biofilters

The biofilters are a tiny part of Columbus 'plan to expand the capacity of its sewer system and eliminate spills into the Scioto River and other waterways.

dispatch.com: RSS rvitale@dispatch.com 2010

The aquarium had to switch over to a closed water system, which recirculates the same supply of water through biofilters and aeration units; but this could only be used temporarily, as it was not adequate to properly clean and filter the water for an extended period of time.

The Great Penguin Rescue Dyan DeNapoli 2010

Trusted not just their zones, their relationships and memories, but their jobs, their life savings, their lives—whenever they trusted their automated cars or their high-speed elevators or the biofilters that kept their air breathable and the wireless energy that kept everything humming, including me.

Wired Robin Wasserman 2010

Volcanic ash that enters secondary treatment facilities, such as oxidation ponds or biofilters, will tend to reduce or halt the oxidation process until the ash settles out or is removed.

Volcanic Ash -- Effects on Waste Water and Mitigation Strategies 2009

Temporarily cover all equipment (mechanical, biofilters), including ventilation intakes, that might be directly exposed to the ash fall before or during the ash falls.

Volcanic Ash -- Effects on Waste Water and Mitigation Strategies 2009

Volcanic ash that enters secondary treatment facilities, such as oxidation ponds or biofilters, will tend to reduce or halt the oxidation process until the ash settles out or is removed.

Volcanic Ash -- Effects on Waste Water and Mitigation Strategies 2009

At least the environmental headgear had special biofilters that allowed them to breathe ambient air and talk to one another.

Genesis Force John Vornholt 2003

Treatment Plant facilities, including the necessity to house all equipment under cover; specify dust-free motors, seals and air filters; cover the biofilters; and plan for a future cover on all clarifiers.

Managing the Mt. St. Helens Volcanic Ashfall on Yakima, Washington, U.S.A. 2001

Thank God the transporter biofilters eliminated the virus.

Infiltrator W.R. Thompson 1996

We are now taking that advantage, making it with the best technical design, the best tanks, pipes, biofilters and so on in order to make it sure that we will be able to raise fish less, it will cost us less to raise each kilo of fish than any other system that is out there.

Reuters: Top News 2011