Water Environment & Technology (WE&T) is the premier magazine for the water quality field. WE&T provides information on what professionals demand: cutting-edge technologies, innovative solutions, operations and maintenance, regulatory and legislative impacts, and professional development.
Under a consent order to minimize untreated wastewater discharges during wet weather events, the Columbus, Ohio, Division of Sewerage and Drainage evaluated treatment processes that could handle intermittent high-volume, low-strength flows. After reviewing several alternatives, the city decided to pilot-test two promising high-rate clarification systems. Both use ballasted flocculation to treat wet weather flows.
Planning, Communication Make Conduit Rehabilitation Project Go Smoothly
Add hydrogen sulfide to a reinforced concrete box conduit for 30 years, and you have a formula that has the potential to produce a catastrophic failure. As much as half the thickeness of the roof from the 12-ft by 9-ft (3.7-m by 2.7-m) primary effluent box conduit at the Metro Wastewater Reclamation District (Metro; Denver) South Plant had eroded when the problem was discovered. Metro acted swiftly and surely to orchestrate the massive bypass and construction project needed to rehabilitate the conduit.
Gulf Coast Utilities Require $1.2 Billion To Rebuild, Report Says
It will cost $1.2 billion to repair and rebuild wastewater utility treatment and collection systems damaged by Hurricane Katrina, according to an April 25 report prepared by the Water Environment Federation (WEF; Alexandria, Va.) and Black & Veatch (Overland Park, Kan.). The report, Assessment of Reconstruction Costs and Debt Management for Wastewater Utilities Affected by Hurricane Katrina, estimates that these utilities will need approximately $163 million during the next 5 years to offset lost revenues from reduced populations and remain financially stable.
Coming in the next issue:
If the Grid Goes Down. Options for WWTPs to generate their own electricity during service interruptions.
Beating the Heat. Taking a proactive approach to customer service to prevent customer fires before they start.
It Takes More Than a Village. Collaborative problem solving can be an effective tool in making effective and broadly accepted decisions.
Long-Distance Plan. Being an effective remote manager requires a special touch and extra effort.
Homegrown Talent. Giving operators the tools they need to become successful supervisors.
Decon Dilemma. Cleaning chemical, biological, or radioactive agents from water takes great care.
WEFTEC®.06 Preview. Get a sneak peak at WEFTEC workshops and sessions, so you can plan ahead for Dallas.