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...

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...

Since the 1970s, migration to the Amazon has led to a growing human presence and resulting dramatic changes in the physical landscape of the Northern Ecuadorian Amazon frontier, including considerable deforestation. Over time, a second demographic phenomenon has emerged with the children of the original migrants leaving settler farms to set out on their own. The vast majority have remained in t...

Since the 1970s, in-migration has driven a growing human presence and dramatic changes in the physical landscape of the Northern Ecuadorian Amazon frontier, including massive deforestation. Over time, a second phenomenon has emerged with the children of the original migrants often leaving the settler farms of their parents to set out on their own. The vast majority stay in the Amazon region, so...

The effects and influences of various parameters upon the efficiency and the overall volumetric mass transfer coefficients are important subjects to be studied in most liquid-liquid extraction processes. One of these important parameters is surface active agent (surfactant). In this paper, in order to study the effect of sodium dodecyl sulfate (SDS) concentration on the efficiency and the a...