印度尼西亞Purwakarta城市的纖維公司所排放的高濃度亞硫酸鹽和次氯酸鹽廢水一直以來被認為是導致當地污水處理廠出水水質不佳的原因。為了確定廢水處理的亞硫酸鹽和氯的濃度限制，本研究使用Minitab 16模式分析了入流水的亞硫酸鹽及氯化物濃度與廢水處理效能之間的關係。廢水處理效能以一系列的關鍵水質參數做評估，包括化學需氧量（COD），生物需氧量（BOD），混合液懸浮固體（MLSS）和混合液體揮發性懸浮固體（MLVSS）。此外，還評估了COD和BOD排放的邊際減排成本（MAC）。結果發現，亞硫酸鹽濃度的可接受範圍為4483.19至5237.085 mg/L之間，氯濃度的極限範圍則為0.27至0.31 mg/L之間。至於MAC的減排成本，1 mg/L的COD估計為Rp.55,849.14，而BOD則為Rp.55,845.51。本研究的成果可作為未來廢水處理廠審查和修訂的參考。;Elevated concentrations of sulphite and hypochloride released from fiber industry have been considered the factors to cause poor effluent water quality of the wastewater treatment plant in Purwakarta, Indonesia. To determine the concentration limit of sulphite and chlorine for the wastewater treatment, in this study we analyzed the association between the influent sulphite or chloride concentration and the performance of the wastewater treatment by using Minitab 16 programs. A suite of key water quality parameters including Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Mixed Liquor Suspended Solids (MLSS) and Mixed Liquor Volatile Suspended Solids (MLVSS) were included in the analysis. In addition, Marginal Abatement Cost (MAC) from COD and BOD emission was assessed. It was found that the acceptable range for sulphite concentrations was 4483.19 mg/L to 5237.085 mg/L and the limit range of chlorine concentrations was 0.27 – 0.31 mg/L. The estimated abatement cost of MAC for 1 mg/l COD parameter was Rp.55, 849.14 and for that of BOD was Rp.55, 845.51. This study may serve as a reference for future review and revision of the Wastewater Treatment Plant.
