Research Article
Green Power Generation by Microbial Fuel Cells Using Pharmaceutical Wastewater as Substrate and Electroactive Biofilms (Bacteria/Biocarbon)
Table 3
Physicochemical parameters of PWW at different times during the long-term test. No determined.
| | Parameter | Units | Long-term test | | Initial (0 h) | Day 1 (24 h) | Day 7 (168 h) | Day 14 (336 h) |
| | pH | | 9.20 | 9.10 | 8.60 | 8.50 | | Conductivity | mS m−1 | 2,870 | 2,830 | 2,810 | 2,770 | | Chemical oxygen demand (COD) | mg L−1 | 27,603 | 22,694 | 21,384 | 15,181 | | Biochemical oxygen demand (BOD) | mg L−1 | 10,433 | — | — | 8,900 | | Nitrates (N–NO3) | mg L−1 | 6.13 | — | — | 6.76 | | Total phosphorous | mg L−1 | 93.91 | — | — | 91.15 | | Sulfate ion (SO2-4) | mg L−1 | 1,161 | — | — | 3,592 | | Alkalinity | mg L−1 CaCO3 | 3,574 | — | — | 3,772 | | Chlorides | mg L−1 | 10,616 | — | — | 9,466 | | Total dissolved solids (TDS) | mg L−1 | 30,540 | — | — | 27,900 | | Total suspended solids (TSS) | mg L−1 | 3,320 | — | — | 1,640 |
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