Article
Biotechnology & Applied Microbiology
E. Jimenez-Paez, A. Serrano, J. Purswani, D. Correa-Galeote, J. Cubero-Cardoso, F. G. Fermoso
Summary: The adaptability of the microbial community in the anaerobic fermentation process of olive mill solid waste (OMSW) was found to be correlated with the production of VFAs under different pH conditions. Neutral conditions led to minimal VFA accumulation, while acidic conditions resulted in a more complex VFA profile and a shift in microbial composition. Alkaline conditions exhibited higher VFA accumulation, primarily in the form of acetic acid.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Agricultural Engineering
Cheau Chin Yap, Soh Kheang Loh, Yi Jing Chan, Christina Vimala Supramaniam, Mei Fong Chong, Aik Chin Soh, Lian Keong Lim, Lian Siang Loo
Summary: Co-digestion of Moringa Oleifera extract with POME can improve the removal efficiency of suspended solids and oil and grease in wastewater, forming an immobilization medium for better digestion, leading to a significant increase in methane production.
BIOMASS & BIOENERGY
(2021)
Article
Engineering, Environmental
Cristina Agabo-Garcia, Guillermo Repetto, Mha Albqmi, Gassan Hodaifa
Summary: Different eco-friendly processes were studied to treat olive mill wastewater for the European 2024 zero-waste plan. The application of advanced oxidation processes, flocculation, and filtration proved to be effective in obtaining high-quality regenerated water. However, the increase in total iron content resulted in toxicity, which was resolved through subsequent flocculation and filtration steps. The optimized process achieved regenerated water suitable for irrigation with improved quality parameters.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Sumera Shabir, Noshin Ilyas, Maimona Saeed, Fatima Bibi, R. Z. Sayyed, Waleed Hassan Almalki
Summary: Olive mill wastewater (OMW) generated by olive oil production contains high levels of salt, organic matter, suspended particles, and toxic chemicals (especially phenols), which leads to increased biological and chemical oxygen demand. However, after pretreatment and treatment processes, OMW can have positive effects on plant development due to its high mineral content and organic matter. Evaluating the effects of treated and untreated OMW on soil fertility can provide insights into its potential role in increasing soil productivity.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
J. A. Saez, M. D. Perez-Murcia, A. Vico, M. R. Martinez-Gallardo, F. J. Andreu-Rodriguez, M. J. Lopez, M. A. Bustamante, J. C. Sanchez-Hernandez, J. Moreno, R. Moral
Summary: The study compared the effects of composting and vermicomposting on the potential toxicity of sediments derived from long-term stored olive mill wastewater (OMW). Results showed that composting assisted with earthworms was more effective in reducing the ecotoxicity of OMWS, especially during the maturation stage. Vermicomposting was also effective in reducing OMWS salinity, but a pre-composting process was necessary to provide suitable conditions for earthworms.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Chaima Saf, Laurence Gondet, Maud Villain-Gambier, Majdouline Belaqziz, Dominique Trebouet, Naaila Ouazzani
Summary: Agricultural applications of olive mill wastewater (OMW) present a challenge in waste recycling and sustainable agriculture. An integrated study on the applications of OMW from the UF-NF process was conducted, with UF retentate and NF permeate studied for fertilization and irrigation potential, and NF retentate studied as a bioherbicide.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Georgios Manthos, Dimitris Zagklis, Melina Papapanou, Constantina Zafiri, Michael Kornaros
Summary: The increasing production of agro-industrial organic residues, particularly in the production of olive oil, poses a serious environmental concern. In this study, composting of olive pomace, olive leaves, and dewatered anaerobic sludge was conducted, and the best results were obtained with a 95:5% ratio of olive pomace to olive leaves. However, the final product did not meet the compost quality criteria in terms of E. coli levels, suggesting the need for further improvement.
Article
Engineering, Chemical
Patrick Tai, Ruth Spierling, Jennifer Carroll, Stephanie Jung
Summary: Olive cake, a byproduct of olive oil production, has high organic and polyphenol content, making it a potential environmental threat and limiting its use as animal feed. However, it can be a good source for biomethane production due to its polysaccharide content. This study compared two strategies to maximize biomethane production and found that both enzymatically pretreated and destoned olive cakes produced similar amounts of methane. The digestate recovered from anaerobic digestion of olive cake also has potential as a soil amendment.
