HOTEL'S DOMESTIC WASTEWATER (GREY WATER) REUSE BY ELECTROCOAGULATION USING A PAIR OF ALUMINUM ELECTRODES

• Main Author: NUR (NIM : 25312028), ANSIHA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21158
• Institution: Institut Teknologi Bandung

The potential use of recycling of grey water to non potable water in order to reduce water usage in the hotel area requires large amounts of ground water as well as a concerted strategy to save the ground water availability and environmental sustainability. Electrocoagulation is one technology that has high efficiency in the removal of contaminants, good quality effluent , short operation time , low sludge production, stable and easy to remove . This research uses synthetic and Grand Hotel Royal Panghegar’s grey water and conducted with batch and continuous systems using aluminum monopolar electrode pair configuration. Batch experiments uses synthetic grey water. Variations used in the batch system are detention time (5-60 minutes) and current density (21-104 A/m2). The continuous system uses the current density 104 A/m2 and load concentration variations (200 ; 300 ; 400 mg COD/L). The results obtained in the batch system has optimum condition on the current density 104 A/m2 in the 15th minute with an aluminum ion release rate is 0.0071 g/min. Kinetics rate of the electrocoagulation reactor follow the first order reaction gives the best results in the removal efficiency of turbidity, COD and oil grease are 87.73% , 87.48% and 77.50%. In the application of continuous electrocoagulation system with optimum condition gives the best results with turbidity removal efficiency is 88.80 % , COD is 82.14 % and oil grease is 83.30%, while the variation of the load concentration of 400 mg COD/L gives the best results with turbidity removal efficiency is 89.97% , COD is 61.52% and oil grease is 90.05%. The results of the electrocoagulation process is under the quality standard of Keputusan Menteri Kesehatan Republik Indonesia Number 492/Menkes/Per/IV/2010 and Keputusan Menteri Negara Lingkungan Hidup Number 112 Year 2011, so it is safe to use reclaimed water for flushing toilets and watering plants.