Sequential Combination of Electro-Fenton and Electrochemical Chlorination Processes for the Treatment of Anaerobically-Digested Food Wastewater

Yong Uk Shin, Ha Young Yoo, Seonghun Kim, Kyung Mi Chung, Yong Gyun Park, Kwang Hyun Hwang, Seok Won Hong, Hyunwoong Park, Kangwoo Cho, Jaesang Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A two-stage sequential electro-Fenton (E-Fenton) oxidation followed by electrochemical chlorination (EC) was demonstrated to concomitantly treat high concentrations of organic carbon and ammonium nitrogen (NH4 +-N) in real anaerobically digested food wastewater (ADFW). The anodic Fenton process caused the rapid mineralization of phenol as a model substrate through the production of hydroxyl radical as the main oxidant. The electrochemical oxidation of NH4 + by a dimensionally stable anode (DSA) resulted in temporal concentration profiles of combined and free chlorine species that were analogous to those during the conventional breakpoint chlorination of NH4 +. Together with the minimal production of nitrate, this confirmed that the conversion of NH4 + to nitrogen gas was electrochemically achievable. The monitoring of treatment performance with varying key parameters (e.g., current density, H2O2 feeding rate, pH, NaCl loading, and DSA type) led to the optimization of two component systems. The comparative evaluation of two sequentially combined systems (i.e., the E-Fenton-EC system versus the EC-E-Fenton system) using the mixture of phenol and NH4 + under the predetermined optimal conditions suggested the superiority of the E-Fenton-EC system in terms of treatment efficiency and energy consumption. Finally, the sequential E-Fenton-EC process effectively mineralized organic carbon and decomposed NH4 +-N in the real ADFW without external supply of NaCl.

Original languageEnglish
Pages (from-to)10700-10710
Number of pages11
JournalEnvironmental Science and Technology
Volume51
Issue number18
DOIs
Publication statusPublished - 2017 Sep 19

Fingerprint

Chlorination
Halogenation
chlorination
Waste Water
Wastewater
wastewater
Food
food
Organic carbon
Phenol
phenol
Anodes
Electrodes
Nitrogen
Carbon
organic carbon
oxidation
Electrooxidation
Electrochemical oxidation
nitrogen

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Sequential Combination of Electro-Fenton and Electrochemical Chlorination Processes for the Treatment of Anaerobically-Digested Food Wastewater. / Shin, Yong Uk; Yoo, Ha Young; Kim, Seonghun; Chung, Kyung Mi; Park, Yong Gyun; Hwang, Kwang Hyun; Hong, Seok Won; Park, Hyunwoong; Cho, Kangwoo; Lee, Jaesang.

In: Environmental Science and Technology, Vol. 51, No. 18, 19.09.2017, p. 10700-10710.

Research output: Contribution to journalArticle

Shin, Yong Uk ; Yoo, Ha Young ; Kim, Seonghun ; Chung, Kyung Mi ; Park, Yong Gyun ; Hwang, Kwang Hyun ; Hong, Seok Won ; Park, Hyunwoong ; Cho, Kangwoo ; Lee, Jaesang. / Sequential Combination of Electro-Fenton and Electrochemical Chlorination Processes for the Treatment of Anaerobically-Digested Food Wastewater. In: Environmental Science and Technology. 2017 ; Vol. 51, No. 18. pp. 10700-10710.
@article{37d6fba273164abdbc3aa559dee23e39,
title = "Sequential Combination of Electro-Fenton and Electrochemical Chlorination Processes for the Treatment of Anaerobically-Digested Food Wastewater",
abstract = "A two-stage sequential electro-Fenton (E-Fenton) oxidation followed by electrochemical chlorination (EC) was demonstrated to concomitantly treat high concentrations of organic carbon and ammonium nitrogen (NH4 +-N) in real anaerobically digested food wastewater (ADFW). The anodic Fenton process caused the rapid mineralization of phenol as a model substrate through the production of hydroxyl radical as the main oxidant. The electrochemical oxidation of NH4 + by a dimensionally stable anode (DSA) resulted in temporal concentration profiles of combined and free chlorine species that were analogous to those during the conventional breakpoint chlorination of NH4 +. Together with the minimal production of nitrate, this confirmed that the conversion of NH4 + to nitrogen gas was electrochemically achievable. The monitoring of treatment performance with varying key parameters (e.g., current density, H2O2 feeding rate, pH, NaCl loading, and DSA type) led to the optimization of two component systems. The comparative evaluation of two sequentially combined systems (i.e., the E-Fenton-EC system versus the EC-E-Fenton system) using the mixture of phenol and NH4 + under the predetermined optimal conditions suggested the superiority of the E-Fenton-EC system in terms of treatment efficiency and energy consumption. Finally, the sequential E-Fenton-EC process effectively mineralized organic carbon and decomposed NH4 +-N in the real ADFW without external supply of NaCl.",
author = "Shin, {Yong Uk} and Yoo, {Ha Young} and Seonghun Kim and Chung, {Kyung Mi} and Park, {Yong Gyun} and Hwang, {Kwang Hyun} and Hong, {Seok Won} and Hyunwoong Park and Kangwoo Cho and Jaesang Lee",
year = "2017",
month = "9",
day = "19",
doi = "10.1021/acs.est.7b02018",
language = "English",
volume = "51",
pages = "10700--10710",
journal = "Environmental Science and Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "18",

