Coke Plant Wastewater Posttreatment by Fenton and Electro-Fenton Processes

PengRuichao,; Yuping,; LuoYunbai,

doi:10.1089/ees.2015.0520

Cited by 9 publications

(2 citation statements)

References 26 publications

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“…Generally, a longer reaction time is advantageous for the removal of contaminants, while further extension of the reaction time does not significantly improve the removal. [20,[22][23] The results basically conformed to this rule. Nevertheless, in our follow-up experiment, after 150 min, the COD concentration was slightly higher than that at 120 min (5% increase), which demonstrated the equilibrium limitation in stage III, and with further extension of reaction time, desorption dominates the process.…”

Section: Effect Of Reaction Time On Cod Removalsupporting

confidence: 78%

COD removal from actual industrial wastewater using a three‐dimensional electrochemical apparatus

Wenqiang

Jiang

2022

Can J Chem Eng

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Chemical oxygen demand (COD) removal was investigated using a threedimensional electrochemical system. The effects of electrode position, pH value, initial temperature, circulation flow, aeration, and addition of hydrogen peroxide on the removal efficiency of the pollutant were studied. The fillers used in the experiment were centimetre-sized and electrolyte was obtained from an industrial factory with a concentration of COD as high as 25 000-27 500 mg L À1 , which was rare in other studies of the past. The degradation of organics was affected by pH and circulation flow, and a decrease in the initial pH value led to the increase in removal efficiency, while a trend of increasing at first and then decreasing was observed with the extension of circulation flow. Aeration and hydrogen peroxide served as enhanced processes for a higher removal rate. Both ultrasound and ultraviolet had effects on the electrolysis system. Oxygen uptake rate measurement and bio-treatment experiments demonstrated a significant increase in biodegradability with this threedimensional electrochemical system. In addition, a pilot scale test in a pharmaceutical factory showed an economic benefit on energy consumption, which was as low as 10 kWh kg À1 COD.

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Section: Effect Of Reaction Time On Cod Removalsupporting

confidence: 78%

COD removal from actual industrial wastewater using a three‐dimensional electrochemical apparatus

Wenqiang

Jiang

2022

Can J Chem Eng

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“…2c. With the increase in H 2 O 2 dosage, effluent COD of the coking wastewater decreased due to the higher concentration of hydrogen peroxide that can produce more •OH (Peng et al 2017;Zhu et al 2011). At the same time, excessive concentration of H 2 O 2 is not an option considering the cost factor.…”

Section: Enhancing Effect Of Mn Ore Tailings On Fenton and Ozonationmentioning

confidence: 99%

High increase in biodegradability of coking wastewater enhanced by Mn ore tailings in Fenton/O3 combined processes

Liu

et al. 2020

Int. J. Environ. Sci. Technol.

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Coking wastewater contains high concentration of organic pollutants and seriously endangers the natural ecological balance and human health. This study proposes a novel pre-treatment method that can significantly improve removal efficiency of organic pollutants in coking wastewater by the concept of "treating waste with waste." Three two-step advanced oxidation processes were proposed by combining Fenton, ozonation with manganese tailings: (i) O 3 /Mn tailings + H 2 O 2 , (ii) O 3 /Mn tailings + Fenton and (iii) Fenton + O 3 /Mn tailings. Results show that (1) Fenton + O 3 /Mn tailings presented the best removal efficiency in the three combined processes. The reaction process was carried out by first performing Fenton reaction on the wastewater for 65 min, and then, the reaction wastewater was subjected to ozone and manganese tailings mixed reaction for 30 min, and the chemical oxygen demand (COD) and chromaticity were reduced by 61.0% and 96.1%, respectively. (2) After pre-treated with Fenton, the biodegradability of the wastewater can be significantly increased. When Fenton + O 3 /Mn ore tailings were used to pre-treat the raw water, the biodegradability (BOD 5 /COD) of the wastewater was increased to 0.54. It is proved that the combined process Fenton + O 3 /Mn ore tailings has better performance than the ordinary single advanced oxidation process. Compared with the existing methods, the addition of manganese tailings containing manganese oxides as catalytic free radicals can significantly improve the treatment activity of advanced oxidation process (AOPS).

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Coke Making: Most Efficient Technologies for Greenhouse Emissions Abatement

Cavaliere

2019

Clean Ironmaking and Steelmaking Processes

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Coke Plant Wastewater Posttreatment by Fenton and Electro-Fenton Processes

Cited by 9 publications

References 26 publications

COD removal from actual industrial wastewater using a three‐dimensional electrochemical apparatus

COD removal from actual industrial wastewater using a three‐dimensional electrochemical apparatus

High increase in biodegradability of coking wastewater enhanced by Mn ore tailings in Fenton/O3 combined processes

Coke Making: Most Efficient Technologies for Greenhouse Emissions Abatement

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