Table A2.

Labourer cost for O&M of biogas plant (USD)

Items	Small	Medium	Large
Labor hour per day	0.45	0.50	1.00
Wage rate per day	4.17	4.17	4.17
Wage rate per hour	0.52	0.52	0.52
Per day expense	0.23	0.26	0.52
Yearly expense	84.38	93.75	187.50