Table 1 Overview of sampled digester types and input feeding based on descriptive data
From: Eubacteria and archaea communities in seven mesophile anaerobic digester plants in Germany
Sample | Digester type | Input materials | Plant configuration |
|---|---|---|---|
LB-Schmölln | Leach-bed batch digester | Silage, straw, cow manure | Batch process (11 batches) |
Digester volume: 11 × 800 m3 | |||
Leachate tank: 1000 m3 | |||
Batch process duration: 26–29 days | |||
Gas production: 0.7 m3/m3 × day | |||
OLR: 1.3 kg × VS/m3 × day | |||
CD-Jena | Two-stage digester (vertical plug flow reactor/stirred tank) | Silage, farm manure, Livestock farming waste | Two-stage process |
Stage 1 (plug flow): 790 m3 | |||
Stage 2 (CSTR): 2000 m3 | |||
Stage 3 (final storage tank): 3800 m3 | |||
HRT: 87 days | |||
Gas production: 1.2 m3/m3 × day | |||
OLR: 3.0 kg × VS/m3 × day | |||
SS-Jena | Completely mixed tank digester | Mono-digestion of municipal sewage sludge | Single stage process (2 digesters) |
Digester volume: 2 × 2000 m3 | |||
HRT: 21 days | |||
Gas production: 0.6 m3/m3 × day | |||
OLR: 1.8 kg × VS/m3 × day | |||
SS-Weimar | Completely mixed tank digester | Mono-digestion of municipal sewage sludge | Single stage process |
Digester volume: 3200 m3 | |||
HRT: 29 days | |||
Gas production: 0.6 m3/m3 × day | |||
OLR: 0.96 kg × VS/m3 × day | |||
LB-Schlossvippach | Leach-bed batch digester | Cow manure, straw, feed residues | Batch process (8 batches) |
Leachate tank: 1000 m3 | |||
Digester volume: 8 × 330 m3 | |||
Batch process duration: 32–35 days | |||
Gas production: 0.5 m3/m3 × day | |||
OLR: 2.1 kg × VS/m3 × day | |||
SS-Rudolstadt | Completely mixed tank digester | Co-digestion of municipal and industrial sewage sludge with seasonally available co-substrates (biodiesel waste) | Single-stage process (2 digesters) |
Digester volume: 2 × 2000 m3 | |||
HRT: 25 days | |||
Gas production: 0.3 m3/m3 × day | |||
OLR: 0.54 kg × VS/m3 × days | |||
LB-Saalfeld | Leach-bed batch digester | Organic fraction of municipal solid waste | Batch process (9 batches) |
Digester volume: 9 × 826 m3 | |||
Leachate tank: 1060 m3 | |||
Batch process duration: 33 days | |||
Gas production: 0.7 m3/m3 × day | |||
OLR: 0.9 kg × VS/m3 × day |