scholarly journals Precipitation of Solid Waste in Olive Mill Wastewater by Coagulation using Calcium Carbonate (CaCO3)

2021 ◽  
Vol 4 (3) ◽  
pp. 78-85
Author(s):  
Khaled Rawajfeh
Keyword(s):  
Calcium Carbonate ◽  
Solid Waste ◽  
Suspended Solids ◽  
Animal Feed ◽  
Electrical Conductance ◽  
Solid Material ◽  
Olive Mill Wastewater ◽  
Heating Value ◽  
Study Results ◽  
Olive Mill

This study aimed to use a chemical coagulant to treat Olive Mill Wastewater (OMW) in such a way as to improve and expedite the process of precipitating the solid waste material present in the wastewater. This process is of extreme importance in harvesting the solid material that can be used as domestic or industrial fuel material and as a supplement to animal feed. The chemical coagulant used in this study was calcium carbonate (CaCO3). The effect of the addition of this coagulant on some physical properties of olive mill wastewater (OMW) such as pH, electrical conductance (EC), the precipitated amount of the total suspended solids (TSS), and the higher heating value (HHV) of the precipitated solids was studied. It was found that small amounts of CaCO3 need to be added to affect the operation. The study results showed that the optimum value to be used was around three wt/wt %.

Photo-Fenton Treatment of Olive Mill Wastewater Applying a Combined Fenton/Flocculation Pretreatment

2005 ◽  
Vol 129 (1) ◽  
pp. 53-59 ◽  
Author(s):  
W. Gernjak ◽  
T. Krutzler ◽  
R. Bauer
Keyword(s):  
Hordeum Vulgare ◽  
Reaction Rate ◽  
Suspended Solids ◽  
Olive Mill Wastewater ◽  
Solar Irradiation ◽  
Initial Value ◽  
Hordeum Vulgare L ◽  
Phenolic Substances ◽  
Parabolic Collector ◽  
Olive Mill

In this work, a pretreatment involving a combination of acidification, the Fenton method, and flocculation with polyelectrolytes was successfully applied to remove the suspended solids of Olive mill wastewater (OMW). This pretreatment strongly augmented the reaction rate in the following photo-Fenton treatment under solar irradiation in a Compound Parabolic Collector pilot-plant at Plataforma Solar de Almería. The content in phenolic substances could be degraded down to zero, while DOC was degraded down to about 25% of the initial value. In the work we describe different aspects concerning the process parameters of the pretreatment and the photo-Fenton treatment. Furthermore, decrease in phytotoxicity in the course of the treatment was monitored by germination tests with barley (hordeum vulgare L.). The results indicate that acute phytotoxicity can be substantially reduced by the application of the above mentioned pretreatment, enabling OMW to be used for ferti-irrigation in agriculture.

scholarly journals Biogas Potential of the Side Streams Obtained in a Novel Phenolic Extraction System from Olive Mill Solid Waste

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5438
Author(s):  
África Fernández-Prior ◽  
Ángeles Trujillo-Reyes ◽  
Antonio Serrano ◽  
Guillermo Rodríguez-Gutiérrez ◽  
Claudio Reinhard ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Phenolic Compounds ◽  
Olive Oil ◽  
Solid Waste ◽  
Suspended Solids ◽  
Extraction Process ◽  
Methane Yield ◽  
Yield Coefficient ◽  
Olive Mill Solid Waste ◽  
Olive Mill

The olive oil production is an important industrial sector in many Mediterranean areas, but it is currently struggled by the necessity of a proper valorisation of the olive mill solid waste or alperujo. The alperujo is the main by-product generated during the two-phase olive oil extraction, accounting for up to 80% of the initial olive mass. The alperujo is a source of valuable compounds, such as the pomace olive oil or highly interesting phenolic compounds. In the present research, a novel biorefinery approach has been used for phenolic compounds recovery. However, the extraction of these valuables compounds generates different exhausted phases with high organic matter content that are required to be managed. This study consists of the evaluation of the anaerobic biodegradability of the different fractions obtained in a novel biorefinery approach for the integral valorisation of alperujo. The results show that the different phases obtained during the biorefinery of the alperujo can be effectively subjected to anaerobic digestion and no inhibition processes were detected. The highest methane yield coefficients were obtained for the phases obtained after a two-months storages, i.e., suspended solids and liquid phase free of suspended solids, which generated 366 ± 7 mL CH4/g VS and 358 ± 6 mL CH4/g VS, respectively. The phenol extraction process reduced the methane yield coefficient around 25% due to the retention of biodegradable compounds during the extraction process. Regardless of this drop, the anaerobic digestion is a suitable technology for the stabilization of the different generated residual phases, whereas the high market price of the extracted phenols can largely compensate the slight decrease in the methane generation.

