Foam formation in full-scale biogas plants processing biogenic waste

Table 6 Water soluble elements in grease separator contents used as substrate in BP B

	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	Grease separator content from a canteen kitchen
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

ISSN: 2192-0567