Peter Desmond

Peter Desmond
RWTH Aachen University

Dr. Sc. ETH

About

14
Publications
4,853
Reads
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496
Citations
Citations since 2016
13 Research Items
487 Citations
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2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
Introduction
Biofilm and membrane based water reuse and resource recovery
Additional affiliations
September 2018 - December 2020
MMS AG
Position
  • Group Leader
May 2014 - April 2018
Eawag: Das Wasserforschungs-Institut des ETH-Bereichs
Position
  • Engineer
Education
May 2014 - May 2018
ETH Zurich
Field of study
  • Environmental Engineering
September 2012 - December 2014
University College Dublin
Field of study
  • Biotechnology and Business (Double masters)
September 2008 - September 2012
Trinity College Dublin
Field of study
  • Natural Sciences, Molecular Microbiology

Publications

Publications (14)
Article
The application of membrane technology for water treatment and reuse is hampered by the development of a microbial biofilm. Biofilm growth in micro-and ultrafiltration (MF/UF) membrane modules, on both the membrane surface and feed spacer, can form a secondary membrane and exert resistance to permeation and crossflow, increasing energy demand and d...
Article
Full-text available
We evaluated how intermittent shear influences the physical structure, material properties and hydraulic resistance of membrane biofilms developed during gravity-driven ultrafiltration of river water, with the ultimate goal of increasing the filtration performances. Our results indicate intermittent shear helps slowing-down the flux decline but doe...
Article
Because of the current situation of global water shortage, finding strategies that can effectively guarantee water safety and sustainable use has become an urgent problem that needs to be solved at present. Rainwater is a type of clean energy and the method of the treatment and reuse of rainwater has become a pivotal problem that is worthy of consi...
Article
Nutrient limitation is a biofouling control strategy in reverse osmosis (RO) membrane systems. In seawater, the assimilable organic carbon content available for bacterial growth ranges from about 50 to 400 μg C·L⁻¹, while the phosphorus concentration ranges from 3 to 11 μg P·L⁻¹. Several studies monitored biofouling development, limiting either car...
Article
Full-text available
Microbial biofilms in gravity-driven membrane (GDM) filtration systems can efficiently degrade the cyanotoxin microcystin (MC), but it is unclear if this function depends on the presence of MC-producing cyanobacteria in the source water habitat. We assessed the removal of MC from added Microcystis aeruginosa biomass in GDMs fed with water from a la...
Article
Full-text available
Poroelastic fluid-structure interaction models were coupled to experimental data to determine the effects of biofilm spatial distribution of mechanical and hydraulic properties on the biofilm hydraulic resistance and compressibility in membrane filtration processes. Biofilms were cultivated on ultrafiltration membranes for 20 and 30 days under high...
Article
Gravity-driven membrane (GDM) filtration has been investigated for almost 10 years. The technology is characterized not only by relatively lower transmembrane pressures which can be achieved by gravity (extremely low energy consumption), but also by the phenomenon of flux stabilization: A biofilm is allowed to form on the membrane and a stabilizati...
Article
Biofilm formation in membrane systems negatively impacts the filtration system performances. This study evaluated how biofilm compression driven by permeate flow increases the hydraulic resistance and leads to reduction in permeate flux. We analysed the effect of biofilm compression on hydraulic resistance and permeate flux through computational mo...
Article
This study aimed at evaluating the stratification of the hydraulic resistance over the depth of membrane biofilms developed during gravity driven membrane (GDM) ultrafiltration. Biofilms were grown in membrane fouling simulators (MFS) for 25 days under 3 contrasting influent conditions: nutrient enriched, phosphorus limiting, and river water influe...
Article
Increasing transmembrane pressure (TMP) can compress and increase the hydraulic resistance of membrane biofilms. The purpose of the present study is to evaluate how compression of membrane biofilms occurs and how structural rearrangement can affect hydraulic resistance. Biofilms with heterogeneous and homogeneous physical structures were grown in m...
Article
The effect of extracellular polymeric substances (EPS) on the meso-scale physical structure and hydraulic resistance of membrane biofilms during gravity driven membrane (GDM) filtration was investigated. Biofilms were developed on the surface of ultrafiltration membranes during dead-end filtration at ultra-low pressure (70 mbar). Biofilm EPS compos...
Article
Full-text available
It is imperative that nanofiltration membranes are disinfected before they are used for laboratory-scale bacterial adhesion or biofouling experiments, yet currently no suitable disinfection protocol exists. This study aimed to determine if an ethanol treatment at a minimum inhibitory concentration (MIC) could be used to effectively disinfect nanofi...

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Cited By

Projects

Projects (5)
Project
Application of membrane contactors for advanced drinking water treatment PhD student: TBD 2022 PI: Prof. Thomas Wintgens (RWTH-Aachen) Co-PI: Peter Desmond (RWTH-Aachen)
Project
Understanding effects of biofilm enhanced concentration polarisaton on organic solute transmision in dense membranes applied to treated effluent PhD candidate: Zhao Li (RWTH-Aachen University) PI: Peter Desmond (RWTH-Aachen University)
Project
Utility of MABR for wastewater reuse. PhD Candidate: Larissa Grass (RWTH-Aachen) PI: Peter Desmond (RWTH-Aachen)