Research Article
Monitoring N : P Ratio and Cd, Cu, Pb, and Zn Contents in Different Types of Anaerobic Digestates: A Six-Year Study Case
Table 1
Input material and operating parameters of the four biogas plants included in the study and given designations of the resulting digestates (“DG”).
| Plant | A | B | C | D |
| Input | 53% cattle slurry | 38% pig slurry | 50% maize silage | 25% Cattle slurry | 37% maize silage | 38% maize silage | 50% grass silage | 25% Grass silage | 5% grass silage | 14% millet silage | | 19% Maize silage | 5% other remains | 10% grass silage | | 16% Cattle manure | | | | 15% Rye and rye silage |
| Operating temperature | Mesophile | Mesophile | Thermophile | Mesophile | Retention time | 70 days | 60 days | 50 days | 80 days | Related products | “DG cattle” and “Cattle slurry” | “DG pig” | “DG renew” | “DG Mix liquid” and “DG Mix solid” |
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