Fired clay masonry units production incorporating two-phase olive mill waste (alperujo)

Casa, José A. de la; Romero, Inmaculada; Jiménez, Junior Vega; Castro, Eulógio

doi:10.1016/j.ceramint.2012.03.003

Cited by 48 publications

(21 citation statements)

References 22 publications

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“…Apart from this, several alternatives have been proposed to minimize the environmental impact and to recycle ALP, such as the production of building ceramic material (de la Casa et al 2012), the obtaining and recovery of antioxidant compounds (Madrona et al 2009;Rodríguez et al 2009), the production of thermal or electrical energy, after the residual oil extraction (Arvanitoyannis, Kassaveti, and Stefanatos 2007), for soil bioremediation (Burgos et al 2010;de la Fuente et al 2011), and as organic fertilizer (Kavdir and Killi 2008; Lozano-García, Parras-Alcántara, and del Toro Carrillo de Albornoz 2011). However, most of these uses are generally very expensive and unable to completely solve the problem of these residues, and only the agricultural use is an economically and ecologically acceptable way to dispose of them.…”

Section: Introductionmentioning

confidence: 99%

Recycling of Two-Phase Olive-Mill Cake “Alperujo” by Co-composting with Animal Manures

Paredes

Pérez-Murcia

Pérez‐Espinosa

et al. 2014

Communications in Soil Science and Plant Analysis

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The use of poultry manure or goat/sheep manure in the co-composting of the two-phase olive-mill cake "alperujo" (ALP) with olive leaf (OL) is compared by studying organic-matter mineralization and humification processes during composting and the characteristics of the end products. For this, two different piles (P1 and P2) were prepared using ALP with OL mixed with poultry manure (PM) and goat/sheep manure (GSM), respectively, and composted by the turned windrow composting system. Throughout the composting process, a number of parameters were monitored, such as temperature, pH, electrical conductivity (EC), organic matter (OM), OM losses, total organic carbon (C org ), total nitrogen (N t ), C org /N t ratio, and the germination index (GI). In both piles, the temperature exceeded 55 • C for more than 2 weeks, which ensured maximum pathogen reduction. Organic-matter losses followed a first-order kinetic equation in both piles. The final composts presented a stabilized OM and absence of phytotoxins, as observed in the evolution and final values of the C org /N t ratio (C org /N t < 20) and the germination index (GI > 50 percent). Therefore, composting can be considered as an efficient treatment to recycle this type of waste, obtaining composts with suitable properties that can be safely used in agriculture.

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Section: Introductionmentioning

confidence: 99%

Recycling of Two-Phase Olive-Mill Cake “Alperujo” by Co-composting with Animal Manures

Paredes

Pérez-Murcia

Pérez‐Espinosa

et al. 2014

Communications in Soil Science and Plant Analysis

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“…Different amounts (3, 6, and 12 wt%) of clay have been substituted by alperujo, and the properties of the resulting ceramic units were compared to those of conventional products. Addition of 12 wt% alperujo showed advantages such as [60] (i) lower density (1710 kg m −3 vs 1850 kg m −3 of the reference value). The lower density is caused by greater water absorption in experimental bricks than in traditional bricks.…”

Section: Overall Use Of Either Alperujo or Orujomentioning

confidence: 99%

“…(iii) The strength attained (approximately 14 N mm −2 ) is enough high for this type of units. Finally, (iv) the reduction of the traditional firing temperature of 920-880 ∘ C when alperujo is added to the raw material, which results in heating requirements reduced within the range 2.4-7.3%, depending on the final product [60]. In all the studies, the resulting units are equivalent to traditional bricks in mechanical properties and can save water and energy in the production process.…”

Section: Overall Use Of Either Alperujo or Orujomentioning

confidence: 99%

Coverage Exploitation of By‐Products from the Agrofood Industry

Ledesma‐Escobar

Castro

2015

Green Extraction of Natural Products

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“…Since then, many researchers have studied the recovery of alperujo in fired brick manufacturing. The physical and mechanical properties of these bricks have been compared to those with no added alperujo in order to evaluate whether this method is suitable for industrial implementation (19)(20). Recently, other research groups have incorporated olive mill wastewater as a substitute for water in brick manufacturing whose physical stability was confirmed (21)(22)(23).…”

Section: Introductionmentioning

confidence: 99%

The effect of the addition of ground olive stones on the physical and mechanical properties of clay bricks

2016

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This study deals with the effect of ground olive stones (GOS) on the performance of fired clay bricks. Seven different clay-GOS mixes with 0, 1, 2, 3, 4, 5 and 10 wt % of GOS respectively were used for making fired brick samples. All samples were fired at 900 °C. The technological properties of the resultant material were then determined, including shrinkage, apparent density, pore size distribution, thermal conductivity, water absorption, and compressive and flexural strength. The addition of GOS to the mixture reduced the compressive strength of fired clay bricks. All clay brick pieces exhibited low firing shrinkage. It was apparent that as the percentage of GOS increased in the body, there was a noticeable increase in porosity. The water absorption coefficient decreased with increasing additions. The results indicated that thermal conductivity decreases with decrease in density and increase in porosity in fired clay bricks. RESUMEN: Efecto de la adición de huesos de aceituna triturados en las propiedades físicas y mecánicas de ladrillos de arcilla.En este trabajo se ha estudiado el efecto de la incorporación de huesos de aceituna triturados en las prestaciones de ladrillos de arcilla cocida. Se utilizaron siete proporciones de huesos de aceituna 0 %, 1 %, 2 %, 3 %, 4 %, 5 % y 10 % en peso. Todas las muestras se calcinaron a 900 °C y posteriormente se determinaron las propiedades resultantes, incluyendo la densidad aparente, retracción, distribución de tamaños de poro, conductividad térmica, absorción de agua y resistencias mecánicas. La adición de huesos de aceituna molidos a la mezcla redujo la resistencia a la compresión de los ladrillos de arcilla cocida. Además se observó que todas las piezas de ladrillo mostraron baja retracción tras exposición a altas temperaturas. Como era de esperar a medida que el porcentaje de huesos de aceituna molidos aumentó, la porosidad se incrementó de manera evidente. El coeficiente de absorción de agua disminuyó con el aumento del porcentaje de sustitución. Los resultados indicaron que la conductividad térmica disminuye con la disminución de la densidad y el aumento de la porosidad.

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Fired clay masonry units production incorporating two-phase olive mill waste (alperujo)

Cited by 48 publications

References 22 publications

Recycling of Two-Phase Olive-Mill Cake “Alperujo” by Co-composting with Animal Manures

Recycling of Two-Phase Olive-Mill Cake “Alperujo” by Co-composting with Animal Manures

Coverage Exploitation of By‐Products from the Agrofood Industry

The effect of the addition of ground olive stones on the physical and mechanical properties of clay bricks

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