Treatment of olive mill wastewater by chemical processes: effect of acid cracking pretreatment

2014 ◽  
Vol 69 (7) ◽  
pp. 1453-1461 ◽  
Author(s):  
B. Hande Gursoy-Haksevenler ◽  
Idil Arslan-Alaton
Keyword(s):  
Acute Toxicity ◽  
Chemical Treatment ◽  
Suspended Solids ◽  
Olive Mill Wastewater ◽  
Wastewater Sample ◽  
Fenton’S Reagent ◽  
Total Phenols ◽  
Fenton's Reagent ◽  
Treatment Processes ◽  
Olive Mill

The effect of acid cracking (pH 2.0; T 70 °C) and filtration as a pretreatment step on the chemical treatability of olive mill wastewater (chemical oxygen demand (COD) 150,000 m/L; total organic carbon (TOC) 36,000 mg/L; oil–grease 8,200 mg/L; total phenols 3,800 mg/L) was investigated. FeCl3 coagulation, Ca(OH)2 precipitation, electrocoagulation using stainless steel electrodes and the Fenton's reagent were applied as chemical treatment methods. Removal performances were examined in terms of COD, TOC, oil–grease, total phenols, colour, suspended solids and acute toxicity with the photobacterium Vibrio fischeri. Significant oil–grease (95%) and suspended solids (96%) accompanied with 58% COD, 43% TOC, 39% total phenols and 80% colour removals were obtained by acid cracking-filtration pretreatment. Among the investigated chemical treatment processes, electrocoagulation and the Fenton's reagent were found more effective after pretreatment, especially in terms of total phenols removal. Total phenols removal increased from 39 to 72% when pretreatment was applied, while no significant additional (≈10–15%) COD and TOC removals were obtained when acid cracking was coupled with chemical treatment. The acute toxicity of the original olive mill wastewater sample increased considerably after pretreatment from 75 to 89% (measured for the 10-fold diluted wastewater sample). An operating cost analysis was also performed for the selected chemical treatment processes.

scholarly journals Acute and Sub-chronic Toxicity of Condensate Produced From Olive Mill Wastewater Using Solar Energy in Mice

2021 ◽  
Vol 15 ◽  
pp. 4-8
Author(s):  
Bahaa Al-Trad ◽  
Sameh Gharaibeh ◽  
Ameerah Qeshawy ◽  
Mazhar Salim Al Zoubi ◽  
Almuthanna K. Alkaraki ◽  
...  
Keyword(s):  
Body Weight ◽  
Serum Level ◽  
Acute Toxicity ◽  
Chronic Toxicity ◽  
Hematological Parameters ◽  
Weight Ratio ◽  
Olive Mill Wastewater ◽  
Control Group ◽  
Study Results ◽  
Olive Mill

Olive mill wastewater (OMW) is one of the environmental challenges associated with the olive oil industry. This study was carried out to investigate the potential acute and sub-chronic toxicity of oral treatment of OMW condensate in mice. Different doses (250, 500, 1000, 2000, 4000, 8000 mg/kg) were applied once to investigate acute toxicity. Sub-chronic toxicity was investigated using thirty mice; two groups with (500, 4000 mg/kg/body weight) doses along with one control group. Acute toxicity study results showed that the LD50 was greater than the highest tested dose with no signs of systemic toxicity, mortality, or behavioral changes. In addition, the sub-chronic investigation did not show significant changes in behavior, body weight, and vital organs weight/body weight ratio along with no observed differences in the studied hematological parameters. Condensate dose of 500 mg/kg did not show significant differences in the levels of blood urea nitrogen (BUN), alanine aminotransferase and aspartate aminotransferase (AST). However, the AST serum level was significantly decreased and the serum level of BUN was increased at the dose of 4000 mg/kg. Results suggest that single and repeated oral doses of olive condensate administered orally are safe in mice

Energetic valorisation of olive mill wastewater impregnated on low cost absorbent: Sawdust versus olive solid waste

Energy ◽  
2012 ◽  
Vol 39 (1) ◽  
pp. 74-81 ◽  
Author(s):  
Ajmia Chouchene ◽  
Mejdi Jeguirim ◽  
Alain Favre-Reguillon ◽  
Gwenaelle Trouvé ◽  
Gérard Le Buzit ◽  
...  
Keyword(s):  
Solid Waste ◽  
Low Cost ◽  
Olive Mill Wastewater ◽  
Olive Mill
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