ORCID Profile
0000-0001-9842-540X
Current Organisation
University of Technology Sydney
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Environmental Engineering | Agriculture, Land and Farm Management | Sustainable Development | Environmental Management And Rehabilitation | Environmental Technologies | Social Policy And Planning | Fertilisers and Agrochemicals (Application etc.)
Environmental education and awareness | Organic Fertilisers | Land and water management | Environmental policy, legislation and standards not elsewhere classified | Expanding Knowledge in Technology |
Publisher: IWA Publishing
Date: 12-2004
Abstract: Electrocoagulation removes pollutant material from water by a combination of coagulant delivered from a sacrificial aluminium anode and hydrogen bubbles evolved at an inert cathode. Rates of clay particle flotation and settling were experimentally determined in a 7 L batch reactor over a range of currents (0.25-2.0 A) and pollutant loadings (0.1-1.7 g/L). Sedimentation and flotation are the dominant removal mechanism at low and high currents, respectively. This shift in separation mode can be explained by analysing the reactor in terms of a published dissolved air flotation model.
Publisher: Elsevier BV
Date: 2008
Publisher: Elsevier BV
Date: 07-2000
Publisher: Inderscience Publishers
Date: 2014
Publisher: Water Environment Federation
Date: 2010
Publisher: Elsevier BV
Date: 04-2007
Publisher: IWA Publishing
Date: 12-2011
DOI: 10.2166/WPT.2010.109
Abstract: In peri-urban areas where infrastructure investments have not yet been made, there is a need to determine the most context-appropriate, fit for purpose and sustainable sanitation solutions. Decision makers must identify the optimal system scale (on the spectrum from centralized to community to cluster scale) and assess the long-term costs and socio-economic/environmental impacts associated with different options. Addressing both cost-effectiveness and sustainability are essential to ensure that institutions and communities are able to continue to bear the costs and management burden of infrastructure operation, maintenance and asset replacement. This paper describes an approach to sanitation planning currently being undertaken as a research study in Can Tho City in southern Vietnam, by the Institute for Sustainable Futures and Can Tho University in collaboration with Can Tho Water Supply and Sewerage Company. The aim of the study is to facilitate selection of the most context-appropriate, fit for purpose, cost effective and sustainable sanitation infrastructure solution. As such, the study compares a range of sanitation alternatives including centralized, decentralized (at household or cluster scale) and resource recovery options. This paper provides an overview of the study and considers aspects of the Can Tho and Vietnamese regulatory, development and institutional context that present drivers and challenges for comparison of options and selection of fit for purpose sanitation systems.
Publisher: Routledge
Date: 10-11-2017
Publisher: Oekom Publishers GmbH
Date: 2018
DOI: 10.14512/GAIA.27.1.3
Publisher: IWA Publishing
Date: 03-2016
DOI: 10.2166/WPT.2016.015
Abstract: Much can be learned from the numerous water recycling schemes currently in operation in Australia, especially with respect to making investment decisions based on uncertain assumptions. This paper illustrates through a number of case studies, that by considering the contextual and project related risks, a range of business related risks become apparent. Shifts in the contextual landscape and the various players’ objectives can occur over the life of a project, often leading to unforeseen risk and uncertainty. Through a thorough consideration of the potential risks presented in this paper, proponents as well as owners and managers might make better recycled water investment decisions, enhancing the benefits and minimizing the costs of water recycling schemes. This paper presents an overview and discussion of seven key factors to consider when planning a recycling scheme.
Publisher: IWA Publishing
Date: 24-10-2013
DOI: 10.2166/WST.2013.473
Abstract: This paper discusses a urine ersion (UD) trial implemented within the institutional setting of the University of Technology Sydney that sought to identify key issues for public UD and reuse systems at scale in the Australian urban context. The trial was novel in its transdisciplinary action research approach, that included consideration of urine erting toilets (UDTs) as socio-technical systems where interactions between users' practices and perceptions and the performance of the technology were explored. While the study explored a broad range of issues that included urine transport, reuse, and regulations, amongst others, the boundary of the work presented in this paper is the practicalities of UD practice within public urban buildings. Urine volume per urinal use, an important metric for sizing tanks for collecting urine from waterless urinal systems in commercial buildings, was also estimated. The project concluded that current UDTs are unsuitable to public/commercial spaces, but waterless urinals have a key role.
