Characterization And Recycling Of Textile Sludge Through Energy Efficient Brick Production The Case Of Hawassa Industrial Park

Textile industry sludge from zero liquid discharge treatment plant of industrial parks inrnEthiopia faces environmental problem with no safe disposal options. One potentialrnopportunity for the disposal of sludge is by incorporating it in clay bricks, suchrnapplication can be practiced in a large scale in the country's brick-manufacturingrnindustry. Clay bricks were prepared with different proportions of sludge (10, 20, 30 andrn40% by weight) in laboratory conditions and its properties such as strength, waterrnabsorption, and weight loss on ignition were investigated. Results indicated thatrnincreasing the sludge content in bricks resulted in a decrease in compressive strength.rnHowever, the compressive strength was increased with the increase of firing temperature.rnThe compressive strength of textile sludge bricks was reduced significantly from 30.42 torn2MPa when textile sludge content increased from 0% to 40% fired at 1200 oC. Moreover,rnit was estimated that an energy saving of 38% was achieved with 10% textile sludgernincorporated bricks during firing; this is due to the heating value of the textile sludge.rnToxic characteristics leaching procedure test results indicated that the leaching behaviorrnof targeted heavy metals has been found to be insignificant (P

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