Produksi Biolistrik Limbah Cair Pemindangan dengan Sistem Salt Bridge Microbial Fuel Cell Berbahan Natrium Alginat

Abstract

Microbial fuel cell (MFC) merupakan suatu teknologi alternatif penghasil energi listrik dari limbah cair. Microbial fuel cell dua bejana terdiri dari bejana anoda dan katoda yang dihubungkan oleh membran penukar proton maupun jembatan garam. Na-alginat merupakan polimer alami yang dapat dijadikan media jembatan garam. Penelitian ini bertujuan menentukan produksi biolistrik dan penurunan beban polusi dari limbah cair pemindangan dengan sistem salt-bridge microbial fuel cell berbahan Na-alginat. Konsentrasi Na-alginat yang digunakan yaitu 10%, 15%, dan 20%. Nilai elektrisitas tertinggi diperoleh pada perlakuan konsentrasi Na-alginat 20% yaitu nilai tegangan listrik sebesar 1,53 V, arus listrik sebesar 3,96 mA, dan daya listrik sebesar 6,03 mW. MFC jembatan garam Na alginat mampu menurunkan parameter biological oxygen demand (BOD) dan total ammonia nitrogen (TAN) sebesar 73% dan 76%. Perbedaan konsentrasi Na-alginat mempengaruhi kinerja MFC. Perlakuan terbaik terdapat pada konsentrasi Na-alginat 20%.

Microbial fuel cell is an alternative technology for producing electrical energy from wastewater. Dual chamber MFCs consists of anode and cathode chambers connected with a proton exchange membrane or salt bridge. Sodium alginate is a natural polymer that can be used as salt bridge medium. This study was aimed to determine the bioelectric production and reduce the pollution load from the effluent using salt-bridge microbial fuel cell system made from Na-alginate. The sodium alginate concentrations used were 10%, 15%, and 20%. The highest value of electricity was obtained in the treatment of 20% sodium alginate concentration, the electric voltage was 1,53 V, the electric current was 3,96 mA, and the electric power was 6,03 mW. Sodium alginate salt bridge MFCs were able to reduce BOD and TAN parameters by 73% and 76%, respectively. Differences in Na-alginate concentrations affect MFC performance. The best treatment was at a concentration of 20% Na-alginate.