Publisher: Carleton University
Date: 31-08-2018
Publisher: Practical Action Publishing
Date: 04-2016
Publisher: Elsevier BV
Date: 04-2005
DOI: 10.1016/J.CHEMOSPHERE.2004.10.023
Abstract: Electrocoagulation is an electrochemical method of treating polluted water whereby sacrificial anodes corrode to release active coagulant precursors (usually aluminium or iron cations) into solution. Accompanying electrolytic reactions evolve gas (usually as hydrogen bubbles) at the cathode. Electrocoagulation has a long history as a water treatment technology having been employed to remove a wide range of pollutants. However electrocoagulation has never become accepted as a 'mainstream' water treatment technology. The lack of a systematic approach to electrocoagulation reactor design/operation and the issue of electrode reliability (particularly passivation of the electrodes over time) have limited its implementation. However recent technical improvements combined with a growing need for small-scale decentralised water treatment facilities have led to a re-evaluation of electrocoagulation. Starting with a review of electrocoagulation reactor design/operation, this article examines and identifies a conceptual framework for electrocoagulation that focuses on the interactions between electrochemistry, coagulation and flotation. In addition detailed experimental data are provided from a batch reactor system removing suspended solids together with a mathematical analysis based on the 'white water' model for the dissolved air flotation process. Current density is identified as the key operational parameter influencing which pollutant removal mechanism dominates. The conclusion is drawn that electrocoagulation has a future as a decentralised water treatment technology. A conceptual framework is presented for future research directed towards a more mechanistic understanding of the process.
Publisher: Oxford University Press (OUP)
Date: 22-08-2022
Abstract: Synthesizing heterogeneous findings from different scientific disciplines, thematic fields, and professional sectors is considered to be a critical component of inter- and transdisciplinary research endeavors. However, little is known about the complex interplay between synthesizing heterogeneous findings, leading creative synthesis, and learning about leading and synthesizing. In the present article, we therefore focus on the key interactions between leading and synthesizing, between synthesizing and learning, and between learning and leading in inter- and transdisciplinary contexts and compile a set of 21 principles that guide the interactions between these components. We use these principles to reflect ex post on the benefits and challenges we encountered in developing a nationwide monitoring program for river restoration in Switzerland and draw lessons learned for future inter- and transdisciplinary research endeavors. We conclude that learning and synthesizing do not happen on their own but need to be designed as intentional and purposeful processes.
Publisher: MDPI AG
Date: 15-02-2017
DOI: 10.3390/SU9020279
Publisher: Elsevier BV
Date: 2015
Publisher: Elsevier BV
Date: 04-2021
Publisher: Springer International Publishing
Date: 2018
Publisher: IWA Publishing
Date: 08-1998
Abstract: This paper considers the hydraulics of a wetland constructed by BP Oil for polishing wastewater from their oil refinery at Bulwer Island, Australia. As this open water surface flow (SF) wetland has a novel design to enhance mixing, a tracer study was performed to analyse the hydraulic flow distribution through the wetland. It is a baseline study, following construction, prior to planting. As introduction to the study, details of the wetland design are provided, together with design justification. The volume of the wetland active zone is estimated as 70% of the total wetland capacity, which compares very favourably with the active volume expected in flat-bottomed ponds. The large amount of dispersion observed along the length of the wetland bed approaches that of a well-mixed system, supporting the claim that this novel bed structure enhances mixing. We expect to at least retain, and possibly improve the degree of mixing by alternating planted shallow zones with unplanted deep zones. The first stage of experimental work at this wetland involves creating a baseline of hydraulic data on which to build a mass balance model of the wetlands performance. Tracer studies will be repeated on the planted, mature wetland to determine the changes to flow, which might occur in the operating system. Together with wetland performance results, these studies will underpin investigations into the pollutant removal mechanisms at BP Oil's Bulwer Island wetland.
