Nitrogen-content and C/N-ratio of Organic Substrates

Source	Biodegradable material	N [%]	C/N
Maramba, Felix: Biogas and Waste Recycling - The Phillipine Experience; Metro Manila, Phillipines, 1978, p. 43	A. Animal Dung
	1. Hog	2.8	13.7
	2. Carabao	1.6	23.1
	3. Cow	1.8	19.9
	4. Chicken	3.7	9.65
	5. Duck	0.8	27.4
	6. Pugo	5.0	6.74
	Household Wastes
	1. Nightsoil	7.1	6.72
	2. Kitchen waste	1.9	28.60
	C. Crop Residues (air-dry)
	1. Corn stalks	1.2	56.6
	2. Rice straw	0.7	51.0
	3. Corn cobs	1.0	49.9
	4. Peanut hulls	1.7	31.0
	5. Cogon	1 07	-
	6. Bagasse	0.40	-
	D. Others
	1. Kangkong	4.3	7.8
	2. Water lily	2.9	11.4
	3. Grass trimmings	2.5	15.7
Barnett, A. et al.: Biogas Technology in the Third World; Ottawa, Canada, 1978, p. 51	Night soil	6	6-10
	Cow manure	1.7	18
	Chicken manure	6.3	7.3
	Horse manure	2.3	25
	Hay, grass	4	12
	Hay, alfalfa	2.8	17
	Seaweed	1.9	79
	Oat straw	1.1	48
	Wheat straw	0.5	150
	Bagasse	0.3	150
	Sawdust	0.1	200-500
Kaltwasser, Bernd: Biogas; Wiesbaden, FRG, 1980, pp. 35-36	Night soil	6.0	5.9-10
	Cow manure	1.7	16.6-25
	Pig manure	3.8	6.2-12.5
	Chicken droppings	6.3	5-7.1
	Horse manure	2.3	25
	Sheep manure	3.8	33
	Hay	4.0	12.5-25
	Lucernes	2.8	16.6
	Algae	1.9	100
	Oat straw	1.1	50
	Wheat straw	0.5	100-125
	Cane trash (bagasse)	0.3	140
	Sawdust	0.1	200-500
	Cabbage	3.6	12.5
	Tomatoes	3.3	12.5
	Mustard (runch)	1.5	25
	Potato peels	1.5	25
	Rice straw	0.6	67
	Corn straw	0.8	50
	Fallen leaves	1.0	50
	Soybean stalks	1.3	33
	Peanut shoots	0.6	20

Table B2: Nitrogen-content and C/N-ratio data for a selection of organic substrates, compiled from various sources

Source: Production and Utilization of Biogas in Rural Areas of Industrialized and Developing Countries, Schriftenreihe der gtz, No. 97, pp. 71-72