The alum sludge which is also known as water treatment residual or waterworks sludge contains high amount of aluminium due to usage of Al compound as the coagulant. Annually about 80,000 tons of the alum sludge waste is produced from water treatment…

Qalamiy â„¢ helps alleviate the writing problems that many special Education students experience.The use of adaptive tools (low -tech aids) can improve the ability to grip a pencil through the intervention of a biomechanical approach.…