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Liwen Xiao
Assistant Professor, Civil Struct & Env. Eng.

Biography

Dr. Liwen Xiao received his PhD degree at NUI Galway and worked as a lecturer there before joining the Department of Civil, Structural and Environmental Engineering at TCD as Assistant Professor in 2013. Since joining TCD, Dr Xiao has continued his research work in the fields of assessment and mitigation of impacts of human activities on water quality and development of water and wastewater treatment technologies. He currently has 4 PhD students in his research group and is involved in a number of research projects funded by national and international funding agencies. Dr Xiao is a college tutor and a member of Research Committee. He is also a deputy director of the research centre TrinityHaus.

Publications and Further Research Outputs

Peer-Reviewed Publications

Geotechnical aspects of peatland restoration and management, Environmental Geotechnics, Institution of Civil Engineering, [eds.], 2018 Editorial Board, 2018

Morgan D., Xiao, L., McNabola, A., Evaluation of Combined Sewer Overflow assessment methods: case study of Cork City, Ireland, Water and Environment Journal, 2017, p1-7 Journal Article, 2017 DOI

Molecular Diversity of Oleaginous Fungi in Irish Soil and Their Potential for Biodiesel Production in, Molecular Markers in Mycology, 2017, [IK Muniraj, S Uthandi, L Xiao, Z Hu, X Zhan] Book Chapter, 2017

O'Driscoll C, Ramwell C, Harhen B, Morrison L, Clauson-Kaas F, Hansen HC, Campbell G, Sheahan J, Misstear B, Xiao L, Ptaquiloside in Irish Bracken Ferns and Receiving Waters, with Implications for Land Managers., Molecules (Basel, Switzerland), 21, (5), 2016 Journal Article, 2016 DOI

Annu Kaila, Zaki Asam, Markku Koskinen, Risto Uusitalo, Aino Smolander, Oili Kiikkilä, Sakari Sarkkola, Connie O'Driscoll, Veikko Kitunen, Hannu Fritze, Hannu Nousiainen, Arja Tervahauta, Liwen Xiao, Mika Nieminen, Impact of Re-wetting of Forestry-Drained Peatlands on Water Quality-a Laboratory Approach Assessing the Release of P, N, Fe, and Dissolved Organic Carbon, Water, Air, & Soil Pollution , 227, (8), 2016, p227 - 292 Journal Article, 2016 URL

Kaila A., Kaila A., Laurén A., Sarkkola S., Koivusalo H., Ukonmaanaho L., O"Driscoll C., Xiao L., Asam Z., Nieminen M., Effect of clear-felling and harvest residue removal on nitrogen and phosphorus export from drained norway spruce mires in southern finland, Boreal Environment Research, 20, (6), 2015, p693-706 Journal Article, 2015 TARA - Full Text

Muniraj Iniya Kumar, Uthandi Siva Kumar, Hu Zhenhu, Xiao Liwen, Zhan Xinmin , Microbial lipid production from renewable and waste materials for second-generation biodiesel feedstock, Environmental Technology Reviews, 4, (1), 2015, p1 - 16 Journal Article, 2015

Muniraj I., Xiao L., Liu H., Zhan X., Utilisation of potato processing wastewater for microbial lipids and "-linolenic acid production by oleaginous fungi, Journal of the Science of Food and Agriculture, 95, (15), 2015, p3084-3090 Journal Article, 2015 DOI

O'Driscoll C, O'Connor M, Asam ZU, de Eyto E, Brown LE, Xiao L, Forest clearfelling effects on dissolved oxygen and metabolism in peatland streams., Journal of environmental management, 166, 2015, p250-259 Journal Article, 2015 DOI

C. O'Driscoll, J. Sheahan, F. Pilla, B. Misstear, X. Zhan, L. Xiao, Identification of high risk catchments for public and private water supplies in relation to NOM across Ireland, NOM6, the 6th International Water Association (IWA) Specialist Conference on Natural Organic Matter in Water, Malmo, Sweden, 7-10 September, 2015 Poster, 2015

Zaki-ul-Zaman Asama, Mika Nieminen, Connie O'Driscoll, Mark O'Connor, Sakari Sarkkola, Annu Kaila, Afshan Sana, Michael Rodgers, Xinmin Zhan, Liwen Xiao*, Export of phosphorus and nitrogen from lodgepole pine (Pinus contorta) brash windrows on harvested blanket peat forests, Ecological Engineering, 64, 2014, p161 - 170 Journal Article, 2014

