Biosolids generated during the wastewater treatment processes has become a major burden of wastewater treatment plants and an unresolved problem for major cities around the world. It is thus imperative to identify a sustainable way for the proper management of biosolids. The overarching aim of this research is to establish a robust assessment framework to estimate the environmental sustainability implications of different pathways for biosolids processing and resource recovery in an Australian context and provide information to decision makers and practitioners of the water industry on the performance of different treatment scenarios.

PhD Thesis underway by Jingwen Luo.

Petroleum hydrocarbon is one of the most common soil contaminants in many countries. Considering the magnitude and impact of this problem, remediating contaminated soils are inevitable. Several methods have been used to remediate hydrocarbon-contaminated soil, however, some of the methods are not cost effective or environment friendly. Biochar, a low cost carbonaceous product, has gained relevance for remediation of contaminated soil.

In my research, I am using biosolids as a source of biochar production. The use of biosolids in production of biochar and its subsequent application in remediation provides an opportunity to re-purpose waste from the water industry for valuable use.

Thesis underway.

Energy sector focusses to be able to meet all the requirements of sustainable national development of energy resources and efficient utilization of its diverse sources. Waste-to-energy technologies consist of various methods for extracting energy from waste materials. These methods include thermo-chemical processes such as combustion, gasification, and pyrolysis. These thermo chemical processes are highly endothermic in nature and have high energy consumption.  Fluidised bed exchangers play an important role in the “clean wastes technology” because of its high thermal efficiency, better scalability, better temperature control and high heat transfer surface area. The current project work focusses on understanding the impact of different tube configurations (size and numbers) on the fluidisation behaviour, along with heat transfer mechanisms. Computational fluid dynamics (CFD) modelling-based approach will be used to evaluate the hydrodynamics of the above system.  The results from this study, will be used to develop and establish correlations between tube size, shape, gas flow rates, and particle heat transfer mechanisms.

PhD Thesis underway by Shivani Agnihotri.

The biosolids industry in Australia has historically developed in response to the regional challenges, resources available and their markets perception and demands. This has resulted in a variety of priorities, management strategies and reuse applications currently operating nationally. To progress and take advantage of the recovered resources provided by the development of the biosolids industry a national framework providing a level field is required. The result would see the biosolids industry in an improved growth position, more effective utilisation of resources, more control over risk to health and the environment and improve our position nationally with adherence to our global responsibility targets. The mechanism to achieve these goals is estimated to be by the application of a non-prescriptive framework which has risk strategies built into progressive steps in the biosolids product development with strategies targeting specific end use.

PhD Thesis underway by Marilyn Braine.

Biosolids odour impacts communities and public perception of water utilities. This project will explore how microbial community mediates variability of biosolids odour and GHG emissions using new approaches. The project aims to:
1. Develop methods to characterise microbial community structure and function with metabolomics and flow cytometry.
2. Explain the role of microbial community in regulating emissions during anaerobic incubation.
3. Investigate how the microbial community mediates emissions variability under environmental gradients.

PhD Thesis underway by Andreas Pfeifle.

This project investigated the presence, removal and fate of illicit drugs and pharmaceuticals in wastewater treatment, using advanced instrumentation. These drugs are emerging environmental contaminants and potential hazards for the disposal and recycling of treated wastewater.  Outcomes from this project included the development of novel wastewater treatment methods and an early warning system for identifying new psychoactive drugs in the community.  The project provided benefits such as reduction in the environmental and human health risk for wastewater recycling.

PhD Thesis underway by Luis Restrepo.

This project will explore the applicability of molecular approaches for taxonomic studies and rapid identification of invertebrates in a variety of freshwater habitats. This project delivered proof of concept for using DNA barcoding to fill taxonomic knowledge gaps and identify cryptic species and has also successfully discovered new populations of the critically endangered Mt Donna Buang Wingless stonefly.

PhD Thesis underway by Edward Tsyrlin.

This project revised operational methodologies in all systems from catchment to tap providing an improved understanding of the resource and cost implications.  The research informed the development of future water plans providing improved aesthetic impact for customers.

Honours Thesis completed by Tara Callingham in August 2017.