Generation of green electricity from sludge using photo-stimulated bacterial consortium as a sustainable technology

Table 2 Output potential difference values in the collected sludge samples

Time (Days)		Output Potential difference values (mV)				F-test	p-value
Time (Days)		S1	S2	S3	S4	F-test	p-value
Day 0	Stage One	281.93 ± 0.83D	365.23 ± 0.25B	430.80 ± 0.98A	297.00 ± 0.50C	49.539	< 0.001**
Day 1	Stage One	177.87 ± 0.78D	262.50 ± 0.50B	310.90 ± 0.66A	189.50 ± 0.50C	53.756	< 0.001**
Day 2	Stage Two	150.80 ± 0.62C	200.60 ± 0.66B	270.53 ± 0.45A	156.70 ± 0.44C	68.468	< 0.001**
Day 3		146.83 ± 0.47C	198.50 ± 0.50B	250.67 ± 0.40A	151.90 ± 0.26A	23.658	< 0.001**
Day 4		133.80 ± 0.62D	182.00 ± 0.90B	211.00 ± 0.20A	147.87 ± 0.51C	33.974	< 0.001**
Day 5	Stage Three	84.43 ± 0.31D	105.93 ± 0.60B	136.23 ± 0.25A	92.63 ± 0.45C	20.381	< 0.001**
Day 6		63.30 ± 0.26D	75.37 ± 0.47B	98.37 ± 0.25A	71.53 ± 0.40C	49.050	< 0.001**
Day 7		31.33 ± 0.15D	43.70 ± 0.44B	50.70 ± 0.46A	38.67 ± 0.35C	79.031	< 0.001**
Day 8	Stage Four	28.17 ± 0.15D	41.83 ± 0.76B	48.67 ± 0.50A	34.77 ± 0.32C	20.399	< 0.001**
Day 9		26.23 ± 0.25D	37.47 ± 0.45B	46.40 ± 0.26A	31.63 ± 0.35C	35.520	< 0.001**
Day 10		24.30 ± 0.20D	35.53 ± 0.55A	30.23 ± 26.19A	29.27 ± 0.25C	33.627	< 0.001**

Data are expressed by Mean ± SD & Multiple comparison between groups through Post Hoc test: Tukey’s test.
Letters A-D comparatively represent the descending order of results reflecting importance among means in the same row p-value > 0.05 is insignificant; *p-value < 0.05 is significant; **p-value < 0.001 is highly significant

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