| Flow-through Anaerobic Viable DIRB 7 days | Batch Anaerobic Viable DIRB 4 hours | Batch Anaerobic Viable DIRB 7 days | Batch Anaerobic Killed DIRB 7 days | Batch Aerobic Viable DIRB 7 days |
---|---|---|---|---|---|
Primary TEA | Fe(III) | Fe(III) | Fe(III) | N/A | O2 |
Extent of Fe reduction | 7 % ± 1 % | 0.1 %–0.2 % | 4.4%–4.6% | 0.3–1.2% | 0.1–0.5% |
Phases present | Â | Â | Â | Â | Â |
   Poorly crystalline smectite | Not found | Yes | Yes | Yes | Yes |
   Amorphous aluminosilicate with increased Al/Si | Yes | Not found | Not found | Not found | Yes |
Amorphous Si | Yes | Yes | Yes | Yes | Yes |