Efficacies of Various Anaerobic Starter Seeds for Biogas Production from Different Types of Wastewater

Table 1

The characteristics of various wastewaters used in this study.

Parameter	Unit	RBw	CSw	POw	SWw	SMw
pH	—	4.58	4.58	4.26	7.24	4.06
Alkalinity	mg/L	1,100	400	1,100	13,000	400
Total volatile acid (TVA)	mg/L	3,460	1,100	6,117	11,000	100
Total COD (TCOD)	mg/L	17,200	25,200	86,200	181,100	7,300
Soluble COD (SCOD)	mg/L	16,900	14,200	45,000	19,100	3,000
Total Kjeldahl nitrogen (TKN)	mg/L	1,800	400	1,100	6,500	300
Total solids (TS)	g/L	16.40	19.37	60.05	188.20	4.67
Volatile solids (VS)	g/L	13.82	16.91	50.24	146.9	4.09
Protein (P)	g/L	10.98	2.30	6.78	40.47	1.55
Carbohydrate (C)	g/L	2.84	13.97	29.89	81.30	1.73
Oil & grease (O)	g/L	0	0.63	13.56	16.10	0.82
P : C : O ratio	—	4 : 1 : 0	4 : 22 : 1	1 : 4 : 2	3 : 5 : 1	2 : 2 : 1