Hello Ivo. We still ignore BOD(5 or 20) but, ANA is effective at these low flowrates even at COD as low as 2000ppm, indeed. When target is not Biogas production, ANA process also promotes a very helpful conversion of insoluble COD into soluble COD, which could be easily treated in any aerobic activated sludge unit downstream (as suggested). I would easily expect minumum 35-40% COD removal from ANA unless more, it all depending on OLR chosen and COD/BOD ratio of the influent (lot of case studies are and, due to the low flowrate indicated, experimental studies could be easily applied here) We treat textile effluents anaerobically first: COD drops from 2000ppm to 900ppm in just 12hrs with just Hybrid ABR, while BOD/COD ratio rises from 0.3 to 0.4/0.5 resulting in smaller aerobics downstream. More info could be beneficial, though. Regards Tiziano
Published by Ing.Tiziano Zampollo, Employee at Water Engineers & Consultants - WEnCo
Hello Ivo. We still ignore BOD(5 or 20) but, ANA is effective at these low flowrates even at COD as low as 2000ppm, indeed.
When target is not Biogas production, ANA process also promotes a very helpful conversion of insoluble COD into soluble COD, which could be easily treated in any aerobic activated sludge unit downstream (as suggested).
I would easily expect minumum 35-40% COD removal from ANA unless more, it all depending on OLR chosen and COD/BOD ratio of the influent (lot of case studies are and, due to the low flowrate indicated, experimental studies could be easily applied here)
We treat textile effluents anaerobically first: COD drops from 2000ppm to 900ppm in just 12hrs with just Hybrid ABR, while BOD/COD ratio rises from 0.3 to 0.4/0.5 resulting in smaller aerobics downstream.
More info could be beneficial, though.
Regards
Tiziano
When target is not Biogas production, ANA process also promotes a very helpful conversion of insoluble COD into soluble COD, which could be easily treated in any aerobic activated sludge unit downstream (as suggested).
I would easily expect minumum 35-40% COD removal from ANA unless more, it all depending on OLR chosen and COD/BOD ratio of the influent (lot of case studies are and, due to the low flowrate indicated, experimental studies could be easily applied here)
We treat textile effluents anaerobically first: COD drops from 2000ppm to 900ppm in just 12hrs with just Hybrid ABR, while BOD/COD ratio rises from 0.3 to 0.4/0.5 resulting in smaller aerobics downstream.
More info could be beneficial, though.
Regards
Tiziano