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~ Dasar-Dasar Teknologi Biogas

Alpen Steel | Renewable Energy


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~ Dasar-Dasar Teknologi Biogas

Dasar-Dasar Teknologi Biogas

Biogas adalah gas mudah terbakar   (flammable) yang dihasilkan dari proses fermentasi bahan-bahan
organik oleh bakteri-bakteri anaerob (bakteri yang hidup dalam kondisi kedap udara). Pada umumnya
semua jenis bahan organik bisa diproses untuk menghasilkan biogas, namun demikian hanya bahan
organik (padat, cair) homogen seperti kotoran dan urine (air kencing) hewan ternak yang cocok untuk
sistem biogas sederhana. Disamping  itu juga sangat  mungkin menyatukan saluran  pembuangan di
kamar mandi atau WC ke dalam sistem Biogas. Di daerah yang banyak industri   pemrosesan maka-
nan antara lain tahu, tempe, ikan  pindang atau brem  bisa menyatukan   saluran limbahnya ke dalam
sistem Biogas, sehingga  limbah industri  tersebut tidak mencemari   lingkungan di sekitarnya. Hal ini
memungkinkan karena limbah industri tersebut diatas berasal dari bahan organik yang homogen.

Jenis bahan organik yang diproses sangat mempengaruhi produktifitas sistem biogas   disamping pa-
rameter-parameter lain seperti temperatur digester, pH, tekanan dan kelembaban udara.

Salah satu cara menentuka bahan organik yang  sesuai untuk menjadi bahan   masukan sistem Bio-
gas  adalah  dengan  mengetahui  perbandingan Karbon (C) dan Nitrogen (N) atau disebut rasio C/N.
Beberapa percobaan yang telah dilakukan oleh ISAT menunjukkan bahwa aktifitas metabolisme dari
bakteri methanogenik akan optimal pada nilai rasio C/N sekitar 8-20.

Sumber:
Majalah Kampus Genta

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