}

TY - JOUR

T1 - Sequential Combination of Electro-Fenton and Electrochemical Chlorination Processes for the Treatment of Anaerobically-Digested Food Wastewater

AU - Shin, Yong Uk

AU - Yoo, Ha Young

AU - Kim, Seonghun

AU - Chung, Kyung Mi

AU - Park, Yong Gyun

AU - Hwang, Kwang Hyun

AU - Hong, Seok Won

AU - Park, Hyunwoong

AU - Cho, Kangwoo

AU - Lee, Jaesang

PY - 2017/9/19

Y1 - 2017/9/19

N2 - A two-stage sequential electro-Fenton (E-Fenton) oxidation followed by electrochemical chlorination (EC) was demonstrated to concomitantly treat high concentrations of organic carbon and ammonium nitrogen (NH4 +-N) in real anaerobically digested food wastewater (ADFW). The anodic Fenton process caused the rapid mineralization of phenol as a model substrate through the production of hydroxyl radical as the main oxidant. The electrochemical oxidation of NH4 + by a dimensionally stable anode (DSA) resulted in temporal concentration profiles of combined and free chlorine species that were analogous to those during the conventional breakpoint chlorination of NH4 +. Together with the minimal production of nitrate, this confirmed that the conversion of NH4 + to nitrogen gas was electrochemically achievable. The monitoring of treatment performance with varying key parameters (e.g., current density, H2O2 feeding rate, pH, NaCl loading, and DSA type) led to the optimization of two component systems. The comparative evaluation of two sequentially combined systems (i.e., the E-Fenton-EC system versus the EC-E-Fenton system) using the mixture of phenol and NH4 + under the predetermined optimal conditions suggested the superiority of the E-Fenton-EC system in terms of treatment efficiency and energy consumption. Finally, the sequential E-Fenton-EC process effectively mineralized organic carbon and decomposed NH4 +-N in the real ADFW without external supply of NaCl.

AB - A two-stage sequential electro-Fenton (E-Fenton) oxidation followed by electrochemical chlorination (EC) was demonstrated to concomitantly treat high concentrations of organic carbon and ammonium nitrogen (NH4 +-N) in real anaerobically digested food wastewater (ADFW). The anodic Fenton process caused the rapid mineralization of phenol as a model substrate through the production of hydroxyl radical as the main oxidant. The electrochemical oxidation of NH4 + by a dimensionally stable anode (DSA) resulted in temporal concentration profiles of combined and free chlorine species that were analogous to those during the conventional breakpoint chlorination of NH4 +. Together with the minimal production of nitrate, this confirmed that the conversion of NH4 + to nitrogen gas was electrochemically achievable. The monitoring of treatment performance with varying key parameters (e.g., current density, H2O2 feeding rate, pH, NaCl loading, and DSA type) led to the optimization of two component systems. The comparative evaluation of two sequentially combined systems (i.e., the E-Fenton-EC system versus the EC-E-Fenton system) using the mixture of phenol and NH4 + under the predetermined optimal conditions suggested the superiority of the E-Fenton-EC system in terms of treatment efficiency and energy consumption. Finally, the sequential E-Fenton-EC process effectively mineralized organic carbon and decomposed NH4 +-N in the real ADFW without external supply of NaCl.

UR - http://www.scopus.com/inward/record.url?scp=85029708604&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85029708604&partnerID=8YFLogxK

U2 - 10.1021/acs.est.7b02018

DO - 10.1021/acs.est.7b02018

M3 - Article

C2 - 28792745

AN - SCOPUS:85029708604

VL - 51

SP - 10700

EP - 10710

JO - Environmental Science and Technology

JF - Environmental Science and Technology

SN - 0013-936X

IS - 18

ER -