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. 2021 Mar 16;55(8):5291–5300. doi: 10.1021/acs.est.0c03724

Table 3. Biomass Composition Determined through Ultimate and Proximate Analysis.

	Ultimate Analysis/wt%^a					Proximate Analysis/wt%
Sludge fraction	C	H^c	N	O^d	S	Fixed Carbon^a	Volatiles^a	Ash^b	HHV/MJ kg^–1
Severn Trent cake	29.8	4.9	4.6	59.3	1.3	17.9	83.2	38.5	13.6
Treated fraction	28.7	4.1	4.2	62.0	1.0	23.2	76.7	38.7	13.7
Residue	56.4	8.1	3.5	25.3	6.8	14.7	84.8	0.60	20.5

^a

Dry, ash-free basis.

^b

Dry basis.

^c

Not including H in the moisture.

^d

Calculated by difference.