Bioenergy Production Potential of Available Biomass Residue Resources in Ethiopia

Table 3

Estimated crop residues and bioenergy potential.

Crop group	Crop type	Type of residue	Production amount (kt)^a	RPR (dimensionless)^b	RF (dimensionless)^b	LHV (MJ·kg^−1)^b	Total amount of residue (kt)	Recoverable amount of residue (kt)	Potential bioenergy (PJ·y^−1)
Cereals	Maize	Stalk	10,557	1.7	0.8	14.7	18,128	14,502	212.56
		Husk	10,557	0.2	1.0	14.1	2,191	2,191	30.84
		Cob	10,557	0.4	1.0	15.4	4,187	4,187	64.60
	Wheat	Straw	5,780	1.3	0.3	16.1	7,514	2,179	35.09
		Husks	5,780	0.3	0.3	15.1	1,532	444	6.73
	Teff	Residue	5,510	2.3	0.3	15.0	12,673	3,802	57.03
	Sorghum	Straw	4,517	1.7	0.8	12.4	7,890	6,312	78.15
		Stalk	4,517	2.8	0.8	16.0	12,863	10,291	164.65
	Barley	Straws	2,339	1.3	0.3	15.9	2,936	822	13.05
	Finger millet	Straw	1,203	1.5	0.6	14.5	1,845	1,015	14.67
	Rice	Straw	268	1.5	0.5	15.8	392	190	3.00
		Husk	268	0.3	0.8	17.4	71	58	1.00
	Oats/aja	Straw	31	1.4	0.3	13.7	43	12	0.16
Pulses	Faba beans	Stems-leaves	1,071	1.5	0.2	15.2	1,552	233	3.54
	Lentils	Straw	113	1.7	0.2	14.7	196	39	0.57
	Soybeans	Straw	209	2.3	0.7	15.2	485	339	5.14
		Pods	209	1.0	1.0	12.4	209	209	2.58
Oil seeds	Sesame	Stalk	260	1.5	0.1	14.4	390	49	0.70
	Groundnut	Shells	205	0.4	0.9	17.6	82	77	1.35
		Straw	205	2.2	0.9	15.6	451	421	6.56
	Linseed	Stalk	80	1.5	0.5	14.4	118	59	0.85
	Rapeseed	Straw	13	1.6	0.2	14.6	20	4	0.07
	Safflower	Stalk	4	3.0	0.8	13.9	13	11	0.15
Vegetables	Red peppers	Residues	296	0.5	0.5	12.0	133	67	0.80
	Green peppers	Residues	74	0.5	0.5	12.0	33	17	0.20
	Tomatoes	Stem	42	0.3	0.5	13.7	13	6	0.09
		Leaves	42	0.3	0.5	13.7	13	6	0.09
	Lettuce	Waste	1	1.2	0.5	12.8	1	0	0.00
Root crops	Taro/godere	Peelings	2,328	0.3	1.0	10.6	652	652	6.92
		Straw	2,328	0.5	0.8	10.6	1,164	931	9.88
	Sweet potatoes	Leaves and peels	1,599	0.5	0.8	13.3	799	640	8.51
	Potatoes	Peelings	1,142	0.8	1.0	10.6	856	856	9.09
		Leaves	1,142	0.8	0.8	16.0	868	694	11.11
	Yam/boye	Peelings	46	0.2	1.0	10.6	10	10	0.11
		Straw	46	0.5	0.8	10.6	23	18	0.19
Fruit crops	Bananas	Leaves	898	0.4	0.8	11.4	314	252	2.86
		Stem	898	5.6	0.8	12.4	5,031	4,025	49.82
		Peels	898	0.3	0.8	15.8	225	180	2.84
	Mangoes	Prunings	151	1.8	0.8	17.5	272	218	3.81
	Oranges	Prunings	40	0.3	0.8	18.1	11	9	0.16
	Lemons	Prunings	6	0.3	0.8	17.6	2	1	0.03
Other	Coffee, green	Husk	585	2.1	1.0	14.2	1,228	1,228	17.48
	Sugarcane	Baggase	1,345	0.2	0.7	19.0	312	230	4.35
		Topes/leaves	1,345	0.2	0.9	17.9	300	259	4.64
									836.03

^aObtained from the Ethiopian Central Statistical Agency (CSA) [46].