Catalytic Conversion of Waste Plastics to Hydrocarbon Fuels. This project aims to investigate the catalytic conversion of waste plastics to liquid fuels. Plastics comprise about 20% of municipal waste by volume, and are a major environmental concern as the present practice of disposal by landfilling has long-term hazard potential and is unsustainable. We propose to study the kinetics of the catalytic degradation of pure component plastics as well as their mixtures in a laboratory screw extrusi ....Catalytic Conversion of Waste Plastics to Hydrocarbon Fuels. This project aims to investigate the catalytic conversion of waste plastics to liquid fuels. Plastics comprise about 20% of municipal waste by volume, and are a major environmental concern as the present practice of disposal by landfilling has long-term hazard potential and is unsustainable. We propose to study the kinetics of the catalytic degradation of pure component plastics as well as their mixtures in a laboratory screw extrusion reactor, compare alternative catalysts, and develop process models to be used for scale up. The process and know-how developed will contribute to sustainable development, and provide an internationally competitive advantage to Australia.Read moreRead less
Energy Neutral Anthropogenic Nitrogen Management. This project aims to develop an innovative energy-neutral biological ammonium management strategy based on a novel anaerobic ammonia oxidation pathway. Ammonium-rich waste streams from urban and agricultural settings are a major cause of eutrophication and impose severe environmental burdens to human and ecological health. This project is expected to fundamentally change how we manage ammonium pollution, and will have immediate applicability to e ....Energy Neutral Anthropogenic Nitrogen Management. This project aims to develop an innovative energy-neutral biological ammonium management strategy based on a novel anaerobic ammonia oxidation pathway. Ammonium-rich waste streams from urban and agricultural settings are a major cause of eutrophication and impose severe environmental burdens to human and ecological health. This project is expected to fundamentally change how we manage ammonium pollution, and will have immediate applicability to engineered bioreactors systems. This will provide significant benefits in supporting a wide range of industries that struggle with finding affordable and net-zero ways to manage ammonium wastes, providing an important step to reach global net-zero carbon emissions.Read moreRead less
Multiscale Modelling and Thermal Design Optimisation of Large-Scale Biomass Stockpiles for Use in Renewable Energy Products. By minimising the risk of spontaneous combustion this project will significantly contribute to the ability of the Australian sugar industry to store wet bagasse (sugar cane fibre residue) in large stockpiles. This will facilitate the year-round availability of biomass as a feedstock in renewable energy production. The mathematical models developed in this project deliver a ....Multiscale Modelling and Thermal Design Optimisation of Large-Scale Biomass Stockpiles for Use in Renewable Energy Products. By minimising the risk of spontaneous combustion this project will significantly contribute to the ability of the Australian sugar industry to store wet bagasse (sugar cane fibre residue) in large stockpiles. This will facilitate the year-round availability of biomass as a feedstock in renewable energy production. The mathematical models developed in this project deliver an enabling mechanism for facilitating the diversification of the sugar industry with the potential to produce significant financial returns for the industry. This research has the potential to initiate considerable and extremely positive, down-stream environmental impacts for Australia by enhancing feedstock production for ecologically sustainable power generation systems.Read moreRead less
Repurposing urban construction waste to create diverse wildflower meadows. Wildflower meadows have been planted extensively in European cities for aesthetic and biodiversity benefits. In SE Australia, they are stunning, but rare, features of critically endangered grassy woodlands because most native wildflowers cannot cope with intense grazing and high soil nutrients associated with agriculture. This project aims to develop a novel process for establishing native wildflower meadows in urban park ....Repurposing urban construction waste to create diverse wildflower meadows. Wildflower meadows have been planted extensively in European cities for aesthetic and biodiversity benefits. In SE Australia, they are stunning, but rare, features of critically endangered grassy woodlands because most native wildflowers cannot cope with intense grazing and high soil nutrients associated with agriculture. This project aims to develop a novel process for establishing native wildflower meadows in urban parks and degraded grassy woodlands by repurposing low nutrient mineral waste from the construction industry. It will have multiple benefits including restoring urban biodiversity, increasing people's mental well-being, developing new markets for recycled construction waste and reducing the amount of waste going to landfill. Read moreRead less
