International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
Vol. 11, No. 3, 2014, pp. 731-738
Bioline Code: st14072
Full paper language: English
Document type: Research Article
Document available free of charge
International Journal of Environment Science and Technology, Vol. 11, No. 3, 2014, pp. 731-738
© International Journal of Environment Science and Technology
Pretreatment of high strength waste emulsions by combined vibratory shear enhanced process with Fenton oxidation|
Zhang, W. J.; Zhang, M.; Xiao, F.; Fang, L. P. & Wang, D. S.
Pretreatment of waste emulsions with high
organic content by a combined process of vibratory shear
enhanced process and Fenton’s oxidation prior to biological
treatment was investigated. Vibrating membrane had shown
good performance in chemical oxygen demand and oil
removals and the mitigation of concentration polarization.
However, the permeate after filtration processing still contained
high content of organics. Thus, additional Fenton
oxidation was applied to reduce the organic loading, and
improve the biodegradability of the wastewater. The optimal
molar ratio of ferrous iron to hydrogen peroxide was 0.05
obtained from the jar-test experiments. Removal of organics
was enhanced by increasing hydrogen peroxide dosage,
while efficiency of hydrogen peroxide reached maximum of
1.11(w/w) at the hydrogen peroxide dosage of 6.8 g/L.
Furthermore, the biological experiments indicated that the
high concentration of organics could inhibit microbial
activity, which decreased the chemical oxygen demand
degradation rates. The adaptive period of the microbe was
greatly shortened using Fenton’s reagent at the low dosages.
The improvement of the biodegradability could be explained
by partial mineralization and chemical transformation of
parent organic compounds after Fenton oxidation.
Aerobic batch bioassay; Hydroxyl radical; Industrial wastewater; Integrated process; Ultrafiltration
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