Fuzzy Logic System for Intermixed Biogas and Photovoltaics Measurement and Control

Table 7

Three-month period digester status readings.

Output	Date/period (mm/dd/yy)
	9/30/16	10/12/16	10/21/16	10/31/16	11/7/16	11/15/16	11/18/16
% stability	67.9	67.1	67.4	66.7	70.1	50	58
CH4  ×  10^3 L	7.2	7.5	7.7	7.83	7.65	7.6	7.45
CH4  ×  ppm	3678	4501	4877	4999	3589	4770	4003
CO2  ×  10^3 L	3.7	3.75	3.89	3.9	3.86	3.83	3.82
CO2 ppm	1200	1444	1905	2178	2033	1588	1334
% danger	25	25	27	25	33	26	25