Connie O'Driscoll, Mark O'Connor, Zaki-ul-Zaman Asam, Elvira de Eyto, Russell Poole, Michael Rodgers, Xinmin Zhan and Liwen Xiao*, Whole-tree harvesting and grass seeding as potential mitigation methods for phosphorus export control in forest harvested peatland catchments., Forest Ecology and Management, 319, 2014, p176 - 185 Journal Article, 2014

Kaila A., Kaila A., Sarkkola S., Laurén A., Ukonmaanaho L., Koivusalo H., Xiao L., O'Driscoll C., Asam Z., Tervahauta A., Nieminen M., Phosphorus export from drained Scots pine mires after clear-felling and bioenergy harvesting, Forest Ecology and Management, 325, 2014, p99-107 Journal Article, 2014 DOI

Zaki-ul-Zaman Asam, Mika Nieminen, Annu Kaila, Raija Laiho, Sakari Sarkkola, Mark O'Connor, Afshan Sana, Connie O'Driscoll, Michael Rodgers, Xinmin Zhan, L.W. Xiao, Nutrient and heavy metal dynamics in decaying harvest residue needles on drained blanket peat forests, European Journal of Forest Research, 133, 2014, p969 - 982 Journal Article, 2014

Connie O'Driscoll, Mark O'Connor, Zaki-ul-Zaman Asam,Elvira de Eyto, Michael Rodgers, Liwen Xiao∗, Creation and functioning of a buffer zone in a blanket peatforested catchment, Ecological Engineering, 62, 2014 Journal Article, 2014

Henry, L.W. Xiao and X. Zhan, Effect of aeration rate on domestic wastewater treatment using an intermittently aerated sequencing batch reactor technology, Environmental Engineering and Management Journal, 2013 Journal Article, 2013

Connie O'Driscoll, Elvira de Eyto, Michael Rodgers, Mark O'Connor, Zaki-ul-Zaman Asam, Martyn Kelly, Liwen Xiao, Influence of natural variation for biomonitoring in upland peat rivers, Hydrobiologia, 2013 Journal Article, 2013

Connie O'Driscoll, Elvira de Eyto, Mark O'Connor, Zaki-ul-Zaman Asam, Michael Rodgers, Liwen Xiao*, Biotic response to forest harvesting in acidic blanket peat fed streams: A case study from Ireland, Forest Ecology and Management, 2013 Journal Article, 2013

Iniya Kumar Muniraj, Liwen Xiao, Zhenhu Hu, Xinmin Zhan, Jianghong Shic, Microbial Lipid Production from Potato Processing Wastewater Using Oleaginous Filamentous Fungi Aspergillus oryzae, Water Research, 2013 Journal Article, 2013

Ruihua Li, Cathal Kelly, Richard Keegan, Liwen Xiao, Liam Morrison, Xinmin Zhan, Phosphorus removal from wastewater using natural pyrrhotite, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 427, 2013 Journal Article, 2013

O'Driscoll C., Rodgers M., O'Connor M., Asam Z. and Xiao L.W, Assessment of the impact of phased felling the ecological quality of first order streams and subsequent salmonid river, In: the 14th International Peat Congress, in Stockholm, Sweden 3-8 June 2012., 2012 Conference Paper, 2012

Asam Zaki-ul-Zaman Asam, Mika Nieminen, Annu Kaila, Afshan Sana, Sakari Sarkkola Connie O'Driscoll Mark O'Connor, Michael Rodgers , Xiao L.W, Assessment of nutrient release from harvest residue and the roles of buffer areas and seeded vegetation in nutrient retention in harvested blanket peat foreste, In: the 14th International Peat Congress, in Stockholm, Sweden 3-8 June 2012, 2012 Conference Paper, 2012

Asam, Z., Kaila, A., Nieminen, M., Sarkkola, S., O'Driscoll, C., O'Connor, M., Sana, A., Rodgers, M., Xiao, L, Assessment of phosphorus retention efficiency of blanket peat buffer areas using a laboratory flume approach, Ecological Engineering, 49, 2012 Journal Article, 2012

K. Li, Z.L. Tong, L.W. Xiao, X. Zhan and Z.H Hu, Adsorption of Roxars one from aqueous solution by anaerobic granular sludge, In: International Symposium "Recent Advances in Water Resources management & Pollution Control with Special Focus on China", Galway, Ireland. 10-11 May 2012, 2012 Conference Paper, 2012

Kaila, A., Asam, Z., Sarkkola, S., Xiao, L., Finér, L., Laurén, A., Vasander, H., Nieminen, M, Decomposition of Picea abies (L.) Karst. and Pinus sylvestris L. cutting residue needles on peatlands drained for forestry - implications for nutrient and heavy metal dynamics, Forest Ecology and Management, 277, 2012 Journal Article, 2012

