Regional water footprints of potential biofuel production in China

Table 1 Summary of water footprints of biofuels in different regions

Biofuels	Feedstock	Region	Water footprint (L H₂O/L biofuel)				Source
Biofuels	Feedstock	Region	Total	Blue	Green	Grey	Source
Bioethanol	Cassava	Global	2926	420	2506	–	[43]
		China	2827	22	520	2384	[40]
		Thailand	2414	703	1641	70	[39]
		Thailand	2161	6	2147	8	[41]
		Thailand	2021	335	1686	–	[48]
		Thailand	2582	449	2389	–	[49]
		Nigeria	783	407	376	–	[50]
	Sorghum	Global	9812	4254	5558	–	[43]
		Taiwan	4394	1740	2291	364	[42]
		China	13,541	35	1195	12,310	[40]
Biodiesel	Jatropha curcas	Mozambique^a	15,264	3	15,261	–	[46]
		South Africa^a	8281	–	–	–	[45]
		China	4565	23	845	3697	[40]
		Global^b	19,924	11,636	8288	–	[43]

Conversion factors: Heating value—biodiesel: 37.7 MJ/kg [45], bioethanol: 29.7 MJ/kg; density—biodiesel: 0.88 kg/L; bioethanol: 0.7893 kg/L
^aOnly Jatropha oil is considered, not biodiesel
^bAverage values for five countries (India, Indonesia, Nicaragua, Brazil, and Guatemala)

ISSN: 2731-3654