Valorisation of a bioflocculant and hydroxyapatites as coagulation-flocculation adjuvants in wastewater treatment of the steppe in the wilaya of Saida (Algeria)

Choumane, Fatima Zohra; Benguella, Belkacem; Maachou, Bouhana; Saadi, Nacera

doi:10.1016/j.ecoleng.2017.07.013

Cited by 26 publications

(15 citation statements)

References 32 publications

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“…Furthermore, often the effluent discharge which is improperly treated from wastewater treatment plants (WWTPs) result in major detrimental effects on the health of these surrounding environments and communities situated near sewage or downstream due to worsening physico-chemical parameters and increased microbial pathogens [4]. In the early 20th century, failure to provide large areas and adequate for untreated wastewater disposal, especially in megacities, led to the application of more efficient wastewater treatment methods [5], which took increasingly important at the beginning of the 1970s [6], [7]. Morocco has a semi-arid climate country in the Mediterranean facing scarcity and deteriorating quality of water.…”

Section: Introductionmentioning

confidence: 99%

Coagulation-flocculation technique for domestic wastewater treatment in the city of Ain Aouda, Rabat, Morocco

et al. 2022

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The goal of this study was to investigate the performance of coagulation-flocculation, and sedimentation tests to reduce contaminant concentrations in domestic wastewater to ecologically acceptable levels. The tests were performed at the (ONEE) laboratory using a jar test apparatus (GPB FLCDidatec, France) for enhancing the primary treatment of domestic wastewater effluent from the wastewater plant of Ain Aouda City, Rabat, Morocco. Aluminum sulphate Al2(SO4)3.18H2O (termed alum) was employed as a coagulant in the study. The impact of coagulant doses and pH at optimum dosage on the process of coagulation was studied and conditions were optimized to obtain the best removal of studied pollutants. The evolution of physico-chemical parameters pre-and post-treatment was monitored to determine the efficacy of the process. The turbidity and total suspended solids (TSS) were the best indicators of the treatment’s efficacy of coagulant concentration (150mg/L) within the pH optimum of 7. Laboratory tests have shown 98.4% of turbidity, and 97% total suspended solids removal at initial concentrations of 121 NTU, 220 mg/L respectively. Also, it has shown good removal efficiency for COD, BOD5 of the order 83%, 77% at initial concentrations of 340 mg/L, 150 mg/L respectively. Following the coagulation tests, the examination of the main parameters studied revealed that the degree of contamination had decreased. This is confirmed that Aluminium sulphate as a coagulant has proven its effectiveness in the treatment of domestic wastewater in this study.

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Section: Introductionmentioning

confidence: 99%

Coagulation-flocculation technique for domestic wastewater treatment in the city of Ain Aouda, Rabat, Morocco

et al. 2022

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“…Las propiedades coagulantes de la semilla de Moringa son atribuidas a la presencia de proteínas solubles que actúan como polielectrolito catiónico (Kwaambwa y Rennie, 2011), en tanto que el mecanismo de desestabilización es atribuido a la adsorción y neutralización de cargas (Bongiovani et al, 2014). Diversos investigadores han demostrado su aplicación tanto para la clarificación de agua potable como para el tratamiento de aguas residuales (Keogh et al, 2017;Choumane et al, 2017).…”

Section: Introductionunclassified

Evaluación de la Moringa oleifera en el tratamiento de aguas con alta turbidez y carga orgánica

et al. 2020

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<p>El presente trabajo evalúa la eficiencia del uso de la Moringa oleífera (M.O) como coagulante en el tratamiento de aguas de alta turbidez y carga orgánica. Inicialmente los resultados demostraron que el coagulante a base de las semillas de M.O pre-tratada con cloruro de sodio (NaCl 1.0 N) y usando una dosis de 0.74 g/L, alcanza remociones de 87.3% y 88.8% para turbidez y sólidos suspendidos totales (SST), asimismo valores de 25.9% y 26.3% para DBO5 y DQO respectivamente. En una segunda etapa, el coagulante, sometido a extracción Soxhlet y dosis de 0.5 g/L, muestran máximas eficiencia de 97.8%, 89.99%, 51.4% y 35.3% en la remoción de turbidez, SST, DQO y DBO5. Las más altas eficiencias obtenidas fueron alcanzadas mediante la previa extracción de aceites, grasas y otros componentes de la semilla de M.O. Estudios relacionados al reaprovechamiento de sub-productos de la extracción deben ser realizados.</p>

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“…Several methods have been demonstrated for the treatment of polluted water by different scientists. These methods may include coagulation [1][2], flocculation [3][4], adsorption [5][6], chemical oxidation [7][8] and photocatalytic processes [9][10]. Amongst all these treatment methods, separation of targeted species from wastewater through Emulsion Liquid Membranes (ELM) is also a promising technique.…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of Rupture Analysis for the Optimization of Stable Emulsion Liquid Membrane using DOE Approach

Jamshaid

Bhatti

Qureshi

et al. 2020

Mehran Univ. res. j. eng. technol.

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Rupture of the membrane is considered as one of the most critical characteristics while working on wastewater treatment via emulsion liquid membrane. This paper presents a decisive study of different parameters affecting the rupture of membrane. The potential parameters which are investigated in this study include, surfactant dosage, surfactant concentration, concentration of aqueous phase, emulsification velocity, ratio of organic to aqueous phases and ratio of membrane to feed phases. The Design of Experiment (DOE) approach was used to design the experiments and the results were analyzed statistically through a software Minitab-18. The study revealed that amongst all these parameters, two are the highly significant playing a crucial role in rupture of the membrane. These significant parameters are emulsification velocity and ratio of the organic to aqueous phase. Pareto chart being used as an effective statistical tool implied that the emulsification velocity and ratio of the organic to aqueous phase have negative and positive effects on the response respectively. Using the Response Optimizer tool, the optimum levels of all the potential parameters were statistically calculated followed by an experimental verification resulting a least minimum rupture of 36%. A statistical model was developed in this study and the values of predicted rupture were compared with the experimental results. The calculated correlation coefficient R2 of the developed model was 0.998 and the accuracy of correlation coefficient deduced that the developed model of rupture will precisely calculate the rupture over the range of values.

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Valorisation of a bioflocculant and hydroxyapatites as coagulation-flocculation adjuvants in wastewater treatment of the steppe in the wilaya of Saida (Algeria)

Cited by 26 publications

References 32 publications

Coagulation-flocculation technique for domestic wastewater treatment in the city of Ain Aouda, Rabat, Morocco

Coagulation-flocculation technique for domestic wastewater treatment in the city of Ain Aouda, Rabat, Morocco

Evaluación de la Moringa oleifera en el tratamiento de aguas con alta turbidez y carga orgánica

Parametric Study of Rupture Analysis for the Optimization of Stable Emulsion Liquid Membrane using DOE Approach

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