O'Driscoll, C., Rodgers, M., O'Connor, M., Asam, Z., De Eyto, E., Xiao, L, Diatom assemblages and their associated environmental factors in upland peat forest rivers, Ecological Indicators, 2012 Journal Article, 2012

Xiao L.W*, Robinson M., Rodgers M., O'Connor M., M., O'Driscoll, C., Asam, Z.-U-.Z, Impact of blanket peat forest harvesting on stream flow regime, In: the 14th International Peat Congress, in Stockholm, Sweden 3-8 June 2012, 2012 Conference Paper, 2012

Kaila A., Zaki-ul-Zaman Asam, Sakari Sarkkola, Xiao L.W, Ari Laurén, Mika Nieminen, The effect of water table rising on nutrient and dissolved organic carbon (DOC) release from restorated peatland forests, In: the 14th International Peat Congress, in Stockholm, Sweden 3-8 June 2012, 2012 Conference Paper, 2012

Rodgers M., O'Connor M., Robinson M., Muller M., Poole R., and Xiao L.W, Suspended solid yield from forest harvesting on upland blanket peat, Hydrol. Process , 25, (2), 2011 Journal Article, 2011

O'Driscoll C., Rodgers M., O'Connor M., Asam Z., de Eyto E., Poole R., and Xiao L.W, A Potential Solution to Mitigate Phosphorus Release Following Clearfelling in Peatland Forest Catchments, Water Air Soil Pollution, 221, 2011 Journal Article, 2011

Xiao L.W*, Robinson M., Rodgers M., O'Connor M., M., O'Driscoll, C., Asam, Z.-U-.Z , Impact of blanket peat forest harvesting on stream flow regime - A case study in the Burrishoole catchment, Co. Mayo., In: Proceedings of the National Hydrology Conference, Radisson Hotel, Athlone, Ireland 15th November 2011, 2011 Conference Paper, 2011

Assessment and mitigation of nutrients losses from forest harvesting on upland blanket peat - a case study in the Burrishoole Catchment in, Forestry / Book 1, 2011, [1. Xiao L.W*, Rodgers M., O'Connor M., O'Driscoll C. and Asam Z] Book Chapter, 2011

Rodgers M., O'Connor M., Healy M., O'Driscoll C., Asama Z., Nieminen M., Poole R., Muller M. and Xiao L.W.*, Phosphorus release from forest harvesting on an upland blanket peat catchment, Forest Ecology and Management, 260, (12), 2010 Journal Article, 2010

O'Driscoll C., Rodgers M., O'Connor M., Asam Z. and Xiao L.W, Assessment of forest clearfelling impacts on salmonid waters in the west of Ireland, In: The British and Irish Diatom Meeting. Glencree Reconciliation Centre, Co. Wicklow, Ireland. 22-24th October 2010, 2010 Conference Paper, 2010

Xiao L.W*, and Michael Rodgers, Comparison of nitrogen removals from synthetic dairy wastewater using two horizontal-flow biofilm reactor systems - one with a denitrifying suspended growth reactor and the other with a step feed, IWA 8th Specialised Conference on Small Water and Wastewater Systems and 2nd Specialized Conference on Decentralised Water and Wastewater International Network, KCT, Coimbatore, India, 2008 Conference Paper, 2008

Xiao L.W.*, Rodgers M. and Mulqueen J. , Organic carbon and nitrogen removal from a strong wastewater using a denitrifying suspended growth reactor and a horizontal-flow biofilm reactor, Bioresource Technology, 98, 2007 Journal Article, 2007

Rodgers M., Xiao L.W.* and Muqueen J. , Horizontal-flow biofilm system with step feed for nitrogen removal, Journal of Environmental Engineering (ASCE), 133, (6), 2007 Journal Article, 2007

Rodgers M., Xiao L.W.* and Mulqueen J. , Synthetic Dairy Wastewater Treatment Using a New Horizontal-Flow Biofilm Reactor, Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering, 41, (5), 2006 Journal Article, 2006

Rodgers M., Lambe A. and Xiao L.W., Carbon and nitrogen removal using a novel horizontal flow biofilm system, Process Biochemistry, 41 , (11), 2006 Journal Article, 2006

Non-Peer-Reviewed Publications

Connie O'Driscoll, Liwen Xiao, Xinmin Zhan, Bruce Misstear, Francesco Pilla, Carmel Ramwell, Assessment of natural organic matter (NOM) and ptaquiloside in Irish waters, Dublin, 2017 Report, 2017

