Adsorbent of Sewage Sludge: Preparation and Its Adsorption Properties

Modified adsorbent of sewage sludge was studied by drying and immersing sludge in activated solution at various concentrations and pyrolyzing at various temperatures for different hold times. Organic composition and specific surface area of adsorbent were determined with optimal condition of preparation by orthogonal design. Results showed that at the optimal condition of the ratio of sludge to activated solution 5:3, pyrogenation 60 min under 550℃, the modified sludge adsorbent has the biggest specific surface area. By comparing with the commodity activated carbon, the adsorption capacity of modified absorbent is smaller than that of activated carbon.