperujo" (AL), was evaluated as a composting substrate by using different aeration strategies and bulking agents. The experiments showed that composting performance was mainly influenced by the type of bulking agent added, and by the number of mechanical turnings. The bulking agents tested in this study were cotton waste, grape stalk, a fresh cow bedding and olive leaf; the latter showed the worse performance. Forced ventilation alone was revealed to work inadequately in most of the experiments. The composting process involved a substantial degradation of the organic substrate with average losses of 48.4, 28.6, 53.7 and 57.0% for total organic matter, lignin, cellulose and hemicellulose, respectively. Both organic matter biodegradation and humification were greatly influenced by the lignocellulosic nature of the starting material, which led to low organic matter and nitrogen loss rates and a progressive increase in more humified substances, as revealed by the end-values of the humification indices. The resulting composts were of good quality in terms of nutrient content, stabilised and non-phytotoxic organic matter and low heavy metal content. This demonstrates that composting technology can be used as an alternative treatment method to turn AL into compost that can be used as organic amendments or fertilisers for agricultural systems.

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Combined combustion of various phases of olive wastes in a conventional combustor

Cited by 32 publications

References 15 publications

Reuse of rapeseed by-products from biodiesel production

Reuse of rapeseed by-products from biodiesel production

Hydrothermal liquefaction of oil mill wastewater for bio-oil production in subcritical conditions

Evaluation of “alperujo” composting based on organic matter degradation, humification and compost quality

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