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The moving bed biofilm reactor (MBBR) is a biological wastewater treatment process in which microorganisms grow as biofilms on suspended carriers. Conventionally, MBBRs are mainly designed and optimized based on the carrier surface area, neglecting the dynamic relationship between carrier design, reactor operation and biofilm characteristics, such as biofilm thickness and the composition of the mi

A new principle for mainstream nitrogen removal through nitritation followed by anammox was studied in a two-stage moving bed biofilm reactor (MBBR) configuration. The first stage was optimized for nitritation by using thin biofilms and a feed alternating between synthetic mainstream wastewater at 15°C and, for shorter periods, synthetic reject water at 30 °C. The exposure of the biofilm to rejectA new principle for mainstream nitrogen removal through nitritation followed by anammox was studied in a two-stage moving bed biofilm reactor (MBBR) configuration. The first stage was optimized for nitritation by using thin biofilms and a feed alternating between synthetic mainstream wastewater at 15°C and, for shorter periods, synthetic reject water at 30 °C. The exposure of the biofilm to reject

Developed states have what might charitably be called a schizophrenic attitude towards international refugee law. Determined to remain formally engaged with refugee law and yet unwavering in their commitment to avoid assuming their fair share of practical responsibilities under that regime, wealthier countries have embraced the politics of non-entrée, comprising efforts to keep refugees away from

This book offers an in-depth examination of the strategic use of State sovereignty in contemporary European and international affairs and the consequences of this for authority relations in Europe and beyond. It suggests a new approach to the study of State sovereignty, proposing to understand the use of sovereignty as games where States are becoming more instrumental in their claims to sovereignt

Is there still a right to seek asylum in a globalised world? Migration control has increasingly moved to the high seas or the territory of transit and origin countries, and is now commonly outsourced to private actors. Under threat of financial penalties airlines today reject any passenger not in possession of a valid visa, and private contractors are used to run detention centres and operate bord

From an airstrip in Saudi Arabia, the CIA launches drones to 'legally' kill Al-Qaida leaders in Yemen. On the North Pole, Russia plants a flag on the seabed to extend legal claim over resources. In Brussels, the European Commission unveils its Emissions Trading System, extending environmental jurisdiction globally over foreign airlines. And at Frankfurt Airport, a father returning from holiday is

Colour constancy is the capacity of visual systems to keep colour perceptionconstant despite changes in the illumination spectrum. Colour constancy hasbeen tested extensively in humans and has also been described in manyanimals. In humans, colour constancy is often studied quantitatively, butbesides humans, this has only been done for the goldfish and the honeybee.In this study, we quantified colo