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Biomass is an attractive energy source that can be used for production of heat, power, and transport fuels and when produced and used on a sustainable basis, can make a large contribution to reducing greenhouse gas emissions. Anaerobic digestion (AD) is a suitable technology for reducing organic matter and generating bioenergy in the form of biogas. This study investigated the factors allowing the optimization of the process of biogas production from the digestion of wheat straw (WS). The statistical analysis of the experiments carried out showed that ultrasonic processing plays a fundamental role with the sonication density and solids concentration leading to improved characteristics of WS, reducing particle size, and increasing concentration of soluble chemical oxygen demand. The higher the sonicating power used, the more the waste particles are disrupted. The optimality obtained under mesophilic conditions for WS pretreated with 4% w/w (weight by weight) H2O2 at temperature 36 °C under 10 min of ultrasonication at 24 kHz with a power of 200 W improves the methane yield by 64%.
Yasmine Ouahabi; Kenza Bensadok; Abdeldjalil Ouahabi. Optimization of the Biomethane Production Process by Anaerobic Digestion of Wheat Straw Using Chemical Pretreatments Coupled with Ultrasonic Disintegration. Sustainability 2021, 13, 7202 .
AMA StyleYasmine Ouahabi, Kenza Bensadok, Abdeldjalil Ouahabi. Optimization of the Biomethane Production Process by Anaerobic Digestion of Wheat Straw Using Chemical Pretreatments Coupled with Ultrasonic Disintegration. Sustainability. 2021; 13 (13):7202.
Chicago/Turabian StyleYasmine Ouahabi; Kenza Bensadok; Abdeldjalil Ouahabi. 2021. "Optimization of the Biomethane Production Process by Anaerobic Digestion of Wheat Straw Using Chemical Pretreatments Coupled with Ultrasonic Disintegration." Sustainability 13, no. 13: 7202.
The present work is devoted to the salinity abatement of the groundwater desalination RO concentrate, and the study of its possible reuse. As NO3− and some of its by-products represent the highest risk for the environnment, its removal has been studied to optimize some operating parameters. Firstly, to ensure sufficient solution conductivity and to avoid the inhibitory and interactions effect of other ions present in the concentrate, EC experiments were carried out with synthetic solutions containing only Cl− and SO42− ions. The results showed that at the optimal conditions (Al/Al, 100 A/m2, pH 7 and 180 min), the NO3− removal reached 93%. Secondly, to study their inhibitory effect on NO3- removal, the coexisting ions (Cl−, SO42−, HCO3−, K+, Mg2+, Ca2+, Na+ and F−) were added successively until obtaining a synthetic solution representing the real concentrate. The study showed that SO42−, HCO3− and Ca2+ ions are the main species that inhibit the NO3− elimination. Otherwise, the mechanism showed that NO3- was eliminated by both adsorption and chemical reduction to ammonium NH4+. Also, no nitrite NO2− and no ammonia NH3 were detected. Finally, optimal conditions applied to the synthetic and real RO concentrate, led to very significant decrease in ions concentration. In the case of the real RO concentrate, the ions abatement attained 62.00, 30.33, 42.49, 29.12, 83.23, 31.74, 27.59 and 69.20% respectively for NO3-, Cl-, SO42-, K+, Mg2+, Ca2+, Na+ and F-. As the final concentrations of all ions were close or less than to those contained in the raw groundwater, and to preserve the Albien resource, the treated concentrate could be recycled upstream of the RO process.
Ismahane Berkani; Mohamed Belkacem; Mohamed Trari; François Lapicque; Kenza Bensadok. Assessment of electrocoagulation based on nitrate removal, for treating and recycling the Saharan groundwater desalination reverse osmosis concentrate for a sustainable management of Albien resource. Journal of Environmental Chemical Engineering 2019, 7, 102951 .
AMA StyleIsmahane Berkani, Mohamed Belkacem, Mohamed Trari, François Lapicque, Kenza Bensadok. Assessment of electrocoagulation based on nitrate removal, for treating and recycling the Saharan groundwater desalination reverse osmosis concentrate for a sustainable management of Albien resource. Journal of Environmental Chemical Engineering. 2019; 7 (2):102951.
Chicago/Turabian StyleIsmahane Berkani; Mohamed Belkacem; Mohamed Trari; François Lapicque; Kenza Bensadok. 2019. "Assessment of electrocoagulation based on nitrate removal, for treating and recycling the Saharan groundwater desalination reverse osmosis concentrate for a sustainable management of Albien resource." Journal of Environmental Chemical Engineering 7, no. 2: 102951.