Management of hydroxide sludge waste using hygroscopic gravimetric method and physico-chemical characterization

Fantasse, Azeddine; Lakhal, El Khadir; Idlimam, Ali; Kouhila, Mohamed; Berroug, F.; Haloui, Yassine El

doi:10.1016/j.matpr.2020.03.498

Cited by 8 publications

(7 citation statements)

References 14 publications

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“…The management of DWTS is a major challenge due to the increasing volumes, in addition to the potential threat to the environment and acute disposal issues [3,4]. In the drinking water production plant of Marrakech (Morocco) alone, 55 tons of DWTS are generated per day [5].…”

Section: Introductionmentioning

confidence: 99%

Rheological Behavior and Characterization of Drinking Water Treatment Sludge from Morocco

et al. 2023

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Drinking water treatment generates a high amount of pasty by-product known as drinking water treatment sludge (DWTS). The chemical composition, microstructure and rheological behavior of DWTS are of utmost importance in the calculation, design, optimization, commissioning and control of its treatment processes. The purpose of this research was to characterize the DWTS from the drinking water treatment plant of Marrakech (Morocco), aiming to help future researchers and engineers in predicting its hydrodynamic behavior. The first part of this study was devoted to the physical structure and the chemical composition of sludge. The second part was oriented towards the study of the mechanical properties; a penetration test and a rotational rheology test were performed. For the first test, a force–length penetration diagram was plotted in order to calculate the hardness, the cohesiveness and the adhesiveness of DWTS. For the second test, the shear stress and the apparent viscosity were plotted and fitted to five rheological models, as function of the shear rate, aiming to describe the rheological behavior of samples. The obtained results reveal that the drinking water treatment sludge from Marrakech is a porous, amorphous and highly adhesive material, with a shear-thinning (pseudoplastic) rheological behavior that can be described according to the Herschel–Bulkley model (better in low-rate stresses, R² = 0.98) or the Windhad model (better in high shear rates, R² = 0.96) and is mainly composed of silica, aluminum and iron oxides.

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Section: Introductionmentioning

confidence: 99%

Rheological Behavior and Characterization of Drinking Water Treatment Sludge from Morocco

et al. 2023

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“…The used coagulant and flocculant are often the aluminum sulfate and the polyelectrolyte. The reagents injected during treatment generate a large quantity of hydroxide sludge at the end of the cycle [1].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Solar Greenhouse Drying of Hydroxide Sludge under Summer and Winter Climate

Fantasse¹,

Khadir²,

Ali³

2022

Pol. J. Environ. Stud.

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The valorization of the hydroxide sludge, from drinking water treatment plants and solar energy in Morocco, is the main aim of this contribution. In fact, the performance of open and closed solar greenhouse systems were analyzed by comparing with the external and internal meteorological conditions of this greenhouse. The hydroxide sludge from three different sites in the "Marrakech-Safi" region of Morocco was simultaneously dried inside the considered greenhouse. Moreover, the drying kinetic of the samples, during the drying process, was carried out. Based on the drying curves, it was found that the drying time depends on the temperature, higher temperature means shorter time and faster drying speed. In addition, it was revealed that the closed dryer, in the summer season, raises high temperatures and efficiency, and the drying time was reduced compared to the winter season. The moisture content at the end of the process was 71%, the dryness of the sludge was increased from 14.7 to 80%, the characteristic drying curves of the summer and winter periods were made. The cylindrical shape of the samples was constantly measured to follow the shrinkage as well as the geometric reduction of the product.

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“…However, the treatment issue is often not considered in terms of the parameters related to water treatment. Consequently, the daily production rates of the wastewater sludge constituted a potential threat to the environment (Fantasse et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis and Mathematic Modeling of Wastes Sludge from Drinking Water Treatment Plants

Fantasse¹,

Khadir²,

Ali³

2022

J. Ecol. Eng.

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Water treatment annually produces a huge amount of Drinking Water Treatment Sludge (DWTS) wastes. The latter causes environmental problems in Morocco in terms of energy and pollution. Therefore, cost-effective and eco-friendly solutions for managing them should be proposed in order to reduce the frequency of storage along with transportation costs. In this paper, a thermodynamic analysis of DWTS wastes was conducted based on the isosteric heat and compensation theory. Different results concerning the mineralogical identification of sludges were established. Findings revealed that the by-product of water purification was mainly composed of aluminum, silica and iron hydroxides, with pH varying between 6.23 and 6.85. The suspended matter was between 18.3 and 19.6 m/l. The volatile matter of the three sludge samples was between 18 and 21%. The measured dry matter content was between 13.41 and 15.23%. The experimental tests were performed under temperatures from 45 and 60 °C, the experimental data of the sorption curves were fitted by using several models of correlation. Furthermore, the analysis showed that the Peleg's model perfectly described the isotherm curves in the activities ranging from 0 to 90%. The net isosteric heats of sorption of the three hydroxide sludge from the Moroccan treatment station: S k , S m and S s , were determined for desorption and adsorption. Moreover, it was revealed that the equilibrium water content rising lead contributed to the reduction of the net isosteric heat and the entropy of sorption. Finally, the enthalpy-entropy compensation showed that the sorption mechanism involved was enthalpy driven.

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Management of hydroxide sludge waste using hygroscopic gravimetric method and physico-chemical characterization

Cited by 8 publications

References 14 publications

Rheological Behavior and Characterization of Drinking Water Treatment Sludge from Morocco

Rheological Behavior and Characterization of Drinking Water Treatment Sludge from Morocco

Experimental Investigation of Solar Greenhouse Drying of Hydroxide Sludge under Summer and Winter Climate

Thermodynamic Analysis and Mathematic Modeling of Wastes Sludge from Drinking Water Treatment Plants

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