UPFLOW ROUGHING FILTER IN SERIES AS ALTERNATIVE PRETREATMENT IN WATER TREATMENT PLANT SIWALANPANJI, SIDOARJO, INDONESIAMARITHA NILAM KUSUMA, WAHYONO HADI, NUR INDRADEWI OKTAVITRI, TALENT PRAMESTYAWATI, RACHMANU EKO HANDRIYONO AND RO’DU DHUHA AFRIANISAAbstract Turbidity 2500 NTU produced by raw water of the Buduran River is not able to be processed by Water Treatment Plant (WTP) Siwalanpanji Sidoarjo. It is because the WTP used Siwalanpanji ultrafiltration water treatment only treated turbidity below 100 NTU. therefore, a preliminary process is required to reduce the turbidity which is almost 100 NTU. Processing uses the principle of filtration with the variation of diameter of small to big media is suitable for it. It used gravel filter media in varied diameter for 6 compartments called Upflow Rouhging Filter In Series (UFRS). UFRS is able to reduce 2500 turbidity NTU with an infiltration rate of 1 m/h 95.95%. |