A simple and low-cost apparatus for continuous and efficient liquid-liquid extraction, which does not need continual mechanical forces (stirring, shaking, etc.) other than solution sending, has newly been developed. This apparatus, named "emulsion flow" extractor, is composed of a column part where an emulsified state fluid flow (emulsion flow) is generated by spraying micrometer-sized droplets...

A new 1-D model for the secondary clarifier was recently presented. The decisive difference to traditional layer models is that every detail of the implementation is in accordance with existing PDE theory. Moreover this new model does not only focus on hindered settling but also allows accounting for compressive settling. In this contribution, the behaviour of this new settler model is compared...

In a recent comment, David Albouy claims that the data series we constructed for European settler mortality in Acemoglu, Johnson and Robinson (2001) suffers from “inconsistencies, questionable judgements, and errors.” He proposes two series, for “barracks” and “campaigns,” that he claims are better measures of settler mortality, and shows his recodings weaken or eliminate the first-stage relati...

SOCIOLOGISTS INFORMED BY CRITICAL, anticolonial praxis are called to reflexively consider social realties as they are, while actively participating in social transformation. I write from my position as a settler in Misâskwatôminihk (Saskatoon) on Treaty 6 territory and the homeland of the Métis and as an engaged sociologist. By settler, I do not simply mean “non-Indigenous”—like many non-Indige...

Solids removal across two settling devices, i.e., a swirl separator and a radial-flow settler, and across a microscreen drum filter was evaluated in a fully recirculating system containing a single 150 m ‘Cornell-type’ dual-drain tank during the production of food-size Arctic char and rainbow trout. The flow through the culture tank was 4500–4800 L/min. Approximately 92–93% of the system flow e...