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Open AccessArticle

Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater

1
DCU Water Institute, School of Chemical Science, Dublin City University, D09V209 Dublin 9, Ireland
2
DCU Water Institute, School of Biotechnology, Dublin City University, D09V209 Dublin 9, Ireland
3
DCU Water Institute, School of Mechanical & Manufacturing Engineering, Dublin City University, D09V209 Dublin 9, Ireland
4
ABP Food Group, E21D588 Kilcommon, Ireland
5
Qatar Energy and Environmental Research Institute, Hamad bin Khalifa University, Doha, P.O. Box 34110, Qatar
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(11), 3914; https://doi.org/10.3390/ijms21113914
Received: 30 April 2020 / Revised: 20 May 2020 / Accepted: 22 May 2020 / Published: 30 May 2020
(This article belongs to the Special Issue Ion and Molecule Transport in Membrane Systems 2.0)
Hydrophobic membrane contactors represent a promising solution to the problem of recycling ammoniacal nitrogen (N-NH4) molecules from waste, water or wastewater resources. The process has been shown to work best with wastewater streams that present high N-NH4 concentrations, low buffering capacities and low total suspended solids. The removal of N-NH4 from rendering condensate, produced during heat treatment of waste animal tissue, was assessed in this research using a hydrophobic membrane contactor. This study investigates how the molecular composition of rendering condensate wastewater undergo changes in its chemistry in order to achieve suitability to be treated using hydrophobic membranes and form a suitable product. The main objective was to test the ammonia stripping technology using two types of hydrophobic membrane materials, polypropylene (PP) and polytetrafluoroethylene (PTFE) at pilot scale and carry out: (i) Process modification for NH3 molecule removal and (ii) product characterization from the process. The results demonstrate that PP membranes are not compatible with the condensate waste as it caused wetting. The PTFE membranes showed potential and had a longer lifetime than the PP membranes and removed up to 64% of NH3 molecules from the condensate waste. The product formed contained a 30% concentrated ammonium sulphate salt which has a potential application as a fertilizer. This is the first demonstration of hydrophobic membrane contactors for treatment of condensate wastewater. View Full-Text
Keywords: ammonia; hydrophobic; membranes; polypropylene; polytetrafluoroethylene; rendering condensate; wastewater ammonia; hydrophobic; membranes; polypropylene; polytetrafluoroethylene; rendering condensate; wastewater
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MDPI and ACS Style

Brennan, B.; Briciu-Burghina, C.; Hickey, S.; Abadie, T.; al Ma Awali, S.M.; Delaure, Y.; Durkan, J.; Holland, L.; Quilty, B.; Tajparast, M.; Pulit, C.; Fitzsimons, L.; Nolan, K.; Regan, F.; Lawler, J. Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater. Int. J. Mol. Sci. 2020, 21, 3914. https://doi.org/10.3390/ijms21113914

AMA Style

Brennan B, Briciu-Burghina C, Hickey S, Abadie T, al Ma Awali SM, Delaure Y, Durkan J, Holland L, Quilty B, Tajparast M, Pulit C, Fitzsimons L, Nolan K, Regan F, Lawler J. Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater. International Journal of Molecular Sciences. 2020; 21(11):3914. https://doi.org/10.3390/ijms21113914

Chicago/Turabian Style

Brennan, Brian; Briciu-Burghina, Ciprian; Hickey, Sean; Abadie, Thomas; al Ma Awali, Sultan M.; Delaure, Yan; Durkan, John; Holland, Linda; Quilty, Brid; Tajparast, Mohammad; Pulit, Casper; Fitzsimons, Lorna; Nolan, Kieran; Regan, Fiona; Lawler, Jenny. 2020. "Pilot Scale Study: First Demonstration of Hydrophobic Membranes for the Removal of Ammonia Molecules from Rendering Condensate Wastewater" Int. J. Mol. Sci. 21, no. 11: 3914. https://doi.org/10.3390/ijms21113914

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