Biogas Production through Anaerobic Codigestion of Distillery Wastewater Sludge and Disposable Spent Yeast

Table 4

Mixture characterization before digestion.

S. no	Parameters	Unit	Substrate mixing ratio DWWS : DWY (%)
			99 : 1	92 : 8	85 : 15
1	COD	mg/L	1334.50 ± 152.94	3158.67 ± 462.64	4460.50 ± 39.20
2	BOD5	mg/L	752.25 ± 19.92	1741.11 ± 32.03	2699.50 ± 15.86
3	BI	—	0.6 ± 0.05	0.6 ± 0.07	0.61 ± 0.00
4	Temperature	(°C)	32.04 ± 0.52	35.99 ± 0.34	39.71 ± 0.54
5	pH	—	7.55 ± 0.21	6.69 ± 0.16	6.00 ± 0.18
6	TS	mg/L	793.92 ± 49.49	1789.57 ± 32.12	4117.00 ± 96.49

Note. DWWS: distillery wastewater sludge and DWY: distillery waste yeast.