TABLE 3.
A summary of studies of inhibition of anaerobic co-digestion of swine carcass and other residues.
| Substrate | Reactor design | Ratio | Organic loading rate | Temp. (°C) | pH | Free ammonia | Volatile fatty acids (g L–1) | References |
| Swine manure and swine carcass | Sequential batch | 20 and 40 gcarcass.Lmanure–1 | 3.2 g COD L–1 d–1 | 25 | 8.2 | – | No accumulation | Massé et al., 2008 |
| Swine manure and swine carcass | Sequential batch | 117 gcarcass.Lmanure–1 | 3.2 g COD L–1 d–1 | 25 | 7.95 | 302 ± 24 | max 6 | Rajagopal et al., 2014 |
| 233 gcarcass.Lmanure–1 | 3.2 g COD L–1 d–1 | 25 | 7.97 | 323 ± 12 | max 5 | |||
| 467 gcarcass.Lmanure–1 | 3.2 g COD L–1 d–1 | 25 | 7.82 | 313 ± 29 | max 4 | |||
| Swine carcass | Batch | – | 50 gTS L–1 | 35 | 8.02 | – | Increase during feed phase (to 5.9), decrease after 30 days of non-feeding phase (0.4) | Kirby et al., 2018 |
| – | 100 gTS L–1 | 7.99 | – | |||||
| Swine carcass and sugar beet pulp | Batch | 1:1 (TS base) | 50 gTS L–1 | 35 | 7.87 | – | Increase during feed phase (to 5.1), decrease after 30 days of non-feeding phase (0.1) | |
| 100 gTS L–1 | 7.95 | – | ||||||
| Swine carcass and vinasse | – | 1:1 (VS base) | 6.8 kgVS.m–3 | 35 | 7.75 | 600 mg L–1 (no effect on performance) | Accumulation of acids (reduction of 75% in biogas yield) | Dai et al., 2015 |