Liam Henry , Comparison of intermittently aerated sequencing batch reactors (IASBRs) and conventional sequencing batch reactors (cSBRs) in wastewater treatment , NUI Galway, 2014 Thesis, 2014

Xiao L.W, Assessment of natural organic matter (NOM) and ptaquiloside in Irish waters, China-Ireland Symposium on Environmental Biotechnology , Shenzhen, China, May 17, 2014 Invited Talk, 2014

Sarah Noonan , An Environmental Analysis of Irish Peatlands from a Wind Energy and Carbon Balance Perspective, TCD, 2013 Thesis, 2013

Asam Z, Investigation of nutrient sources and their transportation from soils to water, NUI Galway, 2012 Thesis, 2012

Kumar I. , Biodiesel production from agro-industrial waste using oleaginous fungi , NUI Galway, 2012 Thesis, 2012

O'Driscoll C. , Assessment and mitigation of soil and nutrients losses from acid-sensitive catchments to salmonid receiving waters , NUI Galway, 2012 Thesis, 2012

Michael Rodgers, Xiao L.W, Markus Müller, Mark O'Connor, Elvira de Eyto, Russell Poole, Mark Robinson and Mark Healy, Quantification of Erosion and Phosphorus Release from a Peat Soil Forest Catchment, Dublin, 2008 Report, 2008

Xiao L.W, High strength agricultural wastewater treatment using novel horizontal-flow biofilm reactors, NUI Galway, 2007 Thesis, 2007

Rodgers M., Mulqueen J., Lambe A., Xiao L.W. and Clifford, E, 'A Biofilm Reactor', NUIG, 2004 Patent, 2004 URL

Research Expertise

Description

I have devoted myself to research and practice in the areas of Assessment and mitigation of impact of land use on water quality and ecology and development of water and wastewater treatment technologies in the last 10 years.

