Wastewater reed bed treatment takes off after Heathrow airport upgrade

Sponsored by

 Wastewater reed bed treatment takes off after Heathrow airport upgrade

Heathrow Airport has upgraded its wetland installation to process increased amounts of wastewater generated from the deicing of runways.

Waste streams generated from airports are typically from de-icing activities, aircraft wash down, fire fighting training and the terminals themselves. Airports have large areas of concrete and tarmac which collect rainwater which becomes contaminated as it mixes with fuel and glycol residues.

The original treatment wetlands at the airport were designed to remove deicers containing glycols using anaerobic processes with a design loading rate of 590kg BOD/d.

They were the right size for the volume of water but increased use of deicer over the past few years had overloaded the system therefore oxygen and nutrient availability were compromising treatment performance.

On occasion, effluent was tankered off-site for treatment which ARM Group said was "expensive and inefficient".

Treating glycol contaminated runoff is a challenge at every airport faced with varying cold-climate winter conditions. The runoff can contain over 20,000 mg COD/L at 1ºC.

Heathrow chose to upgrade its passive constructed wetland to the ARM Group’s innovative Forced Bed Aeration (FBA) system, which comprises a network of tubes bubbling air through the gravel to increase the oxygen availability of the existing system. 

Oxygen-rich conditions are said to help degrade the glycols and acetates.

ARM has previously worked with Teeside, Belfast and Buffalo Niagra airports.

Tori Sellers, director of ARM Group, said: “Their challenge is keeping their runways open during increasingly harsh winters. That involves using higher concentrations of deicer which mixes with surface water run-off which then requires treating.”

###

Read more

Reed bed treatment set to branch out in Oman

Oman spreads its roots: reed bed water treatment plant to expand

Sponsored by

RELATED PRODUCTS

TODAY'S HEADLINES

EPA to approve newest list of impaired waterways in California

According to a new list of impaired waterways in California, more than 40,000 miles of the state's rivers and streams are currently threatened by pollution.

AMTA, AWWA announce extension in hosting Membrane Technology Conference & Exposition

The American Membrane Technology Association has announced an extension of its partnership agreement with the American Water Works Association (AWWA) in hosting the annual Membrane Technology Conference and Exposition through 2020.

IL city better protects drinking water with advanced UV disinfection technology

In an effort to better protect its drinking water, the city of Taylorville, Ill., recently incorporated advanced ultraviolet disinfection technology at its new drinking water treatment facility.

MWRD earns several Peak Performance Awards for water treatment compliance

The Metropolitan Water Reclamation District of Greater Chicago was recently recognized with seven prestigious awards from the National Association for Clean Water Agencies for its record in meeting compliance for water treatment.

FOLLOW US ON SOCIAL MEDIA

  

 


© 2015. PennWell Corporation. All Rights Reserved. PRIVACY POLICY | TERMS AND CONDITIONS