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PART 1 - 1. INTRODUCTION
When someone speaks of biogas, which is usually referred to is the gas produced by anaerobic biological process (without contact with free oxygen), which consists of a combination of methane (CH4), carbon dioxide (CO2), Water in the form of vapor (H20), and some Other gases like hydrogen sulfide (H2S), nitrogen (N2), hydrogen (H2) and other types of gas in small quantities. In shorter, biogas can be interpreted as a "gas produced by living things."
In this article tells a bit about the concept of biogas and Biodigester and will be told and documented regarding the manufacture and installation of plant (digester) biogas. WHAT IS AND WHAT IS BIOGAS BIODIGESTER? BIOGAS
Biogas is gas produced from anaerobic decomposition (without oxygen) or fermentation of organic material. | Types of Organic Materials | Gas production per kg of manure (m3) | | Cow / buffalo Manure | 0,023 - 0,040 | | Pig Manure | 0,040 - 0,059 | | Chicken manure | 0,065 - 0,116 | | Human waste | 0,020 - 0,028 | Gas produced from the anaerobic process Gas Name | Content | | Methan (CH4) | 55 -75 % | | Karbondioksida (CO2) | 25 – 45 % | | Karbon monoksida (CO) | 0,03% | | Nitrogen N2 | 1 – 5 % | | Hidrogen H2 | 0 – 3% | | Sulfur (H2S) | 0 ,1 – 0,5 | | Oksigen (02 | sisanya |
which affect biogas production• Room conditions (without oxygen) • Temperature (Temp) 30-35 degrees • Derajar acidity (Ph) 7 to 8.5 • Organic Materials BIODIGESTER Biodigester Models • Floating drum Reactor
 • Fixed dome Reactor
• Lagoon Reactor
• Plactic Reaktor  The basic concept of the biogas production process flow. Figure 1: Process flow diagram of biogas production Yayasan Pengembangan Biosains dan Bioteknologi (YPBB)
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