Ecological renovation of constructed wetlands: changing state from algae to macrophyte dominated systems. Mars Confectionary's constructed wastewater treatment wetlands no longer purify its waste waters. Over-burdening has tipped the balance from a plant dominated, clear water system to an algae dominated, turbid system. This project will aid restoration of the Mars wetlands by (1) improving our understanding of alage-macrophyte dynamics in shallow water basins; (2) producing a series of soft en ....Ecological renovation of constructed wetlands: changing state from algae to macrophyte dominated systems. Mars Confectionary's constructed wastewater treatment wetlands no longer purify its waste waters. Over-burdening has tipped the balance from a plant dominated, clear water system to an algae dominated, turbid system. This project will aid restoration of the Mars wetlands by (1) improving our understanding of alage-macrophyte dynamics in shallow water basins; (2) producing a series of soft engineering, ecologically based techniques for the management / rehabilitation of natural and constructed shallow water bodies which receive high nutrient loads; (3) improve decision support tools for the renovation and sustainable management of the Mars Confectionary, and similar food processing industry constructed wetlands.Read moreRead less
The use of chiral pharmaceutical compounds to characterise sewage treatment processes and sewage contamination of surface waters. Contamination by poorly treated and untreated sewage can severely degrade the quality of Australian surface waters. However, the behaviour of organic chemicals during conventional sewage treatment processes remains poorly understood. Furthermore, raw sewage pollution is generally not distinguishable from properly discharged treated sewage effluent by current analytica ....The use of chiral pharmaceutical compounds to characterise sewage treatment processes and sewage contamination of surface waters. Contamination by poorly treated and untreated sewage can severely degrade the quality of Australian surface waters. However, the behaviour of organic chemicals during conventional sewage treatment processes remains poorly understood. Furthermore, raw sewage pollution is generally not distinguishable from properly discharged treated sewage effluent by current analytical methods. The proposed research will provide a chemical marker for characterising treatment processes and identifying untreated sewage pollution. This will help to identify sources of such pollution so that they may be corrected. A principal outcome of the research will be the improved ability to protect Australia's valuable surface waters from sewage pollution.Read moreRead less
Groundwater dynamics at the ocean-aquifer interface: Implications for modelling of regional flow in Pioneer Valley Aquifers. The Pioneer Valley Water Resources Plan, part of the Council of Australian Government's Water Reform Process, includes the development of regional groundwater flow and saltwater intrusion models for assisting in the allocation and management of the groundwater resources. The ocean forms the largest active boundary of the Pioneer groundwater system, where complex, dynamic h ....Groundwater dynamics at the ocean-aquifer interface: Implications for modelling of regional flow in Pioneer Valley Aquifers. The Pioneer Valley Water Resources Plan, part of the Council of Australian Government's Water Reform Process, includes the development of regional groundwater flow and saltwater intrusion models for assisting in the allocation and management of the groundwater resources. The ocean forms the largest active boundary of the Pioneer groundwater system, where complex, dynamic hydraulic conditions exist due to oceanic oscillations (tides and waves) and density effects. This project aims to investigate and quantify the effects of the dynamic seaward boundary condition on regional groundwater flow in Pioneer Valley aquifers. The research outcomes will also have important implications for other coastal aquifers.Read moreRead less
A Basic Study of Mixing and Dispersion in Riverine and Estuarine Systems in South-East Queensland. Dispersion of matter in natural river systems is of considerable importance, particularly in relation to the transport of nutrients, sediment and toxicants into ecosystems as a result of stormwater runoff and wastewater discharges. The project aims to improve our basic understanding of mixing and dispersion processes in tropical and subtropical rivers and estuaries, and to develop improved predicti ....A Basic Study of Mixing and Dispersion in Riverine and Estuarine Systems in South-East Queensland. Dispersion of matter in natural river systems is of considerable importance, particularly in relation to the transport of nutrients, sediment and toxicants into ecosystems as a result of stormwater runoff and wastewater discharges. The project aims to improve our basic understanding of mixing and dispersion processes in tropical and subtropical rivers and estuaries, and to develop improved predictive models to assist with the management of natural ecosystems. This will be achieved through a Ph.D. research project integrating basic water engineering and environmental sciences.Read moreRead less
Electrochemical treatment of problematic water recycle waste streams. Supply of potable water to Australia's major urban areas is a major challenge to growth and quality of life. Indirect potable reuse via membranes can address this issue, as it offers an inexpensive and sustainable water supply, as well as leveraging new water sources. However, the potential impact of the generated reject concentrates on aquatic and human health is potentially of large concern. Our project helps address this, ....Electrochemical treatment of problematic water recycle waste streams. Supply of potable water to Australia's major urban areas is a major challenge to growth and quality of life. Indirect potable reuse via membranes can address this issue, as it offers an inexpensive and sustainable water supply, as well as leveraging new water sources. However, the potential impact of the generated reject concentrates on aquatic and human health is potentially of large concern. Our project helps address this, by making reject treatment economically and environmentally much more sustainable, and thereby future-proofing the technology. In addition, it develops technology that can be used worldwide to treat other recalcitrant streams (e.g., hospital, tannery, pulp and paper), is highly scalable, and is low in operating cost.Read moreRead less
Enhancing the productivity of wastewater desalination. Climate change is causing reduced rainfall over much of populated Australia. New technology to enable membrane desalination of wastewater treatment effluent will be developed to provide secure reliable water supplies for Australian (and international) urban and regional communities. Application of the technology to Western Treatment Plant at Werribee will provide up to 10 gigalitres/year of recycled water to the local agricultural, business ....Enhancing the productivity of wastewater desalination. Climate change is causing reduced rainfall over much of populated Australia. New technology to enable membrane desalination of wastewater treatment effluent will be developed to provide secure reliable water supplies for Australian (and international) urban and regional communities. Application of the technology to Western Treatment Plant at Werribee will provide up to 10 gigalitres/year of recycled water to the local agricultural, business and tourism precincts. The economy, community and environment will benefit due to reduced use of potable, river and ground water. Wide application of this technology to wastewater and brackish water will lead to similar benefits and an environmentally sustainable Australia.