Publisher: Elsevier BV
Date: 07-2004
Publisher: Water Environment Federation
Date: 2010
Publisher: Informa UK Limited
Date: 12-2002
Publisher: Elsevier BV
Date: 04-2017
Publisher: IWA Publishing
Date: 03-1997
Abstract: Current design procedures for Subsurface Flow (SSF) Wetlands are based on the simplifying assumptions of plug flow and first order decay of pollutants. These design procedures do yield functional wetlands but result in over-design and inadequate descriptions of the pollutant removal mechanisms which occur within them. Even though these deficiencies are often noted, few authors have attempted to improve modelling of either flow or pollutant removal in such systems. Consequently the Oxley Creek Wetland, a pilot scale SSF wetland designed to enable rigorous monitoring, has recently been constructed in Brisbane, Australia. Tracer studies have been carried out in order to determine the hydraulics of this wetland prior to commissioning it with settled sewage. The tracer studies will continue during the wetland's commissioning and operational phases. These studies will improve our understanding of the hydraulics of newly built SSF wetlands and the changes brought on by operational factors such as biological films and wetland plant root structures. Results to date indicate that the flow through the gravel beds is not uniform and cannot be adequately modelled by a single parameter, plug flow with dispersion, model. We have developed a multiparameter model, incorporating four plug flow reactors, which provides a better approximation of our experimental data. With further development this model will allow improvements to current SSF wetland design procedures and operational strategies, and will underpin investigations into the pollutant removal mechanisms at the Oxley Creek Wetland.
Publisher: IWA Publishing
Date: 12-2002
DOI: 10.2166/WS.2002.0151
Abstract: Electrocoagulation treats water by delivering coagulant from a sacrificial anode (aluminium) in an electrochemical cell. Hydrogen is evolved from the inert cathode. In the batch electrocoagulation reactor numerous interactions occur with settling and flotation identified as the dominant removal paths. Current determines both coagulant dosage and bubble production rate. The bubbles influence the mixing, and hence mass diffusion within the reactor. Rate of flotation and settling were experimentally determined for currents 0.25-2.0 A and pollutant loading 0.1-1.7 g/L. The performance of the electrocoagulation reactor was quantified by analysis of experimental results. First-order ordinary differential equations were developed to describe the pollutant's settling and flotation behaviour. Kinetic rate constants were calculated considering this pair of irreversible reactions. At low current (0.25A), sedimentation dominates with slow release of coagulant and gentle agitation provided by low bubble production. Removal is slow and hence the low rate constants calculated were appropriate. At high currents (1.0 and 2.0 A) faster removal occurs due to greater bubble density. This resulted in greater mass floated to the surface and higher rate constants were observed. Thus the developed rate equations successfully quantified the reactor's performance over a variety of conditions.
Publisher: Wiley
Date: 26-05-2004
Publisher: Springer International Publishing
Date: 2018
Publisher: Routledge
Date: 12-03-2012
Publisher: IWA Publishing
Date: 1999
Publisher: IWA Publishing
Date: 15-02-2016
Abstract: How we think and talk about sanitation services has changed. The very notion of a sanitation service has been transformed from one focused on technology to one focused on the sustainability of the wider sanitation system. This paper explores the transformation from technology to system by drawing from a review of more than 200 pieces of literature published between 1970 and 2015. Seven prevalent perspectives on sanitation service provision are introduced: sanitation services as a basic human need increasing service coverage through appropriate technology the emergence of community-participation and community-management an interest in private-sector participation the sanitation crisis being viewed as a crisis of governance sanitation considered inherently political and the current focus on sustainable sanitation systems. These seven perspectives form a useful conceptual frame, which may guide the thinking of sanitation practitioners, policy-makers and academics as they begin to consider how to meet the water and sanitation Sustainable Development Goal by 2030. In this paper, four ex les of how the conceptual frame might be used to support thinking are provided.
