A start-up of psychrophilic anaerobic sequence batch reactor digesting a 35 % total solids feed of dairy manure and wheat straw

Saady, Noori M. Cata; Massé, Daniel I.

doi:10.1186/s13568-015-0144-1

AMB Express

Table 2 Physicochemical characteristics of the inoculum, cow feces and inoculum-substrate mixture at beginning of digestion cycle

From: A start-up of psychrophilic anaerobic sequence batch reactor digesting a 35 % total solids feed of dairy manure and wheat straw

Cycle	Type	Acetate (g kg⁻¹)	Propionate (g kg⁻¹)	Butyrate (g kg⁻¹)	pH	Alkalinity (g kg⁻¹ as CaCO₃)	TCOD (g kg⁻¹)	TS (%)	VS (%)
1	Inoculum	0.77 ± 0.47	0.24 ± 0.21	0.28 ± 0.08	7.3 ± 0.0	11.5 ± 0.55		11.0 ± 0.6	9.3 ± 0.5
	Feces	4.5	1.1	0.93	5.89		148.1	13.29	11.9
	ISM	1.1 ± 0.02	0.25 ± 0.02	0.29 ± 0.02	7.1 ± 0.0			14.1 ± 0.4	12.0 ± 0.6
2	Inoculum	0.84 ± 0.50	0.32 ± 0.22	0.26 ± 0.07	7.4 ± 0.1	11.8 ± 0.65		12.3 ± 0.4	10.6 ± 0.4
	Feces	3.4	0.88	1.39	6.18		148.1	13.29	11.9
	ISM	1.2 ± 0.05	0.28 ± 0.02	0.10 ± .01	7.0 ± 0.1			15.3 ± 0.1	13.4 ± 0.1
3	Inoculum	0.25 ± 0.03	0.0 ± 0.0	0.0 ± 0.0	7.3 ± 0.1	10.0 ± 1.8		13.8 ± 0.7	11.8 ± 0.6
	Feces	3.82	1.15	0.80	6.3		195.2	13.24	11.9
	ISM	1.79 ± 166.4	0.25 ± 135.5	0.08 ± 0.01	7.0 ± 0.2	9.6 ± 0.56		16.4 ± 0.3	14.3 ± 0.3
4	Inoculum	0.244 ± 0.01	0.01 ± 0.01	0.14 ± 0.02	7.6 ± 0.0			14.5 ± 0.3	12.4 ± 0.3
	Feces	3.99	1.05	0.65	6.64		173.5	13.22	11.8
	ISM	1.16 ± 0.08	0.24 ± 0.03	0.12 ± 0.11	7.2 ± 0.1			17.0 ± 0.6	14.8 ± 0.5
5	Inoculum	NA	NA	NA	7.3 ± 0.3		NA	15.2 ± 0.3	13.4 ± 0.5
	Feces	4.31	1.10	0.78	5.1		173.5	12.8	11.3
	ISM	0.86 ± 0.07	0.23 ± 0.03	0.19 ± 0.04	7.0 ± 0.1			18.7 ± 0.7	16.5 ± 0.7
6	Inoculum	0.13 ± 0.01	10.02 ± 0.0	0.0 ± 0.0	7.5 ± 0.5			16.8 ± 0.1	14.6 ± 0.1
	Feces	3.48	1.47	2.37	6.5		183.2	12.8	11.3
	ISM	0.56 ± 0.13	0.11 ± 0.05	0.11 ± 0.03	7.0 ± 0.2			19.3 ± 0.5	17.0 ± 0.5
7	Inoculum	0.18 ± 0.04	0.04 ± 0.0	0.06 ± 0.01	7.5 ± 0.1			17.6 ± 0.3	15.3 ± 0.2
	Feces	3.69	1.00	0.72			183.2	12.8	11.3
	ISM	0.35 ± 0.13	0.05 ± 0.01	0.06 ± 0.01	7.0 ± 0.2	9.4 ± 0.42		20.7 ± 0.4	18.2 ± 0.4
8	Inoculum	0.18 ± 0.03	0.03 ± 0.00	0.21 ± 0.03	7.6 ± 0.1			18.7 ± 0.3	16.2 ± 0.3
	Feces	1.54	0.46	0.26	6.95	5.5	184.2	12.53	11.2
	ISM	0.93 ± 0.06	0.28 ± 0.03	0.29 ± 0.03	7.1 ± 0.1			20.7 ± 1.3	18.0 ± 0.9
9	Inoculum	0.13 ± 0.02	0.03 ± 0.01	0.18 ± 0.02	7.6 ± 0.1			19.5 ± 0.1	17.0 ± 0.1
	Feces	1.54	0.46	0.26	6.95	5.5	184.2	12.53	11.2
	ISM	0.59 ± 0.08	0.11 ± 0.04	0.23 ± 0.04	7.1 ± 0.1			21.5 ± 0.4	19.0 ± 0.4
10	Inoculum	0.18 ± 0.04	0.05 ± 0.02	0.11 ± 0.03	7.7 ± 0.1			20.0 ± 0.2	17.4 ± 0.2
	Feces	5.0	1.34	2.22	6.17		220.5	16.18	14.3
	ISM	0.53 ± 0.11	0.05 ± 0.01	0.17 ± 0.03	7.2 ± 0.1			21.4 ± 0.4	18.7 ± 0.3
11	Inoculum	1.15 ± 0.03	0.03 ± 0.02	9.9 ± 17.1	7.7 ± 0.1	9.7 ± 0.32		20.4 ± 0.4	17.6 ± 0.4
	Feces	5.0	1.34	2.22	6.17		220.5	16.18	14.3
	ISM	0.23 ± 0.04	0.03 ± 0.02	0.0 ± 0.0	7.1 ± 0.3	9.6 ± 0.32		22.0 ± 0.7	19.3 ± 0.7
1-11	Wheat straw	−	−	−	−	−	1097	89.0 ± 0.0	85 ± 0.1

ISM inoculum-substrate mixture

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