Applied Biological Chemistry

Table 2 Physicochemical properties of dried BSG, and BBxxx produced at the different pyrolysis temperatures

From: Effects of brewer’s spent grain biochar on the growth and quality of leaf lettuce (Lactuca sativa L. var. crispa.)

Sample	Yield (%)	pH (1:10 H₂O)	EC (dS m⁻¹)	T-P (%)	Elemental content (%)		C/N ratio	Inorganic contents (%)
Sample	Yield (%)	pH (1:10 H₂O)	EC (dS m⁻¹)	T-P (%)	C	N	C/N ratio	K₂O	CaO	MgO
BSG	–	5.20 ± 0.01	2.69 ± 0.01	1.01 ± 0.01	51.04 ± 1.37	3.96 ± 0.20	12.91 ± 0.33	0.08 ± 0.01	0.40 ± 0.01	0.41 ± 0.01
BB₃₀₀	52.40 ± 1.42	6.02 ± 0.03	0.73 ± 0.00	1.57 ± 0.10	66.43 ± 1.88	4.47 ± 0.25	14.89 ± 0.83	0.15 ± 0.04	0.73 ± 0.02	0.71 ± 0.03
BB₅₀₀	27.30 ± 0.73	7.10 ± 0.00	0.41 ± 0.00	3.75 ± 0.14	73.40 ± 1.64	4.87 ± 0.14	15.06 ± 0.46	0.24 ± 0.01	1.26 ± 0.02	1.35 ± 0.02
BB₇₀₀	24.19 ± 1.41	7.82 ± 0.03	0.21 ± 0.00	3.39 ± 0.08	76.07 ± 1.74	3.79 ± 0.05	20.09 ± 0.40	0.22 ± 0.00	1.18 ± 0.04	1.35 ± 0.02

BSG brewer’s spent grain, BBxxx brewer’s spent grain biochar (pyrolyzed at xxx℃), EC electrical conductivity, T-P total phosphorus, C carbon, N nitrogen, OM organic matter

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