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Riparian rehabilitation and ecohydraulics: interactions between flow, sediment, vegetation and bank erosion in longstem tubestock rehabilitation works. Riparian lands are important for maintaining viable ecosystems, improving water quality and reducing sediment yields in rivers and streams. Research in Australia has shown that streambank erosion is the most significant processes in the continuing physical and ecological degradation of riparian zones. The recently developed longstem tubestock sys ....Riparian rehabilitation and ecohydraulics: interactions between flow, sediment, vegetation and bank erosion in longstem tubestock rehabilitation works. Riparian lands are important for maintaining viable ecosystems, improving water quality and reducing sediment yields in rivers and streams. Research in Australia has shown that streambank erosion is the most significant processes in the continuing physical and ecological degradation of riparian zones. The recently developed longstem tubestock system has shown promise in controlling streambank erosion using native vegetation. However, rehabilitation practices rely on ad-hoc recipes without a thorough scientific understanding of near-bank processes. This research will fill this gap by combining field and laboratory experiments on tubestock plantings in order to develop guidelines and predictive tools for riparian zone management.Read moreRead less
Role of vegetation patchiness and self organisation in the ecohydrologic response of water limited ecosystems to climate variability and change. The semi-arid Australian rangelands are some of the most sensitive regions to degradation and climate change, particularly with respect to hydrology and ecology. Our predictive ability in these environments is quite poor, however, climatic change (particularly changes in rainfall regimes) are expected to intensify vegetation patterning, intensify erosi ....Role of vegetation patchiness and self organisation in the ecohydrologic response of water limited ecosystems to climate variability and change. The semi-arid Australian rangelands are some of the most sensitive regions to degradation and climate change, particularly with respect to hydrology and ecology. Our predictive ability in these environments is quite poor, however, climatic change (particularly changes in rainfall regimes) are expected to intensify vegetation patterning, intensify erosion and reduce runoff. This project will develop a modelling framework to better understand the impact of these natural (climate variability and change) and anthropogenic (grazing, deforestation) disturbances on runoff and erosion in these regions.Read moreRead less
Improving water use efficiency of grapevine production in the Great Western region using effluent water and soil amelioration practices. Irrigation of vineyards with municipal wastewater is a desirable option for the viticulturists of the Great Western region of Victoria, but only if vineyard soil structure is not adversely affected. This project will (1) study the impact of dissolved chemicals in the waste water on the structure of the local sandy soils; (2) model the data to enhance understand ....Improving water use efficiency of grapevine production in the Great Western region using effluent water and soil amelioration practices. Irrigation of vineyards with municipal wastewater is a desirable option for the viticulturists of the Great Western region of Victoria, but only if vineyard soil structure is not adversely affected. This project will (1) study the impact of dissolved chemicals in the waste water on the structure of the local sandy soils; (2) model the data to enhance understanding of the key chemical and physical mechanisms controlling grey water impact in heterogeneous environments. The resulting predictive tools will have direct application in the Great Western region's vineyards, and for irrigation of grey water in vineyards across Ausralia.Read moreRead less
A Fundamental Understanding of Methane Driven Denitrification. Eutrophication in waterways due to the presence of nutrients including nitrogen is a well-recognised environmental problem. Moreton Bay, for example, used to receive 3,300 tons of nitrogen each year from point sources. Stringent nitrogen discharge limits have therefore been imposed on most wastewater treatment systems across Australia. Nitrogen removal from wastewater is commonly accomplished in a biological way involving the use of ....A Fundamental Understanding of Methane Driven Denitrification. Eutrophication in waterways due to the presence of nutrients including nitrogen is a well-recognised environmental problem. Moreton Bay, for example, used to receive 3,300 tons of nitrogen each year from point sources. Stringent nitrogen discharge limits have therefore been imposed on most wastewater treatment systems across Australia. Nitrogen removal from wastewater is commonly accomplished in a biological way involving the use of bacteria. The project aims to investigate a particular bacterial community, which is able to perform nitrogen removal from wastewater with methane as a renewable carbon source. The project will therefore lead to more sustainable wastewater treatment systems.Read moreRead less