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하수처리시설에서 인 고도처리를 위한 자동제어시스템 개발에 관한 연구
김선국 ( Seon Gok Kim ),이호식 ( Ho Sik Lee ),전태성 ( Tae Sung Jun ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.2
It has a limitation to satisfy the phosphorus effluent criteria of 0.2 mg/L which will be reinforced from 2012 with the Biological Nutrient Removal (BNR) process. The chemical coagulation process has been operated in parallel with the biological treatment process for advanced treatment of phosphorous in the developed countries including Europe. However, the coagulation process has some disadvantages such as the desired goal may not be achieved without injecting the optimum dosage of the coagulant. This study developed the automatic control system to inject the optimum dosage of phosphorous coagulant into the coagulation process. The adopted coagulant was 10% Poly Aluminum Chloride (PAC) in this study. The automatic control system developed in this study was adopted for the treatment of the phosphorus from the effluent in SBR process. The automatic control system was composed of the data receiving part, the optimum coagulant dosage control part and the data transmit part. The result of the phosphorous advanced treatment of the SBR effluent using the automatic control system showed the removing efficiency over 95% consistently with the phosphorous concentration under 0.02~0.15 mg/L. The reproducibility analysis for checking the safety of automatic control system showed more than 95% correlation.
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