Table 6 Water soluble elements in grease separator contents used as substrate in BP B
From: Foam formation in full-scale biogas plants processing biogenic waste
| Grease separator contents used at biogas plant BP B | Grease separator content from a canteen kitchen | ||||
|---|---|---|---|---|---|
| March 2012 (foaming event) | May 2012 (foaming event) | 4th June 2012 | 18th June 2012 | ||
| Aluminum [mg/L] | 1.42 | <1.2 | <1.2 | <1.2 | <1.2 |
| Calcium [mg/L] | 125 | 210 | 67.0 | 586 | 6.67 |
| Iron [mg/L] | 16.9 | <0.6 | 5.82 | 37.8 | 1.53 |
| Magnesium [mg/L] | 18.8 | 41.0 | 11.7 | 80.4 | 6.37 |
| Manganese [mg/L] | <0.2 | <0.2 | <0.2 | 2.32 | <0.2 |
| Phosphorus [mg/L] | 31.7 | 66.6 | 38.4 | 130 | 14.6 |
| Potassium [mg/L] | 52.8 | 77.8 | 1,500 | 143 | 28,2 |
| Sulfur [mg/L] | 26.1 | 46.6 | 33.8 | 53.2 | 39.4 |
| Zinc [mg/L] | 10.5 | <1.2 | <1.2 | <1.2 | <1.2 |