Projects

  • Title
    • Improvement and application of microbial fuel cells
  • Funding Agency
    • China Scholarship Council / School of Engineering
  • Date From
    • 2015
  • Date To
    • 2019
  • Title
    • The cause of diatom algal bloom in lakes
  • Funding Agency
    • China Scholarship Council / School of Engineering
  • Date From
    • 2016
  • Date To
    • 2019
  • Title
    • Investigation into the causes, impacts and measures to deal with algal blooms in Vartry Reservoirs (project PI)
  • Funding Agency
    • EPA
  • Date From
    • 2015
  • Date To
    • 2018
  • Title
    • Technologies for monitoring, detecting and treating overflows from urban wastewater networks (project PI)
  • Funding Agency
    • EPA
  • Date From
    • 2015
  • Date To
    • 2016
  • Title
    • A framework for the restoration of degraded peatlands (WP leader)
  • Funding Agency
    • EPA
  • Date From
    • 2015
  • Date To
    • 2018
  • Title
    • Using nanotechnology to treat wastewater from offshore oil & gas industry - a feasibility study
  • Summary
    • The main objective of the project is to investigate the feasibility of employing nanomaterial to remove dissolved hydrocarbons and heavy metals from offshore oil/gas industrial wastewater in Ireland.(Project PI)
  • Funding Agency
    • The Irish Petroleum Infrastructure Programme (PIP)
  • Date From
    • 2014
  • Date To
    • 2015
  • Title
    • High sensitivity optical chemical sensor for water quality monitoring
  • Summary
    • This project seeks to investigate the feasibility of employing a low cost, fast response, high sensitivity fibre based structure for chemical sensor, particularly for the application of water quality monitoring which is essential for water resources management and water quality control. (Project collaborator, DIT/TCD)
  • Funding Agency
    • SFI
  • Date From
    • 2014
  • Date To
    • 2015
  • Title
    • Assessment of natural organic matter (NOM) and ptaquiloside in Irish waters
  • Summary
    • The aim of the proposed study is to quantify more accurately the risk of NOM including naturally-occurring (organic) toxins such as ptaquiloside from bracken to surface water and groundwater supplies in Ireland. This project will provide comprehensive knowledge on NOM and ptaquiloside in Irish waters. (Project PI, TCD/NUIG)
  • Funding Agency
    • EPA
  • Date From
    • 03/2014
  • Date To
    • 08/2016
  • Title
    • Biomass and Renewable Energy from Short Rotation Forestry
  • Summary
    • This research project aims to explore the potential of short rotation forestry (SRF) to contribute to biomass production and renewable energy targets in Ireland. (PI of the TCD project team, UCD/Teagasc/WIT/TCD/UL/Coillte)
  • Funding Agency
    • Department of Agriculture, Food and the Marine
  • Date From
    • 2013
  • Date To
    • 2017
  • Title
    • Development of a Water Use and Waste Management Framework for the Dairy Processing Industry
  • Summary
    • This project aims to identify effective and sustainable technologies, which will treat dairy waste and reduce water usage in the dairy processing sector. TCD research team will investigate the treatment of dairy wastewater by using nanotechnologies.(PI of the TCD project team, NUIG/UCC/TCD/AIT/Teagasc)
  • Funding Agency
    • Department of Agriculture, Food and the Marine
  • Date From
    • 12/2013
  • Date To
    • 11/2017
  • Title
    • FORSITE Critical Biomass Removal on Irish Forest Soils
  • Summary
    • The recent European directive on the promotion of energy from renewable sources sets a mandatory target of 20% of energy from renewable sources by 2020. This need is driving bioenergy use from forests. However, concerns exist about the effects of brash removal on the sustainability of forest ecosystems. In this project, a new concept is introduced, of critical biomass removal, which is the quantitative amount of long-term biomass removal below which impacts to nutrient supply will not occur according to current knowledge. (PI of the TCD project team, UCD/TCD/UL/Teagasc/Coillte)
  • Funding Agency
    • Department of Agriculture, Food and the Marine
  • Date From
    • 2013
  • Date To
    • 2016
  • Title
    • Assessment and mitigation of greenhouse gas emissions, carbon and nutrient losses from wind farm construction on peatland
  • Summary
    • The 2009 Renewable Energy Directive (2009/28/EC) set the target of 20% for all energy coming from renewable sources in the EU by 2020. In order to meet this target, the Irish government has proposed that 40% of the gross electricity consumption will come from renewable sources by 2020, mainly from wind energy, which is abundant throughout Ireland (IWEA, 2012). The Irish wind energy industry has developed very significantly in the last two decades and its installed capacity has increased from 16.5 MW in 1994 to 1,500 MW in 2011 (IWEA, 2012). An additional 3,100 MW from renewable resources will be required to meet the 2020 target (SEAI, 2010). Due to their suitable locations and high wind energy characteristics, upland peat sites will be chosen for wind farm construction to satisfy the additional requirements.the objectives of this project are to: (1) establish a database on climate change parameters for existing wind farms constructed on peatland in the west of Ireland; (2) examine the performance of the best management practices implemented for established peatland wind farms on GHG emission, carbon and nutrient release controls based on the data set established; (3) verify carbon loss models for use in Irish conditions based on the data set established; (Project PI)
  • Funding Agency
    • SEAI
  • Date From
    • 2012
  • Title
    • FLEXISAM: AN AUTOMATED FLUID SAMPLER (INCORPORATING A NOVEL MODULAR DESIGN AND STACKABLE STORAGE BOTTLE UNIT WITH SAMPLE FIXING CAPABILITIES FOR SUBSEQUENT LABORATORY ANALYSIS)
  • Summary
    • Commercial feasibility study of a novel automated fluid sampler (Project PI)
  • Funding Agency
    • Enterprise Ireland
  • Date From
    • 2012
  • Title
    • Assessment and mitigation of soil and nutrient losses from acid-sensitive forest catchments
  • Summary
    • This study's objective is to develop sustainability guidelines for the clearfell-sizing and harvesting management of forest coupes within acid-sensitive catchments so that losses from forestry activities are reduced sufficiently by dilution or buffer zones in order not to adversely affect the biota in productive salmonid receiving waters. The guidelines will be based on: comprehensive physical, chemical and biological experiments in the field and laboratory; and syntheses of fluxes of water, soil and nutrient inputs, uptakes/releases and outputs. The field study will be carried out in three acid-sensitive well-defined microcatchments in the Coillte Forest, Burrishoole, Co. Mayo. (Project Coordinator)
  • Funding Agency
    • The Department of Agriculture, Food and the Marine
  • Date From
    • 12/2007
  • Date To
    • 02/2013

Keywords

Agri Environment; Climate Change Impacts on the Environment; ENVIRONMENTAL ENGINEERING; ENVIRONMENTAL IMPACT; ENVIRONMENTAL MANAGEMENT; FIBRE OPTICAL SENSORS; Fresh water pollution; Freshwater ecology; Ground, surface water hydrology; WASTEWATER TREATMENT; Water Quality; Water Resources, Environmental Impacts; WATER-TREATMENT; Wind Energy, General

Recognition

Awards and Honours

Best Presentation Award 2008

Memberships

MIEI, Chartered Engineer, Engineers Ireland