Pengolahan Lumpur Tinja Pada Sludge Drying Bed IPLT Keputih Menjadi bahan Bakar Alternatif Dengan Metode Biodrying

Abstract

Lumpur tinja memiliki kandungan kadar organik yang tinggi, sehingga lumpr tinja berpotensi dijadikan sebagai bahan bakar alternatif. Dalam penelitian ini, lumpur tinja diolah dengan proses biodrying. Pada pengolahan lumpur tinja akan dianalisis pengaruh variasi air flow rate dan waktu tinggal terhadap perubahan suhu, penurunan kadar air, serta potensi lumpur tinja sebagai bahan bakar alternatif. Variasi pemberian air flow rate sebesar 25 liter/menit dan 15 liter/menit. Pada tiap variasi pemberian air flow rate akan dikenakan variasi waktu detensi selama 7, 14 dan 21 hari. Hasil penelitian menunjukan air flow rate 25 liter/menit, kadar air dan nilai karbon akhirnya mencapai 80,9% dan 40,40% selama 7 hari; 13,65% dan 39,76% selama 14 hari; 10,53% dan 38,90% selama 21 hari. Pada reaktor dengan pemberian air flow rate 15 liter/menit kadar air dan nilai karbon akhirnya  mencapai 86,19% dan 39,41% selama 7 hari; 81,29% dan 38,41% selama 14 hari; 67,90% dan 35,77% selama 21 hari. Berdasarkan nilai kalor aktual, waktu detensi optimum diperoleh selama 18 hari dengan air flow rate 25 liter/menit tiap 0,23 kg berat kering atau setara dengan 6,52 m³ jam^-1 kg^-1. Pada kondisi tersebut nilai kalor aktual sebesar 3767,28 cal/gram.

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