NUTRIENT RECOVERY FROM LANDFILL LEACHATE THROUGH STRUVITE CRYSTALLIZATION METHOD USING AIR-CATHODE ELECTROCOAGULATION (ACEC) TECHNOLOGY

• Main Author: Ananta Dwi Putra, Narendra
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/81077
• Institution: Institut Teknologi Bandung

The presence of excess phosphorus and nitrogen in water bodies can cause environmental problems. The wastewater treatment method that is being developed to overcome this problem by recovery ammonium and phosphorus into struvite or struvite crystallization using AirCathode Electrocoagulation technology. This method uses electrochemical principles, oxidation of the Mg anode plate from Mg0 to Mg2+ and O2 reduction from ambient air to OH-. One of the factors that affect struvite crystallization process is flow rate which influences nutrient removal and struvite formation. This research used four variations of flowrate value, 1 mL/minute, 2 mL/minute, 3 mL/minute, and 4 mL/minute. The research was conducted by measuring the efficiency of nutrient removal and analyzing the characteristics of precipitates using SEM-EDS method. Polarization tests and electricity production analysis were also conducted to determine the characteristics of the ACEC reactor. The results showed that there was an optimum flowrate value, 2 mL/minute, with highest nutrient removal efficiency and struvite formation. Using flowrate values <2 mL/minute or >2 mL/minute reduces nutrient removal efficiency and inhibiting precipitate formation. Based on the polarization curve, a maximum power density of 293.8 mW/cm2 is obtained and there is an overpotential loss of 1650 mV. Electricity production at all four flowrate variations decreases during reactor operation