PENYISIHAN COD, TDS DAN AMMONIA (NH3-N) PADA AIR TERPRODUKSI DENGAN KOMBINASI PROSES FILTRASI, AERASI DAN ELEKTROKIMIA MENGGUNAKAN ELEKTRODA Al-Fe

The activities of oil and gas industry have a potential to cause pollution for environment. This pollution can arise due to production process, petroleum processing, storage and industries that use petroleum. Produced water is the largest liquid waste generated by these activities. The number will increase as long as a field where exploration continues to produce. In this study, electrochemical method using Al-Fe electrodes with addition of 1 g/L NaCl as agent to process of providing chlorine as an oxidation mediator to accelerate NH3-N removal in produced water. The voltage variations during process were 3, 6, 9 and 12V. This process is continuous and samples are taken every 45, 90, 135, 180 and 225 minutes. The results showed percentage of overall COD removal is 46.57%, ammonia (NH3-N) removal is 96.26% and TDS removal is 48.85% . 9V for 225 minutes during electrochemical process is optimum condition that can reduce contaminants in produced water so the quality standards of Minister of Environment Regulation No.19 2010 fulfilled. Electrochemical method was chosen in produced water treatment because the equipment required is simple and easy to operate also doesn’t cause a new waste.