Article
Environmental Sciences
Fatima Elayadi, Mounia Achak, Wafaa Boumya, Noureddine Barka, Edvina Lamy, Chakib El Adlouni
Summary: This research aims to optimize the removal of phenolic compounds from Olive Mill Wastewater (OMW) using sawdust and red clay as natural adsorbents. The study found that the adsorbent dose has the most significant influence on polyphenol removal for both adsorbents. The temperature and choice of red clay also affect the removal efficiency. Additionally, OMW was found to have a phytotoxic effect on seed germination.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Fatima Elayadi, Mounia Achak, Wafaa Boumya, Noureddine Barka, Edvina Lamy, Chakib El Adlouni
Summary: This study aimed to optimize the removal of phenolic compounds from Olive Mill Wastewater (OMW) using sawdust and red clay as natural adsorbents. The experimental conditions were optimized using a fractional factorial experimental design, and the most significant factors affecting polyphenol removal were determined. The results showed that both sawdust and red clay were effective in removing polyphenols from OMW, and the maximum removal was achieved at specific temperature, pH, adsorbent dose, reaction time, and agitation speed. Furthermore, the study also investigated the phytotoxicity effect of untreated OMW on durum wheat and white bean seed germination, and found that treatment with red clay followed by dilution significantly improved the germination rate of both crops compared to treatment with sawdust.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Nozha Abid, Fatma Karray, Imen Kallel, Mariam Slim, Abdellatif Barakat, Najla Mhiri, Mohamed Chamkha, Sami Sayadi
Summary: This study investigated the impact of biochar addition on anaerobic digestion of olive mill wastewater with different initial chemical oxygen demand loads. It was found that adding biochar increased methane yield and mitigated volatile fatty acid accumulation. Additionally, biochar supplementation improved microbial community diversity and abundance of potential genera involved in direct interspecies electron transfer. These findings suggest that biochar could be a promising alternative for improving anaerobic digestion of olive mill wastewater at a large scale.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Environmental
Mounia Achak, Wafaa Boumya, Sabah Elamraoui, Nouhaila Asdiou, Nawal Taoufik, Noureddine Barka, Adil Aboulkas, Edvina Lamy
Summary: Olive mill wastewater (OMWW) is a major source of harmful and hard-to-degrade organic pollutants. This study evaluated the performance of a sand filtration and vertical flow constructed wetlands (VF-CWs) system in reducing the organic load of OMWW. The results showed that the combination of sand filter and VF-CWs significantly improved the removal efficiency of total COD, dissolved COD, and phenolic compounds.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Agricultural Engineering
Georgios Manthos, Dimitris Zagklis, Constantina Zafiri, Michael Kornaros
Summary: Olive mill wastewater is a significant waste stream in Mediterranean countries and its uncontrolled disposal causes environmental issues. This study evaluates the environmental impact of anaerobic digestion of three-phase olive mill wastewater for energy production. The results show that the proposed method outperforms baseline scenarios, but digestate utilization raises concerns about terrestrial acidification and water eutrophication.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Mohamed Aboelfetoh, Amro Hassanein, Mohamed Ragab, Mohamed El-kassas, Ezzat R. Marzouk
Summary: This study investigated the renewable energy and digestate qualities produced from olive mill waste (OMW) treatment using anaerobic digestion (AD) at different temperatures and ratios with dairy manure (DM). The results showed that a mixture of OMW, DM, and inoculum (IN) at 55 degrees C produced the highest methane yield, and the concentration of the digestate also affected faba bean growth.
Article
Green & Sustainable Science & Technology
Georgios Manthos, Dimitris Zagklis, Vasiliki Papavasileiou, Nektaria Anastasia Gkountou, Zinovia Saita, Constantina Zafiri, Michael Kornaros
Summary: Olive mill effluents are a significant waste stream in Mediterranean countries and their uncontrolled disposal without treatment has adverse environmental and social impacts. Anaerobic digestion has been extensively researched for treating various waste streams, and its advantages include energy and fertilizer production. This study optimized the organic loading rate of anaerobic UASB digesters processing olive mill effluents, reaching a maximum of 5-6 gCOD/LR/d without pretreatment. The acclimatization of inoculum to the effluents also improved phenols degradation inside the reactor to 59%.
Article
Energy & Fuels
Ghizlane Enaime, Abdelaziz Bacaoui, Abdelrani Yaacoubi, Marc Wichern, Manfred Luebken
Summary: In this study, the OS filter bed used for filtering OMWW was converted into solid biofuel through HTC, with hydrochars prepared at 240 and 300 degrees C showing promising fuel properties. The temperature of 240 degrees C was chosen as optimal for producing hydrochar with enhanced biofuel properties and lower energy consumption for treating OMWW/OS-FR. Compared to LTP, HTC proved to be more energy-efficient for managing moisture in OMWW/OS-FR.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
A. Mellalou, A. Mouaky, A. Bacaoui, A. Outzourhit
Summary: This study compared the performances of different greenhouse shapes in the climatic conditions of Marrakech, Morocco, finding that uneven-span greenhouses in an east-west orientation are the most suitable.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Mohammed Derqaoui, Imane Aarab, Abdelmoughit Abidi, Abdelrani Yaacoubi, Khalid El Amari, Abderahman Etahiri, Abdelaziz Bacaoui
Summary: Moroccan unexploited seaweeds biomass could be a potential eco-friendly and efficient depressant in the green selective flotation of apatite.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Chemistry, Multidisciplinary
M. Mikali, A. Barbouchi, R. Idouhli, A. Abouelfida, A. Yaacoubi, I. Benzakour, H. Faqir, A. Boulaamail, A. Bacaoui
Summary: The study focuses on electrochemical phenomena induced by sulfide minerals during silver cyanidation. The electrochemical behavior of silver electrode in cyanide solution was studied first to explain the mechanism of silver dissolution. The optimal conditions for silver dissolution were identified by investigating the effect of oxidants type and cyanide concentrations. Cyanidation tests were conducted in the presence and absence of sulfide minerals (chalcopyrite, sphalerite, and galena), and the results revealed that the limitation of silver cyanidation can be attributed to passivation phenomenon in galena, galvanic interaction in sphalerite, and overconsumption of available free cyanide due to liberated copper ions in chalcopyrite. The impact of sulfide minerals on silver dissolution varies in the order: chalcopyrite > galena > sphalerite.
