REVIEW AND REDESIGN WASTE WATER TREATMENT PLANT (WWTP) II CHEMICAL UNIT PROCESS AT PT X

• Main Author: Yohana Aruan, Devi
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/36799
• Institution: Institut Teknologi Bandung

The establishing of many industrial centers shows that manufacturing industry in Indonesia is rapidly growing today. PT X is a manufacturer that operates in the automotive sector, known as a multinational company that produces diesel engines, trucks, and buses. The production increase of PT X becomes one of the factors that change the charachteristics of PT X's wastewater. This leads to the condition in which the water released by PT X's WWTP does not meet quality standards. Therefore it is required to conduct an evaluation for every IPAL unit to renew the system. The focus of this evaluation and redesign is the chemical processing, supposedly undergone before biological processing. The evaluation results of the existing WWTP shows that the chemical processing unit does not meet the design criteria and is unable to accommodate planning discharge (1.5 m3/ hour) resulting in overflow from the chemical processing tank. Other problems also come from the operation of WWTP which is not in accordance with the SOP that has been made. This is one of the reasons why the waste water produced does not meet the quality standards. The waste produced by the existing WWTP is 712 mg / L TSS; 1482 mg / L COD; and 472 mg / L BOD. Chemical-physical processing using coagulation, flocculation and clarifier technology was chosen in the re-planning of the initial and first stage wastewater treatment systems. The alternative of the chosen stirring method is the method of mechanical stirring (impeller). This was proposed with an estimate that at that stage it was able to set aside 85-95% of suspended content, 50-70% COD and BOD. Planning to increase the operational time of WWTP to 24 hours per day (continuous) will increase the performance and effluent quality of WWTP.