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Abstract Increase in anthropogenic activities proliferated the consumption of resources such as phosphorus; and increase the adverse environmental impacts especially eutrophication on water resources such as lakes. Nutrient recovery from domestic wastewaters to produce a fertiliser has been explored to address these challenges in the context of a sustainable circular nutrient economy. Life cycle assessment (LCA) was performed to holistically assess the impacts of integrating a nutrient recovery system on wastewater and water resource management using Laguna de Bay, Philippines as the geographical boundary. The inventory was developed based on the results of the emerging nutrient recovery reactor operations and the application of the recovered fertiliser on the agricultural crops. The LCA results for the proposed scenario showed environmental benefits of about 83.6% freshwater eutrophication, 102.5% terrestrial ecotoxicity, 26.9% water consumption, 100.7% mineral resource scarcity, while the global warming potential is 95.4% higher than the baseline scenario. Results imply policy review for septage management, system optimisation, and evaluation of alternative methods of wastewater management, in terms of life cycle thinking and sustainability across the globe.

Abstract The current work explores the treatment of dye wastewater using the combination of photocatalysis and ceramic nanofiltration process. Commercial ceramic membrane and titanium dioxide (TiO2) photocatalyst were used in this study to investigate the removal of Brilliant Green (BG) dye from the synthetic dye wastewater solution. The effect of various operating parameters on dye decolorization and total organic carbon removal were investigated. The operating parameters (pH, catalyst loading and time duration) were optimized using an experimental design model namely Response Surface Methodology (RSM). The use of experimental design by RSM resulted in the improvement of dye decolorization at optimum conditions. In addition to these operating parameters, the trend of initial dye concentration and the influence of catalyst loading on permeate flux was also studied. Around 99% of decolorization was obtained by the hybrid system at 500 mg L− 1 of dye concentration, 1 g L− 1 of TiO2 dosage, pH of 4.2 and 90 min. The integrated system i.e. photocatalytic reactor with nanofiltration membrane has shown complete removal of BG dye compared to individual systems. From the present study, it can be concluded that this integrated system is one of the efficient methods for dye treatment.

Resilience is a multi-faceted concept that traces its evolution based on the field of discipline wherein it was used. Various researchers have defined the term throughout the years according to their own expertise. This has impacted the development and evolution of the concept and how it was used in each specific discipline. One of the most recent and important use of the term is in the disaster paradigm. This paper traces the evolution of the definition of resilience and narrows it down to the disaster realm, eventually focusing on small islands as a socio-ecological system. It also discusses the relationship of resilience with vulnerability and enumerates the various tools and methods that have been used to measure both concepts. This review also presents an integration which identifies social, economic and ecological resilience as the different facets of disaster resilience of small islands. This paper reveals that there are gaps in defining disaster resilience of small islands through a socio-ecological systems approach. Moreover, there are few studies on using the participatory approach for determining indicators of disaster resilience which contributes to a research-policy gap in resilience studies. The paper recommends a strong future research direction on how to translate research findings into a tool that could help communities at the local level, especially those living in small islands.