This study aims to discern the domestic gray water (GW) sources that is least polluting, at the urban households of India, by examining the GW characteristics, comparing with literature data, reuse standards and suitable treatment technologies. In view of this, the quantitative and qualitative characteristics of domestic GW originating from bath, wash basin, laundry and kitchen sources are determined and compared with established standards for reuse requirements. Quality of different gray water sources is characterized with respect to the physical, chemical, biological, nutrient, ground element and heavy metal properties. The pollutant loads indicate that the diversion techniques are not suitable for household application and, therefore, treatment is necessary prior to storage and reuse. It is observed that the total volume of GW generated exceeds the reuse requirement for suggested reuse such as for flushing and gardening/irrigation. In spite of generating less volume, the kitchen source is found to be the major contributor for most of the pollutant load and, therefore, not recommended to be considered for treatment. It is concluded that treatment of GW from bathroom source alone is sufficient to meet the onsite reuse requirements and thereby significantly reduce the potable water consumption by 28.5 %. Constructed wetland systems and constructed soil filters are suggested as suitable treatment alternatives owing to its ability to treat highly variable pollutant load with lower operational and maintenance cost, which is more practical for tropical and developing countries. Keywords Gray water composition Á Gray water treatment Á Water treatment technologies Á Urban water reuse Á Domestic gray water

The COVID-19 pandemic has caused severe disturbances in the work of hundreds of millions of people around the world. One of the groups affected is the academic staff at higher education institutions, whose original business model, i.e., presence teaching, suddenly changed to online learning. This has, in turn, exacerbated pre-existing problems such as shortage of time, busy schedules, and challenges to a work-life balance. Since academic staff plays a key role in respect of teaching and research, often acting as leaders in their fields, it is important to reflect on the influences of the lockdowns on their work routines. In order to address this research need, this paper reports on a study that examined the impacts of the lockdowns on the work of academic staff at universities. Using a bibliometric analysis and investigation of a set of case studies, the study sheds light on the difficulties encountered and the means deployed to address them. Our study did not identify a one-size-fits-all response to manage the manifold changes brought on HEIs by the COVID-19 pandemic. Selected arising priorities include creating a culture of educational resilience through a container of complementary measures.

No abstract

No abstract

No abstract