| Abstract |
| This research was performed to clarify the mechanisms of nitrogen and phosphorus removal by wood powder and to subsequently provide kinetic parameters for activated sludge process. Mixed powder was added directly to the aeration basin in the activated sludge process. The COD and phosphorus removals in the reactor were increased by 10 ～20%, 50～60%, respectively. Addition of the mixed powder achieved over 80% on nitrogen removal. Dewaterability of the sludge was determined by measuring the capillary suction time(CST). The sludge produced from the process with the mixed powder exhibited improved dewaterability, which was probably due to the conditioning effect of FeCl3 solution used in preparation of the mixed powder. The heat of sludge was also increased from 3,642kcal/kg to 5,748kcal/kg by the addition of the powder to the activated sludge process. The result of activated sludge system operation provided an evidence that the addition of wood powder to the system could enhance the overall treatment efficiency. |
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| Key Words |
| Wood powder, mixed powder, activated sludge process, nitrogen removal, phosphorus removal, capillary suction time, heating value of sludge |
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