Artikel penelitian
Vol 11 No 1 (2017): Volume 11, Number 1, 2017
Pengaruh organic loading rate pada produksi biohidrogen dari sampah buah melon (Cucumis melo L.) menggunakan reaktor alir pipa
Departemen Teknik Kimia, Fakultas Teknik Universitas Gadjah Mada Jl. Grafika No. 2, Yogyakarta, 55281
Departemen Teknik Kimia, Fakultas Teknik Universitas Gadjah Mada Jl. Grafika No. 2, Yogyakarta, 55281
Departemen Teknik Kimia, Fakultas Teknik Universitas Gadjah Mada Jl. Grafika No. 2, Yogyakarta, 55281
Abstrak
Krisis energi dan dampak buruk dari penggunaan bahan bakar fosil menuntut pengembangan sumber energi yang bersifat non-polutif dan terbarukan, misalnya bio-H2. Bio-H2 dapat di produksi dari biomassa organik seperti sampah buah melon, karena terdapat dalam jumlah banyak dan memiliki kandungan fraksi organik yang memadai. Pada penelitian ini produksi bio-H2 dari sampah buah melon dilakukan secara fermentasi gelap pada reaktor alir pipa yang terdiri dari tahap aklimatisasi mikroorganisme dan tahap pengumpanan substrat secara kontinu. Variasi organic loading rate (OLR) yang digunakan adalah 6.04 kg VS/(m3.hari) (OLR-1), 7.62 kg VS/(m3.hari) (OLR-2) dan 26.32 kg VS/(m3.hari) (OLR-3). Sampel gas dan cairan diambil dari dalam reaktor untuk di analisis kadar H2, kadar volatile solid (VS) dan volatile fatty acid (VFA). Hasil penelitian menunjukkan bahwa produksi bio-H2 yang optimal sebesar 90.89 mL/g VS pada variasi OLR-3 yaitu 26.32 kg VS/(m3.hari) dengan efisiensi degradasi substrat mencapai 45.39%. Konsentrasi asam-asam organik yang dihasilkan berkisar antara 400-800 mg/L dan asam asetat adalah sebagai produk yang dominan dengan konsentrasi rata-rata sebesar 442.93 mg/L.
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