Publisher: Informa UK Limited
Date: 28-05-2018
Publisher: Inderscience Publishers
Date: 2014
Publisher: Elsevier BV
Date: 04-2001
DOI: 10.1016/S0043-1354(00)00373-0
Abstract: A new, mechanistic approach for design and analysis of subsurface flow (SSF) constructed wetlands is presented. The model is based on the assumption that the biological processes in wetlands, like other biological systems, exhibit Monod kinetics. A Monod approach fits well with observed wetland performance. It predicts first-order behaviour at low concentrations, that is, pollutant removal rates which increase with increasing pollutant concentration and zero-order or saturated behaviour at high pollutant concentrations, that is, a maximum pollutant removal rate. A kinetic analysis of subsurface flow constructed wetlands exhibiting Monod kinetics reveals that loading rate, as well as the zero-order degradation rate constant, are essential parameters for efficient wetlands design for the removal of organic carbon. In particular, Monod kinetics enables the identification of an absolute maximum removal rate which is necessary to prevent undersizing in design. This is significant because it represents a theoretical upper bound on loading rate for wetlands design. The analysis is applied to wetlands data collected in North America by the US EPA in order to extract design criteria for BOD removal. It reveals that maximum loadings for SSF wetlands are at least 80 kg ha-1 d-1 for BOD. In addition, a new dimensionless performance efficiency parameter, omega, is presented as a more effective means of comparing wetland performance.
Publisher: American Chemical Society (ACS)
Date: 04-2020
Publisher: Elsevier BV
Date: 12-2002
Publisher: IWA Publishing
Date: 12-2012
DOI: 10.2166/WPT.2012.092
Abstract: The City of Sydney is working to realise its vision to be a GREEN, GLOBAL and CONNECTED city, a vision articulated in their strategy Sustainable Sydney 2030 by undertaking a bold and ambitious project. The project will showcase how inner suburban areas can be retrofitted with innovative water systems to achieve integrated, resilient and sustainable water cycle outcomes. The baselining process is a major step in the development of a suite of plans that constitute the Decentralised Water Master Plan, including: a Water Efficiency Plan, a Stormwater Infrastructure Improvement Plan, a Water Sensitive Urban Design Plan and a Decentralised Non-Potable Water Network Plan. Significant community consultation is being undertaken to ensure the community and stakeholders have opportunities to input into the project. The final plan will not be a fixed document but will be an evolving document to take into account changing contexts and additional data as it becomes available.
Publisher: Informa UK Limited
Date: 04-2006
Publisher: Informa UK Limited
Date: 03-1998
Publisher: Michigan State University
Date: 2019
Publisher: MDPI AG
Date: 23-01-2018
Publisher: Elsevier BV
Date: 10-2002
DOI: 10.1016/J.JHAZMAT.2007.04.018
Abstract: This paper provides a quantitative comparison of electrocoagulation and chemical coagulation approaches based on boron removal. Electrocoagulation process delivers the coagulant in situ as the sacrificial anode corrodes, due to a fixed current density, while the simultaneous evolution of hydrogen at the cathode allows for pollutant removal by flotation. By comparison, conventional chemical coagulation typically adds a salt of the coagulant, with settling providing the primary pollutant removal path. Chemical coagulation was carried out via jar tests using aluminum chloride. Comparison was done with the same amount of coagulant between electrocoagulation and chemical coagulation processes. Boron removal obtained was higher with electrocoagulation process. In addition, it was seen that chemical coagulation has any effect for boron removal from boron-containing solution. At optimum conditions (e.g. pH 8.0 and aluminum dose of 7.45 g/L), boron removal efficiencies for electrocoagulation and chemical coagulation were 94.0% and 24.0%, respectively.
