Oxidative co-treatment using hydrogen peroxide with anaerobic digestion of excess municipal sludge.
The effect of an oxidative co-treatment on anaerobic digestion of a mixture of primary and waste activated sludge was investigated. The oxidant used in this study was hydrogen peroxide (H2O2). A maximum improvement in solid destruction of 15.2% was achieved in the overall process, with a dosage of 2.0 g H2O2/g influent volatile suspended solids (VSS(influent)). All configurations operated at this dosage also showed statistically significant increases in solids removal. A statistically significant enhancement in overall solids destruction was observed for the lower oxidant dosage (0.5 H2O2/g VSS(influent)). Surprisingly, for 1.0 g H2O2/g VSS(influent), only one of the three configurations involving oxidative co-treatment showed significant increases in solids destruction. Special attention was paid to the performance of this process relative to fecal coliforms destruction. Class A biosolids were obtained for all the different hydrogen peroxide dosages used when oxidative co-treatment is combined with a two-stage anaerobic digestion process.
Cacho Rivero
Jesus A
JA
Department of Civil and Environmental Engineering, University of Cincinnati, Ohio 45221-0071, USA.
Madhavan
Narain
N
Suidan
Makram T
MT
Ginestet
Philippe
P
Audic
Jean-Marc
JM
D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D016877:Oxidants / Q000494:pharmacology*; D010084:Oxidation-Reduction; D012037:Refuse Disposal; D012722:Sewage; D014865:Waste Disposal, Fluid
D016877:Oxidants; D012722:Sewage; D006861:Hydrogen Peroxide