Élimination des phosphates par filtration directe sur lit de sable

Kellil, Amara; Bensafia, D.

doi:10.7202/705510ar

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Sand filters are natural environments that can be used as filter beds in wastewater treatment (Saad et al, 2009;Jianmin et al, 2003), by playing a dual role: retaining suspended matter and fixing the biomass that develops around the grains, which biodegrades organic, phosphorus and nitrogen pollution (Monroe et al, 2002;Kellil and Bensafia, 2003).…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Two Types of Sand Used for Wastewater Treatment (Case of Algerian Sahara)

Rezagui,

Hafida,

Lamia

et al. 2024

Ecol. Eng. Environ. Technol.

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Filtration is one of the oldest techniques and by far the most widely applied in water treatment operations. It is considered one of the most effective methods for purifying waste water. Sand filtration consists of passing water loaded with suspended and colloidal matter through a filtering material in order to clarify it. In Ouargla region, wastewater is evacuated in a closed system without any treatment, which presents a natural risk to public health and endangers the sustainability of agriculture and the environment. In this modest study, two sand samples of different grain size and shape were used as the filter bed. Several filters were constructed using two types of sand with the same dimensions and different characteristics. The filter was exposed to clogging during the operation, which is prejudicial to the filtration process. For this reason, our study aims to see the influence of the type of sand on this process and analyze the phenomenon of filter clogging: the causes of its appearance, its types and their location as well as the parameters governing it. The most important thing is to evaluate the quantity of organic matter deposited in the different layers of the filter, and see its distribution as a function of time over the whole the depth of the filters. This study shows that the sand filter is subjected to progressive clogging. This clogging is classified into three fragments: mechanical, physical and organic. The study showed that the finer the granulometry, the greater the accumulation of organic matter. From the third week onwards, the formation of a biological film has been observed, which allows for very thorough purification. In other words, a quantity of suspended matter settles as the biomass degrades the organic matter.

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Section: Introductionmentioning

confidence: 99%

Comparative Study of Two Types of Sand Used for Wastewater Treatment (Case of Algerian Sahara)

Rezagui,

Hafida,

Lamia

et al. 2024

Ecol. Eng. Environ. Technol.

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“…Excessive phosphorus content in receiving waters leads to heavy growth of algae (eutrophication). The phenomenon of eutrophication generally leads to deterioration of water quality [3] and consequently can significantly increase the cost of water treatment in surface water treatment plants. Phosphate loading to receiving waters originates from various sources.…”

Section: Introductionmentioning

confidence: 99%

Removal of Phosphates in Aqueous Solution by Adsorption on Calcium Oxide

et al. 2022

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The aim of this work is the removal of phosphates from an aqueous solution by adsorption on a new, inexpensive adsorbent, calcium oxide. We have also shown interest in the choice of removal method, which is adsorption. The kinetic study of the removal of phosphate ions by adsorption on calcium oxide allowed us to calculate the value of adsorption capacity as a function of the parameters affecting adsorption: Amount of adsorbent, initial concentration of phosphate ion solution, pH of the mixture and temperature. The study of adsorption isotherms showed that the Freundlich model is the most appropriate for the phenomenon of phosphate ion adsorption. Modeling of the kinetic data by the pseudo-first order and pseudo-second order equations shows that the adsorption process is best described by the second order equation. Thermodynamic parameters such as enthalpy ΔH°, entropy ΔS° and free enthalpy ΔG° were also evaluated to determine the nature of adsorption. The results show that the adsorption process is a spontaneous and endothermic physisorption.

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Élimination des phosphates par filtration directe sur lit de sable

Cited by 2 publications

References 4 publications

Comparative Study of Two Types of Sand Used for Wastewater Treatment (Case of Algerian Sahara)

Comparative Study of Two Types of Sand Used for Wastewater Treatment (Case of Algerian Sahara)

Removal of Phosphates in Aqueous Solution by Adsorption on Calcium Oxide

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