Publisher: Informa UK Limited
Date: 08-2013
Publisher: Informa UK Limited
Date: 11-2009
Publisher: Wiley
Date: 02-12-2003
DOI: 10.1002/HYP.1162
Publisher: Springer Science and Business Media LLC
Date: 03-1991
DOI: 10.1007/BF00556292
Abstract: The potential of dark field electron microscopy for examining details of unstained unshadowed macromolecules has been studied. Images produced by scattered electrons show sufficient contrast and resolution to reveal the helical nature of short sections of DNA or the cleft containing the active site in ribonuclease. Spreads of transfer RNA were observed to contain many trifoliate structures.
Publisher: IWA Publishing
Date: 09-2007
DOI: 10.2166/WST.2007.569
Abstract: Decentralised systems have the potential to provide a viable option for long term sustainable management of household wastewater. Yet, at present, such systems hold an uncertain status and are frequently omitted from consideration. Their potential can only be realised with improved approaches to their management, and improved methods to decision-making in planning of wastewater systems. The aim of this paper is to demonstrate the value of a novel framework to guide the planning of decentralised systems so that asset management and risk management are explicitly considered. The framework was developed through a detailed synthesis of literature and practice in the area of asset management of centralised water and wastewater systems, and risk management in the context of decentralised systems. Key aspects of the framework are attention to socio-economic risks as well as engineering, public health and ecological risks, the central place of communication with multiple stakeholders and establishing a shared asset information system. A case study is used to demonstrate how the framework can guide a different approach and lead to different, more sustainable outcomes, by explicitly considering the needs and perspectives of homeowners, water authorities, relevant government agencies and society as a whole.
Publisher: Informa UK Limited
Date: 09-2000
Publisher: IWA Publishing
Date: 07-09-2013
DOI: 10.2166/WP.2013.178
Abstract: This paper investigates the process of organisational learning in decision making and planning for sustainability in the water sector. A Melbourne water utility (Yarra Valley Water) trialling sustainable systems of service provision utilised multi-stakeholder experiences to facilitate learning within the organisation. Diverse perspectives of the trial were sought through 50 interviews with staff managing/operating/maintaining the system and household residents using the system. Outcomes from interviews were shared with the project team in a social learning workshop and translated into recommendations for trialling innovation within the water utility and more broadly within the Australian water sector. The facilitated process of organisational learning highlighted the importance of cross-departmental communication and co-operation, reflective processes of management and the value of a ‘transdisciplinary’ approach to planning and implementing novel systems of service provision. The outcome was the development of new procedures to support integrated knowledge development in trialling innovation within Yarra Valley Water.
Publisher: Elsevier BV
Date: 2022
Publisher: Informa UK Limited
Date: 10-1996
Publisher: IWA Publishing
Date: 1997
Publisher: Springer Science and Business Media LLC
Date: 03-2008
Publisher: IWA Publishing
Date: 2000
Abstract: Currently the accepted practice for swine wastewater disposal is lagoon stabilisation followed by land application. This disposal method can exacerbate odour emissions and contribute to soil contamination and eutrophication of waterways. Intensification of the pig industry has increased the impact of in idual piggeries this combined with tightening legislation is causing the pig industry in Australia to look at alternative treatment methods. A pilot scale sequencing batch reactor (SBR) was built to treat piggery wastewater. It achieved NH4+ and odour reductions of greater than 99% as well as 79% removal of COD and a 49% reduction of PO43−on a mass balance basis. The reactor experienced problems with foaming for the first 2 months of operation, which was controlled with vegetable oil until the foaming stopped. Struvite formation also occurred within the reactor and influent pipes but it was calculated that sufficient nutrients were removed to prevent precipitation down stream of the SBR.
Start Date: 07-2022
End Date: 07-2026
Amount: $2,062,428.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2003
End Date: 12-2003
Amount: $10,000.00
Funder: Australian Research Council
View Funded Activity