Electrochemically-assisted ammonia recovery from wastewater using a floating electrode

Tim Muster, Johannes Jermakka

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

A novel methodology for the removal and recovery of NH 3 from wastewater based upon electrochemical oxidation and a previously unreported electrochemically-assisted surface transfer mechanism is introduced. Recovery of NH 3 is done by placing a porous cathodic electrode at the wastewater-air interface wherein the cathode creates local alkalinity and an electric field that draws ammonium ions towards the wastewater-air interface resulting in near-linear reductions of dissolved ammonium irrespective of concentration. This methodology resulted in great NH 3 recovery without the need for ion-exchange membranes. Also anodic reactions that simultaneously occur at depth in the wastewater induced NH 3 oxidation in accordance with proven mechanisms. The floating electrode approach offers improved NH 3 removal efficiency in comparison to electrooxidation. Trials conducted on synthetic wastewater and filtered anaerobic centrate demonstrated decreased NH 3 concentration up to 216 mg/l-hr and 110 mg/l-hr respectively under 5 mA/cm 2 current density. The technology would be best used to treat municipal and industrial wastewaters possessing high NH 3 concentration.

Original languageEnglish
Pages (from-to)1804-1811
Number of pages8
JournalWater Science and Technology
Volume75
Issue number8
DOIs
Publication statusPublished - 1 Apr 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Ammonia
electrode
Wastewater
ammonia
wastewater
Recovery
Electrodes
ammonium
Ion exchange membranes
oxidation
methodology
Electrooxidation
Electrochemical oxidation
air
Alkalinity
Air
density current
alkalinity
electric field
ion exchange

Keywords

  • air-stripping
  • ammonia recovery
  • electrochemical nutrient removal
  • electrochemical oxidation
  • resource recovery
  • wastewater treatment

Cite this

Muster, Tim ; Jermakka, Johannes. / Electrochemically-assisted ammonia recovery from wastewater using a floating electrode. In: Water Science and Technology. 2017 ; Vol. 75, No. 8. pp. 1804-1811.
@article{61f52c869fdb4cd0b187f9db8bd88c52,
title = "Electrochemically-assisted ammonia recovery from wastewater using a floating electrode",
abstract = "A novel methodology for the removal and recovery of NH 3 from wastewater based upon electrochemical oxidation and a previously unreported electrochemically-assisted surface transfer mechanism is introduced. Recovery of NH 3 is done by placing a porous cathodic electrode at the wastewater-air interface wherein the cathode creates local alkalinity and an electric field that draws ammonium ions towards the wastewater-air interface resulting in near-linear reductions of dissolved ammonium irrespective of concentration. This methodology resulted in great NH 3 recovery without the need for ion-exchange membranes. Also anodic reactions that simultaneously occur at depth in the wastewater induced NH 3 oxidation in accordance with proven mechanisms. The floating electrode approach offers improved NH 3 removal efficiency in comparison to electrooxidation. Trials conducted on synthetic wastewater and filtered anaerobic centrate demonstrated decreased NH 3 concentration up to 216 mg/l-hr and 110 mg/l-hr respectively under 5 mA/cm 2 current density. The technology would be best used to treat municipal and industrial wastewaters possessing high NH 3 concentration.",
keywords = "air-stripping, ammonia recovery, electrochemical nutrient removal, electrochemical oxidation, resource recovery, wastewater treatment",
author = "Tim Muster and Johannes Jermakka",
year = "2017",
month = "4",
day = "1",
doi = "10.2166/wst.2017.060",
language = "English",
volume = "75",
pages = "1804--1811",
journal = "Water Science and Technology",
issn = "0273-1223",
publisher = "IWA Publishing",
number = "8",

}

Electrochemically-assisted ammonia recovery from wastewater using a floating electrode. / Muster, Tim; Jermakka, Johannes.

In: Water Science and Technology, Vol. 75, No. 8, 01.04.2017, p. 1804-1811.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Electrochemically-assisted ammonia recovery from wastewater using a floating electrode

AU - Muster, Tim

AU - Jermakka, Johannes

PY - 2017/4/1

Y1 - 2017/4/1

N2 - A novel methodology for the removal and recovery of NH 3 from wastewater based upon electrochemical oxidation and a previously unreported electrochemically-assisted surface transfer mechanism is introduced. Recovery of NH 3 is done by placing a porous cathodic electrode at the wastewater-air interface wherein the cathode creates local alkalinity and an electric field that draws ammonium ions towards the wastewater-air interface resulting in near-linear reductions of dissolved ammonium irrespective of concentration. This methodology resulted in great NH 3 recovery without the need for ion-exchange membranes. Also anodic reactions that simultaneously occur at depth in the wastewater induced NH 3 oxidation in accordance with proven mechanisms. The floating electrode approach offers improved NH 3 removal efficiency in comparison to electrooxidation. Trials conducted on synthetic wastewater and filtered anaerobic centrate demonstrated decreased NH 3 concentration up to 216 mg/l-hr and 110 mg/l-hr respectively under 5 mA/cm 2 current density. The technology would be best used to treat municipal and industrial wastewaters possessing high NH 3 concentration.

AB - A novel methodology for the removal and recovery of NH 3 from wastewater based upon electrochemical oxidation and a previously unreported electrochemically-assisted surface transfer mechanism is introduced. Recovery of NH 3 is done by placing a porous cathodic electrode at the wastewater-air interface wherein the cathode creates local alkalinity and an electric field that draws ammonium ions towards the wastewater-air interface resulting in near-linear reductions of dissolved ammonium irrespective of concentration. This methodology resulted in great NH 3 recovery without the need for ion-exchange membranes. Also anodic reactions that simultaneously occur at depth in the wastewater induced NH 3 oxidation in accordance with proven mechanisms. The floating electrode approach offers improved NH 3 removal efficiency in comparison to electrooxidation. Trials conducted on synthetic wastewater and filtered anaerobic centrate demonstrated decreased NH 3 concentration up to 216 mg/l-hr and 110 mg/l-hr respectively under 5 mA/cm 2 current density. The technology would be best used to treat municipal and industrial wastewaters possessing high NH 3 concentration.

KW - air-stripping

KW - ammonia recovery

KW - electrochemical nutrient removal

KW - electrochemical oxidation

KW - resource recovery

KW - wastewater treatment

UR - http://www.scopus.com/inward/record.url?scp=85024482740&partnerID=8YFLogxK

U2 - 10.2166/wst.2017.060

DO - 10.2166/wst.2017.060

M3 - Article

VL - 75

SP - 1804

EP - 1811

JO - Water Science and Technology

JF - Water Science and Technology

SN - 0273-1223

IS - 8

ER -