Effects of sponge size and type on the performance of an up-flow sponge bioreactor in primary treated sewage effluent treatment.
The effects of polyurethane sponge size and type on the performance of an up-flow sponge bioreactor were studied using different sponge cube sizes (1 x 1 x 1 cm, 2 x 2 x 2 cm and 3 x 3 x 3 cm) and types of sponge (S28-30/45R, S28-30/60R, S28-30/80R and S28-30/90R). The reactors were operated under anaerobic conditions in an early stage and an aerobic condition in a latter stage. The results indicate that there was no significant difference in the organic and nutrient removal rates between sponge types. The medium size sponge (2 x 2 x 2 cm) had the best performance in terms of both biomass growth and pollutants removal. Under anaerobic condition, the COD, TN and TP removal efficiencies were up to 70%, 45% and 55%, respectively, and significantly improved under aerobic conditions (e.g. >90% TOC, 95% COD, 65% TN and 90% TP). The external biomass grew faster under anaerobic conditions while internal biomass was dominant under aerobic condition.
Nguyen
Tien Thanh
TT
School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
Ngo
Huu Hao
HH
Guo
Wenshan
W
Johnston
Archie
A
Listowski
Andrzej
A
D000693:Anaerobiosis; D000818:Animals; D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology / Q000592:standards*; D009584:Nitrogen / Q000302:isolation & purification; D009930:Organic Chemicals / Q000302:isolation & purification; D010100:Oxygen / Q000302:isolation & purification; D010758:Phosphorus / Q000302:isolation & purification; D011140:Polyurethanes / Q000737:chemistry*; D011161:Porifera / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000295:instrumentation*; D018508:Water Purification / Q000295:instrumentation*
D009930:Organic Chemicals; D011140:Polyurethanes; D012722:Sewage; D010758:Phosphorus; D009584:Nitrogen; D010100:Oxygen