Chicken Manure represents one of the largest organic waste streams in Australia. Anaerobic Digestion is an alternative waste treatment method that carries the advantage of biomethane production. The use of chicken manure as a feedstock for anaerobic digestion can generate not only biogas, but a digestate rich in nutrients that can be used as a biofertilizer, creating a circular economy. However, the use of chicken manure as a feedstock for anaerobic digestion can be challenging due to its high nitrogen content. In this project, the addition of biochar, a cost-effective carbonaceous material made from the pyrylosis of biomass, to mitigate the ammonia stress that accompanies the anaerobic digestion of chicken manure. Ultimately, the use of biochar can improve biomethane production.

PhD Thesis underway by Tien Ngo.

Sludge-drying lagoons are used in Australia as a convenient and cost-effective method of de-watering wastewater sludge. Methane emissions from these lagoons have been estimated to represent up to two thirds of total greenhouse gas emissions of the wastewater treatment, and will need to be addressed for water utilities to meet emission reduction targets. This project will investigate operational interventions that have the potential to select for novel microorganism capable of oxidising methane as a means of reducing emissions.

PhD Thesis completed by Sarah Aucote.

The steam produced by boiling a kettle of salty water can be collected, condensed and drunk. Membrane distillation is an analogous process to this, but in this study the salty feedwater forms a salt-free vapour at a lower temperature; 30 – 40°C. The warm feedwater and vapour are pumped past a thin, porous membrane which repels liquid water but allows vapour to pass through the pores into a cold stream of freshwater on the other side. The vapour condenses and increases the volume of fresh, salt-free water. In this project an operational pilot plant was built and installed at an electricity generating station which produces waste heat and a stream of salty effluent that is normally discarded. The pilot plant was equipped with a 0.67m2 membrane, ran continuously for 3 months, and produced an average of 2.2L freshwater per hour. This equates to 3.4L/h/m2. The membrane area can be scaled up to increase production. It was concluded that this is a viable treatment technology for industrial wastewater that emits minimal greenhouse gasses.