scholarly journals A review on thermochemical treatment of biomass: Pyrolysis of olive mill wastes in comparison with other types of biomass

2016 ◽  
Vol 12 (1) ◽  
pp. 1-23
Author(s):  
M. Y. Guida ◽  
A. Hannioui
Keyword(s):  
Heating Rate ◽  
Thermochemical Treatment ◽  
Product Yield ◽  
Operating Parameters ◽  
Gaseous Products ◽  
Operating Variables ◽  
Operating Variable ◽  
Bio Oil ◽  
Olive Mill Wastes ◽  
Olive Mill

Each year, a great quantity of olive oil is produced by the unit mill of trituration. This activity generates two by-products named olive mill wastewater and olive mill solid waste representing major potential waste and environmental problem. However, there is growing interest in pyrolysis as a technology to treat wastes to produce valuable oil, char and gas products. The major important aim of waste pyrolysis is to produce liquid fuel or bio-oil, which is easy to store, transport and can be an alternative to energy source. The key influence on the product yield is the type of biomass feedstock and operating parameters (especially temperature and heating rate). It is important to investigate the effect of variables on response yield and impulse about their optimization. This study reviews operating variable from existing literature on olive mill wastes (OMSW and OMWW) in comparison with various types of biomass. The major operating variables include type of feedstock, final temperature of pyrolysis, heating rate and particle size. The scale of this paper is to analyse the influence of operating parameters on production of pyrolysis bio-oil, char and gaseous products.

Effects of operational parameters on bio-oil production from biomass

2019 ◽  
Vol 37 (5) ◽  
pp. 516-529 ◽  
Author(s):  
Ersin Üresin ◽  
Işıl Işık Gülsaç ◽  
Mustafa Salih Budak ◽  
Mehmet Ünsal ◽  
Kader Özgür Büyüksakallı ◽  
...  
Keyword(s):  
Heating Rate ◽  
Tubular Reactor ◽  
Mutual Effect ◽  
Oil Production ◽  
Operating Conditions ◽  
Lubricating Oil ◽  
Minor Effect ◽  
Operational Parameters ◽  
Gaseous Products ◽  
Bio Oil

In this study, the production of bio-oil from the pyrolysis of furniture sawdust, waste lubricating oil and their mixtures were investigated under certain operating conditions in the presence of lime and zeolites, by using a laboratory scale horizontal tubular reactor placed in a furnace. The main focus was to investigate the mutual effect of lime and commercial zeolite on the amount of the bio-oil production from furniture sawdust and waste lubricating oil. The selected operating parameters were pyrolysis temperatures and heating rate of 300°C and 650°C and flash heating or gradual heating rate (30°C/min). Additionally, three different additives were tested as catalysts; namely, lime (CaO), commercial zeolite (4A) and a natural zeolite (klinoptilolite). The amount of the produced bio-oil was analyzed by gas chromatography–flame ionization detector. The distribution of solid, liquid and gaseous products was determined for each operational condition. It was seen that the amount of the bio-oil was influenced by the amounts of sawdust and zeolite in the mixture. Experimental results showed that higher temperatures were more effective for the higher bio-oil amount. Additionally, heating rate was quite significant at 300°C whereas it has a minor effect on the bio-oil amount at 650°C. The highest bio-oil yield was obtained for the mixture of sawdust and waste lubricating oil in the presence of both lime and commercial zeolite with flash heating rate at 650°C.

Effect of Temperature and Heating Rate on the Char Yield in Sorghum and Straw Slow Pyrolysis

2017 ◽  
Vol 68 (3) ◽  
pp. 576-580 ◽  
Author(s):  
Alexandru Filipovici ◽  
Dumitru Tucu ◽  
Andrzej Bialowiec ◽  
Przemyslaw Bukowski ◽  
George Catalin Crisan ◽  
...  
Keyword(s):  
Heating Rate ◽  
Energy Production ◽  
Product Yield ◽  
Char Yield ◽  
Effect Of Temperature ◽  
Rate Parameter ◽  
Pyrolysis Process ◽  
Influence Of Process Parameters ◽  
Slow Pyrolysis ◽  
Bio Oil

