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Pulp and paper industry produces large amount of wastewater that has high pollution potentials.  Nowadays, development of renewable energy resources is being researched. Membrane-less Microbial  Fuel Cell (ML-MFC) can be an alternative for wastewater treatment and bioenergy producers of  renewable electricity. This study was subjected to evaluate the performance of ML-MFC in pulp and  paper wastewater treatment and to analyze the potentials production of electricity energy. ML-MFC  reactors in laboratory scale used in this experiment were made of acrylic, provided with electrodes  functioning as anode and cathode which have surface area of 1.4778 x 10 -2 m 2 and 4.926 x 10 -3 m 2 ,  respectively. In this experiment, wastewater from pulp and paper mill was continuously fed into the  reactor with retention time of 48 hours and organic load about 0.23 – 0.51 kg COD/m 3 .day. The results  showed that there was potential of electricity production from pulp and paper mill’s wastewater treatment  by ML-MFC. The maximum COD reduction and maximum power supply voltage that could be achieved  were 38.50% and 118.8 mV, respectively. The maximum electric power obtained on the anode surface  area of 1.4778 x 10 -2 m 2 was 8.46 mW/m 2 when the electric current value was 101.50 mA/m 2 and the  resistance was 500 Ω. Keywords : wastewater, organic, bioconversion, electricity, membrane-less microbial fuel cell (ML-MFC) ABSTRAK Industri pulp dan kertas menghasilkan air limbah dalam jumlah besar yang memiliki potensi  pencemaran tinggi. Saat ini, upaya pengembangan sumber energi terbarukan terus dilakukan.  Membraneless Microbial Fuel Cell (ML-MFC) adalah salah satu alternatif pengolahan air limbah dan penghasil  bioenergi listrik yang dapat terbarukan. Penelitian ini dilakukan untuk mengevaluasi kinerja ML-MFC  dalam pengolahan air limbah pulp dan kertas proses biologi dan menganalisa potensi produksi energi  listrik. Reaktor ML-MFC skala laboratorium yang digunakan dalam percobaan terbuat dari akrilik  dengan rangkaian elektroda yang berfungsi sebagai anoda dengan luas permukaan 1,4778 x 10 -2 m 2 dan  katoda dengan luas permukaan 4,926 x 10 -3 m 2 . Pada percobaan ini, air limbah industri pulp dan kertas  dialirkan melalui reaktor secara kontinu dengan waktu tinggal 48 jam dan beban organik 0,23 – 0,51 kg  COD/m 3 .hari. Hasil penelitian menunjukkan bahwa terdapat potensi produksi energi listrik dari proses  pengolahan air limbah industri pulp dan kertas oleh ML-MFC. Reduksi maksimum nilai COD dan  tegangan listrik maksimum yang dapat dicapai adalah 38,50% dan 118,8 mV. Daya listrik maksimum  yang diperoleh pada luas permukaan anoda sebesar 1,4778 x 10 -2 m 2 adalah 8,46 mW/m 2 pada saat nilai  arus listrik 101,50 mA/m 2 dan beban resistansi 500 Ω . Kata kunci : air limbah, organik, biokonversi, energi listrik, membrane-less microbial fuel cell (ML-MFC)

BIOKONVERSI PADA PENGOLAHAN AIR LIMBAH INDUSTRI PULP DAN KERTAS MENGGUNAKAN MEMBRANE-LESS MICROBIAL FUEL CELL (ML-MFC)