November 2010, Vol. 22, No.11

A 'Grand' challenge

Monitoring and assessing water quality in the middle Grand River, Ontario

Feature 1 art José R. Bicudo, Jim Perrone, Mark Anderson, Scott Robertson, Dana Summach, and Lynette Renzetti

Significant population growth in southern Ontario is a major challenge for the future of the Grand River. Most cities located in this watershed rely on the river or wells for their water supplies, and discharge their treated wastewater into the river or its tributaries. Long-term planning in combination with an effective water quality monitoring and assessment program can help predict changes to the river. Targeted monitoring also will provide essential information to optimize the wastewater treatment plants that discharge to the Grand, with the ultimate objective of improving water quality in the river. Read full article (login required)


A tale of two flows

Florida plant gains wastewater capacity by reducing two types of inflow and infiltration

Feature 2 art Walter Schwarz

Known as the “Venice of America,” Fort Lauderdale, Fla., boasts an intricate network of canals, miles of golden beaches, and some of the world’s most recognized coral reef systems. To safeguard its valuable tourism industry, protect the public’s health and safety, enhance the quality of life for residents and businesses, and ensure a sustainable future for its community, the City of Fort Lauderdale partnered with CH2M Hill (Englewood, Colo.) to implement WaterWorks 2011 — a $740 million citywide program management initiative to overhaul Fort Lauderdale’s water, wastewater, and sewer infrastructure.

Originally a 20-year capital improvement plan, the program was compressed to a 10-year timeframe and scheduled for significant completion by 2011, the city’s 100-year anniversary. Although the WaterWorks program focused mostly on new construction, the city also invested $35 million in trenchless technology to repair the existing collection system. Read full article (login required)


Operations Forum Features

Resurfacing a reputation

Shotcrete rehabilitation deserves a fresh look

Feature 4 art John Morgan

For many years, the City of Indianapolis Department of Public Works (DPW) has been finding great value in shotcrete to preserve its large-diameter sewer pipe, especially interceptors. The city has embraced the use of shotcrete for large-diameter sewer rehabilitation projects, and the costs just keep getting lower.

Shotcrete rehabilitation sometimes gets a bad rap, but the technology is efficient and gets better all the time with additional additives for corrosion resistance and increased structural strength. Read full article (login required)


Twice is nice

Ensuring adequate preliminary treatment for a membrane bioreactor

Feature 5 art John Koch, Eric Hielema, and Ben McConkey

Not all screens are created equal. Finding the right screen or combination of screens to prepare flows for membrane treatment can substantially reduce maintenance tasks and even improve system performance.

The LOTT Clean Water Alliance (Olympia, Wash.) learned this lesson firsthand at its Martin Way Reclaimed Water Treatment Plant. The 7600 m3/d (2-mgd) plant is an unattended scalping plant that receives its flow from the Martin Way Pumping Station in Lacey, Wash. The plant, which was initially completed in 2006, uses a membrane bioreactor to produce reclaimed water that is pumped to local residents and used for irrigation and to supply constructed wetlands and groundwater recharge basins. Read full article (login required)


Trucking in technology

Pennsylvania DEP’s wastewater plant performance evaluation program benefits area utilities 

Feature 6 art Marc Austin Neville

Since early 2009, the Pennsylvania Department of Environmental Protection (DEP) has been conducting performance evaluations at wastewater treatment plants (WWTPs) upstream of drinking water facilities. A part of these evaluations, which are designed to optimize WWTP operations and thereby improve surface water quality at the intakes of those downstream drinking water facilities, includes familiarizing operators with new on-line monitoring equipment and process monitoring and control techniques. Read full article (login required)



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