Different approach to valorise the sweet sorghum using pyrolysis process to obtain valuable resources for energy production: bio-char, bio-oil and syngas are presented in the paper. In this study the influence of process parameters of slow pyrolysis on sorghum and straw were analysed. Temperatures used in the process varied from 400 to 800�C and heating rate parameter varied from 10�C . min-1 to 65�C . min-1. The experiments were conducted using a lab scale slow pyrolysis reactor with electric heaters, equipped with a thermo balance analyzer to collect data of pyrolysis process. The achieved product yield can vary significantly according to the slow pyrolysis parameters. The temperature influenced more on the bio-char yield compared to the heating rate parameter. The highest bio-char yield (over 35% weight,) was obtained at 400�C and heating rate of 10�C . min-1.

scholarly journals Impact of Emerging Technologies on Virgin Olive Oil Processing, Consumer Acceptance, and the Valorization of Olive Mill Wastes

Antioxidants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 417
Author(s):  
Maria Pérez ◽  
Anallely López-Yerena ◽  
Julián Lozano-Castellón ◽  
Alexandra Olmo-Cunillera ◽  
Rosa M. Lamuela-Raventós ◽  
...  
Keyword(s):  
Olive Oil ◽  
Electric Fields ◽  
Emerging Technologies ◽  
Virgin Olive Oil ◽  
Consumer Preference ◽  
Extra Virgin Olive Oil ◽  
Microwave Treatment ◽  
Olive Mill Wastes ◽  
Minor Compounds ◽  
Olive Mill

There is a growing consumer preference for high quality extra virgin olive oil (EVOO) with health-promoting and sensory properties that are associated with a higher content of phenolic and volatile compounds. To meet this demand, several novel and emerging technologies are being under study to be applied in EVOO production. This review provides an update of the effect of emerging technologies (pulsed electric fields, high pressure, ultrasound, and microwave treatment), compared to traditional EVOO extraction, on yield, quality, and/or content of some minor compounds and bioactive components, including phenolic compounds, tocopherols, chlorophyll, and carotenoids. In addition, the consumer acceptability of EVOO is discussed. Finally, the application of these emerging technologies in the valorization of olive mill wastes, whose generation is of concern due to its environmental impact, is also addressed.

Sustainable biofuels and biochar production from olive mill wastes via co-pyrolysis process

2021 ◽  
Author(s):  
Mohamed Hechmi Aissaoui ◽  
Aïda Ben Hassen Trabelsi ◽  
Samira Abidi ◽  
Kaouther Zaafouri ◽  
Khouloud Haddad ◽  
...  
Keyword(s):  
Pyrolysis Process ◽  
Olive Mill Wastes ◽  
Olive Mill

Maximum heating rates for producing undistorted glassy carbon ware determined by wedge-shaped samples

1996 ◽  
Vol 11 (9) ◽  
pp. 2368-2375 ◽  
Author(s):  
Hossein Maleki ◽  
Lawrence R. Holland ◽  
Gwyn M. Jenkins ◽  
R. L. Zimmerman ◽  
Wally Porter
Keyword(s):  
Heating Rate ◽  
Treatment Process ◽  
Gaseous Product ◽  
Pyrolysis Mass Spectrometry ◽  
Heating Rates ◽  
Gaseous Products ◽  
Volatile Products ◽  
Solid Bodies ◽  
Polymeric Carbon ◽  
Maximum Heating

Polymeric carbon artifacts are particularly difficult to make in thick section. Heating rate, temperature, and sample thickness determine the outcome of carbonization of resin leading to a glassy polymeric carbon ware. Using wedge-shaped samples, we found the maximum thickness for various heating rates during gelling (300 K–360 K), curing (360 K–400 K), postcuring (400 K–500 K), and precarbonization (500 K–875 K). Excessive heating rate causes failure. In postcuring the critical heating rate varies inversely as the fifth power of thickness; in precarbonization this varies inversely as the third power of thickness. From thermogravimetric evidence we attribute such failure to low rates of diffusion of gaseous products of reactions occurring within the solid during pyrolysis. Mass spectrometry shows the main gaseous product is water vapor; some carboniferous gases are also evolved during precarbonization. We discuss a diffusion model applicable to any heat-treatment process in which volatile products are removed from solid bodies.

