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In the research, a new dechlorinating agent was prepared, using the activated carbon as the main active component and combining the other cheap raw materials, and the concerned conditions were worked out during the production. The activated carbon derived from sewage sludge was prepared by orthogonal test. Characteristics of the activated carbon from sewage sludge were affected by 3 factors and optimum condition was obtained: 450 degrees C of heating temperature, 30 min of dwell time and 3 M of the concentrations of ZnCl(2) activation. The BET surface area of the activated carbon under optimum conditions is 299.57 m(2)/g which is consistent with the theoretical result of orthogonal design. The optimum formula of the new dechlorinating agent after the researches: 30% of activated carbon, 35% natural minerals 1 and 35% industrial waste 2. And the dechlorinating agent has a breakthrough chlorine content of 21.05%. And XRD analysis of the dechlorinating agent after dechlorination shows that CaCl(2)center dot 4H(2)O is found which means the chemical reaction of the process.
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