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This study assesses a modified anaerobic granular bed baffled reactor (GRABBR) which was assessed for wastewater treatment at high organic loading rates (chemical oxygen demand > 1100 mg/l) under varying temperatures. For the two mesophilic temperatures tested (37 ˚C and 25 ˚C) under steady state conditions, the removal of Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) was 80 to 90 %. At lower organic loadings, the reactor operated as a completely mixed system with most of the treatment occurring in the first two compartments. The GRABBR also showed very high solids retention with low effluent suspended solids concentration for all organic and hydraulic conditions. Applications of GRABBR as a single unit, two-phase treatment system could be an economical option reducing the cost to achieve similar treatment goals of high strength wastewaters. The findings of this research suggest that the application of GRABBR is suitable for treatment of multiple pollutants pre...

Screening life cycle assessment models developed to investigate hypothetical disposal and recycling options for the Windscale Advanced Gas-cooled Reactor heat exchangers were used to generate more complex models addressing the main UK radioactive metals inventory. Both studies show there are significant environmental advantages in the metals recycling promoted by the current low level waste disposal policies, strategies and plans. Financial benefits from current metals treatment options are supported and offer even greater benefits when applied to the UK radioactive metals inventory as a whole.