| dc.description.abstract | Research has been done to decrease ammonia (NH3) by electrocoagulation method. The purpose of this research is to decrease the ammonia (NH3) level in hospital liquid waste. Research with electrocoagulation method is done with several variations of voltage, time and electrolytes to know the most optimum voltage, time and electrolyte. A series of electrochemical devices equipped with cathodes and anodes. As the cathode is used carbon, while the anode is used aluminum. The electrodes prior to use are characterized by scanning electron microscope-electron dispersive spectrometer (SEM-EDS). The electrocoagulation results were analyzed using a UV-Vis spectrophotometer at 645 nm wavelength. Level of ammonia before electrocoagulation process was 63,28 ppm and after the best result electrocoagulation was 22,88 ppm. The results showed that the optimum electrocoagulation condition at time and voltage was 5 V with 60 minutes time of 20.29%, time 30 minutes with a 5 V voltage of 50.43% and a good electrolyte used for electrocoagulation method was 0.1 N NaOH with Present ammonia decrease 47.25%. Electrocoagulation method with C and Al electrode can decrease ammonia level although not yet fulfill the standard of hospital activity quality standard 0,1 mg / L | en_US |
