고화처리 하수슬러지의 CO2 흡착특성

Abstract

In order to evaluate the utilization validity of solidified sewage sludge as a cover soil for landfill, the characterization for crystallinity, morphology, surface area, and pore structure has been carried out by means of XRD, SEM, and BET, and the adsorption characteristics of CO2 on sewage sludge that was solidified with converter slag, fly ash, and quicklime were investigated.The surface area was increased 2-4 times after solidification, especially, solidified sewage sludge including 10% quicklime was most. The amount of CO2 adsorbed was increased in proportion to surface area of solidified sewage sludge. The maximum adsorption amount of CO2 was 6.0 mg for the solidified sewage sludge including 10% quicklime and 4.9 mg for the 10% quicklime and 40% slag added one at 40 , 3 atm, respectively. The adsorption amount was increased 2 times after solidification. As the mixing amount of quicklime added more, adsorption amount became larger, so adsorption amount was affected by quicklime.