CH2M HILL made a twist on the usual placement of a dissolved air flotation (DAF) system, placing it at the beginning of the process train rather than in the solids-treatment train, where it is usually located in wastewater treatment facilities.
A decade ago, Pima County's Regional Wastewater Reclamation Dept., or RWRD, was facing a problem: The Arizona Dept. of Environmental Quality had ruled that the levels of nitrogen coming from RWRD's network of 10 wastewater-stripping and treatment plants were too high.
Wastewater utilities are pleased the U.S. Environmental Protection Agency has released a fleshed-out framework to give local governments more flexibility in managing stormwater runoff and wastewater.
Builders of mass transit systems seem cautiously optimistic about the future, buoyed by steady ridership figures and the recent rally to overcome threats to dedicated funding.
The U.S. Conference of Mayors is calling on the U.S. Environmental Protection Agency to move forward with a new Integrated Planning and Permitting Policy, or IP3, that is being discussed as an improvement to the agency's legal enforcement programs for stormwater management and combined sewer overflows.
In their quest to bring swift repairs to a critical floodway and fill a huge scour hole left after the U.S. Army Corps of Engineers breached Mississippi River levees to fight record floods in 2011, engineers have turned to innovative strategies to cope with an environmentally sensitive complication: a blue hole.
RSS