The potential of biosolids and flyash mixtures for soil remediation for revegetation of degraded land. Revegetation of land that has been subjected to land clearing or mining is often limited by the poor quality or lack of topsoil. It may prove possible to remediate these areas of land by incorporating a mixture of two waste products, biosolids and flyash. The aim in this project is to determine the usefulness of this method of land remediation by investigating the nutrient levels and fate of co ....The potential of biosolids and flyash mixtures for soil remediation for revegetation of degraded land. Revegetation of land that has been subjected to land clearing or mining is often limited by the poor quality or lack of topsoil. It may prove possible to remediate these areas of land by incorporating a mixture of two waste products, biosolids and flyash. The aim in this project is to determine the usefulness of this method of land remediation by investigating the nutrient levels and fate of contaminants in various mixtures of biosolids and flyash materials, in the absence and presence of soil minerals, and soil ameliorants such as fertilizers and gypsum.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
Drying sewage sludge using hot oil. The project seeks to investigate and develop an entirely new area of fundamental and applied research involving the process, mechanisms and kinetics of direct dehydration of sewage sludge by fry-drying in hot oil. Frying can be carried out as a drying process, though it not widely recognized or applied in this way, and has consequently not been exploited outside of the traditional food industries. It potentially provides a wide range of significant benefits ....Drying sewage sludge using hot oil. The project seeks to investigate and develop an entirely new area of fundamental and applied research involving the process, mechanisms and kinetics of direct dehydration of sewage sludge by fry-drying in hot oil. Frying can be carried out as a drying process, though it not widely recognized or applied in this way, and has consequently not been exploited outside of the traditional food industries. It potentially provides a wide range of significant benefits for sludge drying, including high efficiency and low costs, and produces a non-offensive product with a high energy value suitable for (renewable) power generation.Read moreRead less
Creating pH-sensitive self-healing concrete using sludge waste for sewers. In Australia, our 117,000 km of concrete sewer pipes are currently internally corroding at a depth rate of 1-3 mm per annum. The repair of deteriorated concrete is costly and often short-lived. Based on an advanced composite technology, this project will develop a pH-sensitive self-healing concrete that can repair itself without human intervention at the early stage of corrosion. Sludge waste from drinking water treatment ....Creating pH-sensitive self-healing concrete using sludge waste for sewers. In Australia, our 117,000 km of concrete sewer pipes are currently internally corroding at a depth rate of 1-3 mm per annum. The repair of deteriorated concrete is costly and often short-lived. Based on an advanced composite technology, this project will develop a pH-sensitive self-healing concrete that can repair itself without human intervention at the early stage of corrosion. Sludge waste from drinking water treatment will be utilised as a healing agent to mitigate the corrosion. Combined experiments and molecular dynamics simulation will uncover all aspects of the healing process to enable the practical application of this technology. The findings will extend the lifetime of concrete structures and promote a circular economy.Read moreRead less
An optimally integrated treatment process for food waste and wastewater to maximise sustainability in a decentralised treatment plant. Decentralised small scale treatment plants are required for remote communities, resort locations and 'rural residential' developments. This project has access to an operational plant in urban Brisbane serving 21 houses, the first development in urban Australia with full approval for an onsite treatment facility. The plant has been designed to treat an integrate ....An optimally integrated treatment process for food waste and wastewater to maximise sustainability in a decentralised treatment plant. Decentralised small scale treatment plants are required for remote communities, resort locations and 'rural residential' developments. This project has access to an operational plant in urban Brisbane serving 21 houses, the first development in urban Australia with full approval for an onsite treatment facility. The plant has been designed to treat an integrated kitchen waste and blackwater stream, with upstream anaerobic digestion that reduces the survival of wastewater pathogens and generates soluble organic carbon for the biological removal of nitrogen and phosphorous. The project will produce expertise in decentralised treatment systems, including the development of two PhD students in this area.Read moreRead less
An Integrated Biotechnological Process for Production of Lactic Acid from Carbohydrate-Waste Streams by Rhizopus sp. Lactic acid is the most widely occurring multifunctional organic acid. It has enormous applications in food and food-related industries, and great potential use for production of biodegradable and biocompatible polylactate polymers. The aim of this research is to develop an innovative biotechnological process, incorporating simultaneous saccharification and fermentation, which int ....An Integrated Biotechnological Process for Production of Lactic Acid from Carbohydrate-Waste Streams by Rhizopus sp. Lactic acid is the most widely occurring multifunctional organic acid. It has enormous applications in food and food-related industries, and great potential use for production of biodegradable and biocompatible polylactate polymers. The aim of this research is to develop an innovative biotechnological process, incorporating simultaneous saccharification and fermentation, which integrates the production of lactic acid with the treatment of high strength food industry ?effluent? streams - carbohydrate waste streams. The proposed SSF process will cultivate an identified fungal Rhizopus sp strain on the waste streams, as production substrates, leading to an environmentally friendly and economically sustainable new technology for the food industry.Read moreRead less