In this study, the impacts of high-saline sewage on AGS development, performance and ecology were investigated using molecular microbiology methods.

Abstract: English

This review provides a critical assessment of the production process routes of a wide range of value-added products from WAS, their current limitations, and recommendations for future research to help promote more sustainable management of this under-utilised and ever-growing waste stream.

Highlights

• Microbial LRV validation of AGS was conducted during start-up and mature operation.
• LRV was assessed for four indicators and compared to Conventional Activated Sludge.
• Start-up of AGS did not reduce microbial indicator LRV performance.
• AGS is able to meet or exceed CAS health-based targets for pathogen removal.
• Effluent quality from AGS is unlikely to impact downstream disinfection processes.

Abstract

Highlights
 

• Two feeding strategies were compared for aerobic granular sludgeSBR operation.
• Performance of split anaerobic-aerobic and dedicated anaerobic feeding was compared.
• Start-up, performance and microbial ecology were similar under both feed strategies.
• Aerobic granular sludge ecology was different to conventional activated sludge.
• Split anaerobic-aerobic feeding is a viable, cost-effective SBR retrofit solution.

Abstract

This paper reports on the findings of a 12-month study, undertaken at SA Water and supported by the Australian Water Recycling Centre of Excellence and UniSA, which set out to explore and develop a new approach to energy benchmark and optimise water recycling systems – so-called 'energy-health' benchmarking. The project also made the first steps toward developing a new suite of energy benchmarks for a range of advanced water recycling processes.

Wastewater treatment plays a pivotal role in the protection of public and environmental health in urban precincts and in the recovery of scarce water and energy resources for an increasingly urban and growing global population. Yet wastewater treatment operations are among the most energy-intensive within urban precincts and so there is considerable scope to optimise wastewater treatment plants to improve their energy efficiency and reduce associated carbon emissions.

Highlights

• Biogas electricity is the single largest carbon offset for land-applied biosolids.
• This offset varies with primary-to-WAS ratio, SRT, sludge age and WWTP technology.
• Transport impacts are smaller than total fugitive GHG emissions in the plant.
• The fertiliser substitution offset depends on the use of total or available nutrient values.
• Soil carbon sequestration credits are important for land-applied biosolids LCAs.

Abstract