Table 1 Feeding characterizations and operational conditions of the reactors
| Â | Agropur | Lassonde | Tembec |
|---|---|---|---|
Effluent treated | Cheese factory | Fruit juice factory | Pulp and paper mill |
Digester volume capacity (m3) | 550 | 400 | 2000 |
Retention time (average) (h) | 12 | 24 | 6 |
pH in digester | 6.8–6.9 | 6.8–7.2 | 7.1–7.2 |
Total COD (wastewater in) (mg/L) | 2400 | 4500–7000 | 6000–8000 |
Soluble COD (wastewater in) (mg/L) | 1400 | 4500–6000 | 6000–8000 |
Total COD (effluent) (mg/L) | 800 | 300–500 | 1000–2000 |
Soluble COD (effluent) (mg/L) | ≤ 50 | 200 | 1000–2000 |
Ammonia (effluent) (mg/L) | 90 | ≤ 1 | 20–30 |
Granules (square = 1 mm2) |
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