The aim of this study is to prepare biogenic sulphides by using bacteria for the removal of zinc cations from their solutions. The production was realized in a bioreactor under anaerobic conditions at 30 °C. Sorbents were prepared by sulphate-reducing bacteria in different nutrient medium modifications, under two modes of bacteria cultivation. Created precipitates of iron sulphides were removed...

About 1.6 billion tons of food are wasted worldwide annually, calling for advanced methods to recycle waste into energy and materials. Anaerobic digestion kitchen allows the efficient recovery energy, induces low-carbon emissions. Nonetheless, stability biogas production variables, due dietary habits seasonal diet variations that modify components waste. Another challenge is recycling digestate...

The operating characteristics of six full-scale wastewater treatment plants using the staged, closed loop bioreactor process known as orbal were evaluated to determine the degree of simultaneous biological nutrient removal (SBNR) occurring. Low effluent total nitrogen concentrations indicate that simultaneous nitrification and denitrification occurs reliably in these facilities. The use of SRT ...