Treatment of petroleum wastewater using a sequential hybrid system of electro-Fenton and NZVI slurry reactors, future prospects for an emerging wastewater treatment technology Online publication date: Mon, 25-Oct-2021
by Mirmehdi Seyyedi; Bita Ayati
International Journal of Environment and Waste Management (IJEWM), Vol. 28, No. 3, 2021
Abstract: In this study, treatment of a 750 mL petroleum wastewater sample was evaluated using a hybrid system consisting of electro-Fenton and nano zero-valent iron (NZVI) slurry reactors in sequence. In both systems, effective parameters were optimised by one-factor-at-a-time (OFAT) method considering energy consumption and treatment efficiency. For the slurry reactor, nanoparticles were first synthesised and then used in the reactor to treat the wastewater. Both systems were first optimised separately and the hybrid complex was designed based on the sub-systems optimum conditions. As for the electro-Fenton reactor, maximum COD removal efficiency of 92.78% was achieved in 75 minutes once having optimum initial pH and current values of 3 and 0.5 A respectively. In the slurry reactor, COD removal efficiency of 86.94% was achieved in 60 minutes while having 0.1 g/L of NZVI concentration and neutral initial pH as components of optimum parametric condition. Finally, in the hybrid system, a higher COD removal efficiency of 93.46% was achieved in only 47 minutes. Moreover, consumed energy for achieving the mentioned efficiency was 12.672 KJ being 40% less than that of single electro-Fenton system.
Online publication date: Mon, 25-Oct-2021
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Waste Management (IJEWM):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email email@example.com