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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
  1. Gas production is given in cubic meter of produced gas per cubic meter of sludge per day
  2. HRT hydraulic retention time, CSTR continuous stirred-tank reactor, OLR organic loading rate