ANALISIS EFEKTIVITAS PENGOLAHAN LIMBAH CAIR PADA PT PERTAMINA REFINERY UNIT V BALIKPAPAN

Abstract

The aim of research are to (1) to know waste water processing at Effl uent Water Treatment Plant Refi nery Unit V Balikpapan, (2) to know the waste water quality each of unit process of EWTP RU V Balikpapan, and (3) to know process cost effectiveness comparing with normal condition and value balance of EWTP RU V Balikpapan. The research has conducted at June 2014 – July 2014 at Effl uent Water Treatment Plant (EWTP) of PT. Pertamina Refi nery Unit V Balikpapan. To know the process of waste water treatment at EWTP RU V Balikpapan is conducted by observing the 11 (eleven) units process such as (1) Refi nery Waste Stilling Zone (RWSZ), (2) Gravity Separator, (3) Equalization Basin, (4) Coagulation Tank,(5) Dissolved Air Flotator, (6) Bio Aeration Basin, (7) Clarifi er, (8) Gravity Head Discharge Chamber, (9) Storm Water Stilling Zone, (10) Storm Water Basin, dan (11) TPI Separator. There are 7(seven) of sample units and some parameters such as BOD (Biochemical Oxygen Demand ), COD (Chemical Oxygen Demand), oli and grease, dissolved sulfi de (H2S), Amoniak (NH3), Phenol Total, temperature, pH dan debit of maximum waste water. The fi nal result of research are BOD=13,7137,COD = 37,7067, oil and grease = 1,6, H2S = unidentifi ed, phenol total = unidentifi ed, Temperature = 29,10c, TDS = 136 mg/l, Debit Max = 500 m3/Hr, Design RainWaste Water = 2400 m3 /Hr). Keywords: wastewater treatment, wastewater, Pertamina