Article
Engineering, Environmental
Max Stricker, Tobias Littfinski, Klaus Hans Pecher, Manfred Luebken, Marc Wichern
Summary: The development of compact treatment devices (CTDs) with high removal efficiencies and low space requirements is a key objective in urban stormwater treatment. This study determines the removal efficiency of sedimentation and the expected filter load in a specific CTD designed for a catchment area of up to 10,000 m(2) using small-scale physical hydraulic modeling. The results show the importance of sedimentation upstream of a filter in CTDs.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Imane Aarab, Khalid El Amari, Abdelrani Yaacoubi, Abderahman Etahiri, Abdelaziz Bacaoui
Summary: Phosphate ores are important raw materials for phosphate fertilizers, but high-grade reserves are depleting. This study optimizes the flotation process of a low-grade phosphate ore, finding an effective formulation to achieve high P2O5 grade and recovery rate.
MINING METALLURGY & EXPLORATION
(2023)
Article
Engineering, Environmental
Salahaldeen Dababat, Stephan Berzio, Marc Wichern, Manfred Luebken
Summary: There is a growing interest in integrating aerobic granular sludge (AGS) technology into wastewater industries. While there are several projects on cultivating aerobic granules for continuous flow reactors (AGS-CFR), there is a scarcity of projects investigating bio-energy recovery from AGS-CFR. This research aims to examine the digestibility of AGS-CFR and the role of granule size on their digestibility. BMP tests were conducted at mesophilic conditions, showing that AGS-CFR has a lower methane potential compared to activated sludge, possibly due to the high sludge age. The average size of granules is a key factor in reducing their digestibility, with larger granules yielding significantly less methane than smaller ones.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
J. Heinrichmeier, Tobias Littfinski, Ekaterina Vasyukova, Leon Steuernagel, Marc Wichern
Summary: The reliability of a microbial fuel cell (MFC) system on an industrial scale was tested in a 1,000-litre single-chamber system at a municipal wastewater treatment plant (WWTP). The use of submergible multi-electrode modules with largescale grid-segmented gas diffusion cathodes with activated carbon as a catalyst resulted in power densities above 100 mW m(Cat)(-2). Fluctuating chemical and physical wastewater characteristics had reversible effects on the MFC performance in terms of energetic efficiency.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Carolin Wehrheim, Manfred Luebken, Harro Stolpe, Marc Wichern
Summary: Urbanization, industrialization, and the loss of freshwater resources have led to an increased awareness of the importance of surface water quality worldwide. The Vietnamese Mekong Delta is facing pressure on the availability of freshwater sources due to limited ground water resources, prolonged droughts, and flooding. This study identified freshwater aquaculture and industrial activities as the main factors influencing surface water pollution in the delta region.
Article
Engineering, Chemical
Pascal Kosse, Tanja Hernandez Rodriguez, Bjoern Frahm, Manfred Luebken, Marc Wichern
Summary: Visual Water is a powerful software tool that allows accurate pH calculations and automated mathematical uncertainty analysis, showing reliable performance in complex acid-base solutions.
CHEMIE INGENIEUR TECHNIK
(2023)
Article
Chemistry, Multidisciplinary
Ramineh Rad, Tito Gehring, Kevinjeorjios Pellumbi, Daniel Siegmund, Edith Nettmann, Marc Wichern, Ulf-Peter Apfel
Summary: Hybrid electrochemical and biological systems using wastewater as the catholyte have the potential to bring bioelectrochemical methanogenesis closer to practical implementation. A zero-gap cell with a porous transport layer in the cathode is developed specifically for operating with a wastewater-fed methanogenic reactor. In-depth analysis of the electrode composition shows a significant variation in current density depending on the binder and carbon black contents. This hybrid system, equipped with a robust pentlandite-type cathode catalyst, Fe3Ni3Co3S8, produces methane over 220 days with a maximal weekly average rate of 669 LN m-2cathode d-1. The average current density sustained by the entire hybrid system is 30 mA cm -2 at a 2.2 V set potential.
CELL REPORTS PHYSICAL SCIENCE
(2023)
