Study on a New Dechlorinating Agent Based on Sewage Sludge

An activated carbon derived from sewage sludge was prepared by orthogonal test, and it had a BET surface area of 300.90 m²/g. A new dechlorinating agent using the activated carbon as the main active component was studied. The agent had a breakthrough chlorine content of 19.38% and a saturated chlorine content of 37.32% (under conditions of 200 ¿, 3000 h^-1 space velocity, 0.45~0.90 mm particle size and 5120~5423 mg/m³ input concentration). The effects of space velocity, temperature and particle size on the HCl-removal behavior of the sorbent and the saturation curve ware also studied in this paper.