Research Journal of the Water Pollution Control Federation, Vol. 62, No. 2 (Mar. - Apr., 1990), pp. 169-176 (8 pages) The biological aerated filter is an innovative technology that combines aerobic ...

Did you know a large amount of the filtration that happens in your tank is done by microorganisms? While it’s not the whole story, biological filtration is an important factor in keeping down levels ...

Ottawa, Canada - September 24, 2008 -Microbiologically contaminated water plagues approximately 1.1 billion people in rural and peri-urban populations in developing countries. Roughly 2.2 million ...

Sustainable, biological filters called slow sand filters have been used to filter drinking water since the 1800s. They don't use any chemicals, create no waste and use very little energy. New research ...

1. The purity of a medium, as measured by the amount of reducing material present in the solution, and the food supply, are two of the principal factors influencing the distribution of Protozoa in ...

Extending the empty bed contact time (EBCT) of a biologically active filter (biofilter) can significantly improve the performance for controlling organic contaminants. For systems with excess plant ...

Objective: Students will engineer a water filter based on observations of manta ray feeding filters, then test its effectiveness. Topics: Structure and function, adaptation, engineering and design ...

Beneath the streets of New York City lies a maze of pipes through which some two billions gallons of water flow each day. Few people ever see this, and like so much of the infrastructure that powers ...

Nanometer-scale pores etched into layers of graphene can provide a simple model for the complex operation of ion channels, researchers have demonstrated. Tiny pores at a cell's entryway act as ...

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play ...