Ecophysiology and molecular phylogeny of bacteria isolated from alkaline two-phase olive mill wastes

2006 ◽  
Vol 157 (4) ◽  
pp. 376-385 ◽  
Author(s):  
Spyridon Ntougias ◽  
Georgios I. Zervakis ◽  
Constantinos Ehaliotis ◽  
Nektarios Kavroulakis ◽  
Kalliope K. Papadopoulou
Keyword(s):  
Molecular Phylogeny ◽  
Two Phase ◽  
Olive Mill Wastes ◽  
Olive Mill

Characterization of olive mill wastes composts and their humic acids: stability assessment within different particle size fractions

2013 ◽  
Vol 34 (6) ◽  
pp. 787-797 ◽  
Author(s):  
Saoussan Masmoudi ◽  
Raja Jarboui ◽  
Hafedh El Feki ◽  
Teresa Gea ◽  
Khaled Medhioub ◽  
...  
Keyword(s):  
Particle Size ◽  
Humic Acids ◽  
Stability Assessment ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Olive Mill Wastes ◽  
Olive Mill

scholarly journals Screening of winery and olive mill wastes for lignocellulolytic enzyme production from Aspergillus species by solid-state fermentation

2013 ◽  
Vol 4 (3) ◽  
pp. 201-209 ◽  
Author(s):  
José Manuel Salgado ◽  
Luís Abrunhosa ◽  
Armando Venâncio ◽  
José Manuel Domínguez ◽  
Isabel Belo
Keyword(s):  
Solid State ◽  
Solid State Fermentation ◽  
Enzyme Production ◽  
Aspergillus Species ◽  
Olive Mill Wastes ◽  
Olive Mill

scholarly journals Potential for Production of Biochar-Based Fertilizers from Olive Mill Waste in Mediterranean Basin Countries: An Initial Assessment for Spain, Tunisia, and Greece

2020 ◽  
Vol 12 (15) ◽  
pp. 6081 ◽  
Author(s):  
Evan A.N. Marks ◽  
Vasiliki Kinigopoulou ◽  
Hanene Akrout ◽  
Ahmed Amine Azzaz ◽  
Charalampos Doulgeris ◽  
...  
Keyword(s):  
Total Mass ◽  
Hydrothermal Carbonization ◽  
Thermal Conversion ◽  
Application Rate ◽  
Solid Wastes ◽  
Initial Assessment ◽  
Olive Mill Waste ◽  
Olive Mill Wastes ◽  
Mill Waste ◽  
Olive Mill

Olive mill wastes continue to be a management challenge due to the large volumes produced, particularly due to their toxicity and impacts on the environment. Thermal conversion through pyrolysis or hydrothermal carbonization techniques can detoxify wastes while conserving nutrient contents. In this work, we produced up-to-date data on olive mill waste flows in Spain, Tunisia, and Greece and characterized representative samples in the laboratory. Assays of thermal conversion of olive mill wastewaters and solid wastes were also performed to understand biochar yields and final properties, and the total quantities of nutrients contained were estimated. Of particular note were the quantities of potassium in Tunisian wastewaters, representing 0.6% of the total mass and an annual flow of approximately 5000 t, and in the Spanish solid wastes, an average of 1.7% of the total mass is potassium, representing an annual flow of approximately 23,000 t. Concerning phosphorus, Spanish solid wastes had the highest contents (0.1%), double that of other countries’ wastes. Annually, olive mill wastes from the three countries are estimated to contain approximately 35 × 103 tons of potassium and 2.6 × 103 tons of phosphorus. With this resource converted to biochar, each year more than 700 km2 of soils could be enriched in 0.2% carbon with biochar at an application rate of 7 t ha−1.

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