Degradation of formaldehyde in anaerobic sequencing batch biofilm reactor (ASBBR)

Journal of Hazardous Materials
N S Pereira, M Zaiat

Abstract

The present study evaluated the degradation of formaldehyde in a bench-scale anaerobic sequencing batch reactor, which contained biomass immobilized in polyurethane foam matrices. The reactor was operated for 212 days at 35 degrees C with 8h sequential cycles, under different affluent formaldehyde concentrations ranging from 31.6 to 1104.4 mg/L (formaldehyde loading rates from 0.08 to 2.78 kg/m(3)day). The results indicate excellent reactor stability and over 99% efficiency in formaldehyde removal, with average effluent formaldehyde concentration of 3.6+/-1.7 mg/L. Formaldehyde degradation rates increased from 204.9 to 698.3mg/Lh as the initial concentration of formaldehyde was increased from around 100 to around 1100 mg/L. However, accumulation of organic matter was observed in the effluent (chemical oxygen demand (COD) values above 500 mg/L) due to the presence of non-degraded organic acids, especially acetic and propionic acids. This observation poses an important question regarding the anaerobic route of formaldehyde degradation, which might differ substantially from that reported in the literature. The anaerobic degradation pathway can be associated with the formation of long-chain oligomers from formaldehyde. Such long- o...Continue Reading

References

May 1, 1971·Analytical Chemistry·B W Bailey, J M Rankin
Feb 6, 2002·Water Research·Hesham R Lotfy, I G Rashed
Jul 13, 2002·Biotechnology and Bioengineering·G Gonzalez-GilG Lettinga
Mar 18, 2004·Water Research·S V W B OliveiraM Zaiat
Jul 19, 2008·Biotechnology and Bioengineering·M Qu, S K Bhattacharya

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Citations

May 19, 2012·Journal of Environmental Management·José Roberto GuimarãesPedro Sérgio Fadini
Jan 27, 2015·Applied Microbiology and Biotechnology·M PronkM C M van Loosdrecht
Jul 28, 2016·Bioscience, Biotechnology, and Biochemistry·Hiroshi YonemitsuKoji Hori
Mar 14, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Qian ZhaoNan Li

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