Table 9.

The level of questions and how respondents (owners of biogas plants) contradicted the semi-structured interview. Part A: Demographic features of respondents (biogas plant owners)

Part A: Demographic characteristic of respondents (biogas plant owners)
Variables	Features	Frequency	%
Gender	Male	68	79.06
	Female	11	12.79
Age	Less than 26	7	8.86
	25–31	17	21.51
	31–45	21	26.58
	45–53	11	13.92
	57–65	15	18.98
	65 and above	8	10.12
Education of biogas plant users	Under metric	18	22.78
	Metric	19	24.05
	Faculty of Arts	17	21.51
	Bachelor	14	17.72
	Master	11	13.92
Experience of biogas plant users	1–4 years	18	22.78
	4–6 years	11	13.92
	6–8 years	16	20.25
	8–10 years	15	18.98
	10–12 years	12	15.18
	12- and above	7	8.86
Brand names of biogas plants	Fixed drum
	Chinese fixed − dome plant	18	22.78
	Janata model	17	21.51
	Deenbandhu	14	17.72
	Camartec model	11	13.92
	Floating drum
	A mild-steel gas storage drum	13	16.45
	Inverted over the slurry	6	7.59