Hydrogen Gas Recycling for Energy Efficient Ammonia Recovery in Electrochemical Systems.
Recycling of hydrogen gas (H2) produced at the cathode to the anode in an electrochemical system allows for energy efficient TAN (Total Ammonia Nitrogen) recovery. Using a H2recycling electrochemical system (HRES) we achieved high TAN transport rates at low energy input. At a current density of 20 A m-2, TAN removal rate from the influent was 151 gNm-2d-1at an energy demand of 26.1 kJ gN-1. The maximum TAN transport rate of 335 gNm-2d-1was achieved at a current density of 50 A m-2and an energy demand of 56.3 kJ gN-1. High TAN removal efficiency (73-82%) and recovery (60-73%) were reached in all experiments. Therefore, our HRES is a promising alternative for electrochemical and bioelectrochemical TAN recovery. Advantages are the lower energy input and lower risk of chloride oxidation compared to electrochemical technologies and high rates and independence of organic matter compared to bioelectrochemical systems.
Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911MA Leeuwarden, The Netherlands.
Philipp
0000-0002-2342-8662
P
Kuntke
Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911MA Leeuwarden, The Netherlands.|Sub-Department of Environmental Technology, Wageningen University , Bornse Weilanden 9, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
Mariana
M
Rodríguez Arredondo
Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911MA Leeuwarden, The Netherlands.
Laksminarastri
L
Widyakristi
Sub-Department of Environmental Technology, Wageningen University , Bornse Weilanden 9, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
Annemiek
A
Ter Heijne
Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911MA Leeuwarden, The Netherlands.
Tom H J A
0000-0001-8251-7879
TH
Sleutels
Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911MA Leeuwarden, The Netherlands.
Hubertus V M
0000-0002-0990-4773
HV
Hamelers
Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911MA Leeuwarden, The Netherlands.|Sub-Department of Environmental Technology, Wageningen University , Bornse Weilanden 9, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
Cees J N
CJ
Buisman
D000641:Ammonia; D004566:Electrodes; D006859:Hydrogen; D010084:Oxidation-Reduction
D000641:Ammonia; D006859:Hydrogen