In recent years, the disposal of sewage sludge has been a major concern worldwide because their potential treat in relation with contamination ground water and food chain. Furthermore, poor mechanical properties don’t allow possible direct use civil engineering applications. For these reasons, it was important to explore more opportunity reuse this by-product treatment. frame, solidificationsta...

Nitrogen and phosphorus can cause eutrophication problems in receiving waters. These nutrients can be eliminated by different wastewater treatments but they tend to be costly or require complex operations. With these reasons in mind, this work set out to study the behavior of a novel combined or integrated system with zeolite and lime for the removal of these chemical species. With the integrat...

Background & Aims of the Study: The wastewater created as a result of stone cutting industries enters some pools for re-consumption so that its suspended solids settle by gravity. By taking to account the high volume of water and sludge, treatment of wastewater and removal of sludge cause many problems for stone cutting units. The objective of this study was to determine the quality of wast...

Abstract Sludge effluents and solid deposits generated from the conventional lime treatment processes on Zambian Copperbelt have led to reports of copper (Cu) cobalt (Co) contamination into nearby water bodies. To better understand behaviour metals; partitioning, adsorption their specific binding forms were studied through sequential extraction, batch experiments surface complexation modeling (...

Quicklime is a mixture of pieces different sizes formed after coarse grinding the fried product. According to its chemical composition, it calcium and magnesium oxides, main composition which CaO. In small quantities, may contain undecomposed carbonate, as well silicates, aluminates ferrites magnesium, during interaction clay quartz sand with oxides. ground lime powder product fine lump lime. T...

in order to prevent water losses through disposing hydrous sludge during treatment of water, also recovery and reuse of chemicals; treatment by magnesium carbonate as a coagulant was examined in batch and continuous systems. 600 mg/1 mgco3 as optimum dosage reduced 80% turbidity of a highly turbid water containing 200 ntu. sulfates decreased, but hardness and alkalinity showed some increases. r...

abstract in order to study the chemical behavior of nickel and cadmium in the presence of organic matter, an experiment with two different soils (4 and 30 percent caco3), two different texture (8 and 40 percent clay), two levels of nickel (0 and 100 mg.kg-1), two levels of cadmium (0 and 25 mg.kg-1) and organic matter in the form of sewage sludge in two levels (0 and 100 t. ha-1), at three time...

To assess the chemical stability of sludges generated by neutralizing acid rock drainage (ARD) with alkaline reagents, synthetic ARD was treated with hydrated lime (batch and high-density sludge process), limestone, and two proprietary reagents (KB-1 and Bauxsol). The amorphous metal hydroxide sludge produced was leached using deionized water, U.S. EPA methods (toxicity characteristic leaching ...

Abstract Sludge is one of the by-products wastewater treatment plants (WWTPs). To assist biological processes, part produced sludge returned to process and excess removed from plant whereby it undergoes thickening dewatering. Numerous studies have been conducted investigate effect different coagulants on dewatering sludge, but using divalent iron for this purpose has not investigated so far. In...