scholarly journals A Novel Photocatalyst with Ferromagnetic Core Used for the Treatment of Olive Oil Mill Effluents from Two-Phase Production Process

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Javier Miguel Ochando-Pulido ◽  
Gassan Hodaifa ◽  
María Dolores Víctor-Ortega ◽  
Antonio Martínez-Ferez
Keyword(s):  
Olive Oil ◽  
Treatment Process ◽  
Pilot Scale ◽  
Photocatalytic Process ◽  
Olive Oil Mill Wastewater ◽  
Two Phase ◽  
Overall Efficiency ◽  
Washing Wastewater ◽  
Continuous Centrifugation ◽  
Phase Production

Photocatalytic degradation of olive oil mill wastewater from two-phase continuous centrifugation process was studied. A novel photocatalyst with ferromagnetic properties was characterized and investigated. The degradation capacity of the photocatalytic process of olive oil washing wastewater (OMW) and mixture of olives and olive oil (1 v/v) washing wastewaters (MOMW) was demonstrated. At lab-scale, the %COD removal and residence time (τ) for MOMW and OMW were 58.4% (τ=2 h) and 21.4% (τ=3 h), respectively. On the other hand, at pilot scale, 23.4%CODremoval, 19.2% totalphenolsremoval, and 28.1% total suspendedsolidsremovalwere registered at the end of the UV/TiO2process for OMW, whereas 58.3%CODremoval, 27.5% totalphenolsremoval, and 25.0% total suspendedsolidsremovalfor MOMW. Also, before the UV/TiO2reaction, a pH-T flocculation operation as pretreatment was realized. The overall efficiency of the treatment process for MOMW was up to 91% ofCODremoval, in contrast with 33.2% ofCODremovalfor OMW.

Application of ADM1 for the simulation of anaerobic digestion of olive pulp under mesophilic and thermophilic conditions

2006 ◽  
Vol 54 (4) ◽  
pp. 149-156 ◽  
Author(s):  
H. Kalfas ◽  
I.V. Skiadas ◽  
H.N. Gavala ◽  
K. Stamatelatou ◽  
G. Lyberatos
Keyword(s):  
Anaerobic Digestion ◽  
Olive Oil ◽  
Volatile Fatty Acids ◽  
Two Phase ◽  
Solids Concentration ◽  
Thermophilic Conditions ◽  
Maximum Uptake Rate ◽  
Standard Values ◽  
Olive Pulp ◽  
Phase Production

The management of the wastewater originating from olive oil producing industries poses a serious environmental problem. Recently, two-phase production of olive oil has been developed, leading to almost complete elimination of the bulk of the generated wastewater and, is thus regarded as an environmentally friendly technology. However, the main waste stream (olive pulp) is a slurry material characterized by high solids concentration (∼30%), requiring stabilisation before its final disposal. The anaerobic digestion of olive pulp is studied in this work under mesophilic and thermophilic conditions in CSTR-type digesters. The digesters were fed with water-diluted (1:4) olive pulp at an HRT of 20 days and an OLR of 3.94 kg COD m−3 d−1. In order to study the process kinetics, the digesters were subjected to impulse disturbances of different substrates. The IWA anaerobic digestion model was used to simulate the reactors' response. Some key process parameters, such as the specific maximum uptake rate constants and the saturation constants for the volatile fatty acids degradation were estimated and compared with the standard values suggested by the ADM1.

About two-phase olive oil washing wastewater simultaneous phenols recovery and treatment by nanofiltration

2018 ◽  
Vol 114 ◽  
pp. 159-168 ◽  
Author(s):  
J.M. Ochando-Pulido ◽  
J.R. Corpas-Martínez ◽  
A. Martinez-Ferez
Keyword(s):  
Olive Oil ◽  
Two Phase ◽  
Washing Wastewater

Optimization of continuous reactor at pilot scale for olive-oil mill wastewater treatment by Fenton-like process

2013 ◽  
Vol 220 ◽  
pp. 117-124 ◽  
Author(s):  
Gassan Hodaifa ◽  
J.M. Ochando-Pulido ◽  
S. Rodriguez-Vives ◽  
A. Martinez-Ferez
Keyword(s):  
Wastewater Treatment ◽  
Olive Oil ◽  
Pilot Scale ◽  
Continuous Reactor ◽  
Olive Oil Mill Wastewater

scholarly journals Comparison between different liquid-liquid and solid phase methods of extraction prior to the identification of the phenolic fraction present in olive oil washing wastewater from the two-phase olive oil extraction system

2017 ◽  
Vol 68 (3) ◽  
pp. 208 ◽  
Author(s):  
S. Jiménez-Herrera ◽  
J. M. Ochando-Pulido ◽  
A. Martínez-Ferez
Keyword(s):  
Phenolic Compounds ◽  
Olive Oil ◽  
Solid Phase ◽  
Lipid Fraction ◽  
Liquid Extraction ◽  
Biologically Active ◽  
Two Phase ◽  
Phenolic Fraction ◽  
Hydrocinnamic Acid ◽  
Washing Wastewater

Phenolic compounds from olive mill wastewater (OMW), are characterized by a strong antioxidant activity. At the same time, they represent an environmental problem because they are difficult to degrade. The purpose of this work was to identify these biologically active compounds in the OMW from two-phase olive oil production in order to convert a polluting residue into a source of natural antioxidants. After optimizing the extraction process of phenolic compounds using liquid-liquid extraction (LLE) and solid phase extraction (SPE) methods, it was determined that the most appropriate sequence comprised a previous centrifugation to remove the lipid fraction, followed by liquid extraction with ethyl acetate or SPE. The most important compounds identified in olive oil washing wastewater (OOWW) were tyrosol, hydroxytyrosol and succinic acid; whereas the ones in the wastewater derived from the washing of the olives (OWW) were cresol, catechol, 4-methylcatechol, hydrocinnamic acid and p-hydroxy-hydrocinnamic acid.

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