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Microbiological Process Optimization of Biogas Synthesis

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3<br />

2<br />

2<br />

1<br />

1<br />

2<br />

4<br />

Microbiology <strong>of</strong> the<br />

biogas process:<br />

A Black Box?<br />

Functional groups:<br />

1: Primary fermenters<br />

2: Secondary fermenters<br />

(syntrophic consortia),<br />

homoacetogens<br />

3: Aceticlastic methanogens<br />

4: Hydrogenotrophic<br />

methanogens<br />

Competing: sulfate reducers

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