DESIGN OF COAGULATION, FLOCCULATION, AND SEDIMENTATION UNIT AT SADU WATER TREATMENT PLANT STAGE II, BANDUNG REGENCY

• Main Author: Fadhilezar, Almer
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/51261
• Institution: Institut Teknologi Bandung

The need for access to clean water that continues to increase is not accompanied by available production capacity. Based on the SDG's target and the 100-0-100 program as seen in the 2020-2024 RPJMN, it states that access to clean water for urban areas must reach 100%. However, in 2019, service coverage in the Bandung Regency area was only 28.89% with an air loss rate of 27.01%. So it is necessary to develop an optimal Drinking Water Supply System (SPAM) through the construction of a Sadu Water Treatment Plant (IPA) with a capacity of 400 lpd. The planning of the Sadu IPA is divided into two stages of development, with a duration of ten years for each stage. In phase I, an IPA with a capacity of 250 lpd was built. Meanwhile, the second phase will be built an IPA with a capacity of 150 lpd right in the location of the IPA phase I, with an area of 3,947 m2. The source of raw water comes from the Cisondari River with an average discharge of 700 lpd. The IPA is planned to serve three sub-districts, namely Kutawaringin, Margahayu, and Margaasih. Based on secondary data, the results of air quality analysis, turbidity parameters, fecal coliform, total coliform, and phenol do not meet the quality standards for drinking water quality based on Government Regulation Number 82 the Year 2001 and Minister of Health Regulation No. 492. In processing settings, these parameters are analyzed based on references Kawamura (1991), Crittenden, et al. (2012), and JICA's Prediction Model (1990). And a conventional processing process consisting of coagulation, flocculation, sedimentation, filtration, disinfection, and reservoir processes. However, the focus of the design in this final project is the coagulation, flocculation, and sedimentation unit. The method of selecting each alternatif processing unit uses Simple Additive Weighting (SAW) without value normalization. The selected processing in the coagulation unit uses hydraulic stirring in the form of a waterfall, the flocculation unit uses a hydraulic baffle with a hexagonal channel, and the sedimentation unit uses a rectangular tank with high speed (tube settler). The installation will also be equipped with a supporting building in the form of housing, chemicals, office, workshop, operator's room, and laboratory.