RISK ANALYSIS ON WATER SAFETY PLAN (WSP) SOURCE (Case Study : Dago Pakar WTP, PDAM Tirtawening, Bandung)

• Main Author: SRI WIDARTI , PAULINA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23666
• Institution: Institut Teknologi Bandung

Dago Pakar Water Treatment Plant (WTP), PDAM Tirtawening use raw water sources from Cikapundung River (through Bantarawi intake), where the condition of the river now much decreased in terms of both quality and quantity. Cikapundung river are polluted by livestock waste, and domestic, especially those from the Upper River region of Cikapundung river. These conditions lead to increased processing load on WTP, thus resulting in increased production costs incurred by Dago Pakar WTP. WTP load increases due to increasing the use of coagulants (PAC) with different types of PAC and purchase price. Therefore, it is necessary to research on risk assessment study on the processing units as a result of changes in quality (turbidity, BOD, color, pH, DO and TOC) and quantity of raw water source. The approach of ecological risk analysis method is use for this study. The result of the identification shows a strong correlation between the turbidity of livestock waste and rain events with the use of powder coagulant (kg). The Spearman correlation coefficient are 0.795 and 0.766 with significance value are 0.000 (p < 0.05) respectively. The total risk value is classified as high risk. The total risk value is 6.48% of the average of the water selling price or Rp287.36/m3 production capacity. The results of the Crystal Ball program forecasting using scenario analysis with 1 – 10 % percentile data show that total risk value for the 1 % percentile is 5.65% of the average of the water selling price (high risk) or Rp250.79/m3 production capacity and for the 10 % percentile is 6% of the average of the water selling price (very high risk) or at Rp266.33/m3 production capacity.