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.
How Much Capacity Does It Really Have?
Staff at activated sludge treatment plants with sedimentation need to know exactly how much capacity their secondary clarifiers have. Knowing the secondary clarifiers’ capacity can help staff avoid solids loss and associated permit violations during peak-flow events. It also helps utility managers plan better for improvements needed due to population growth, capacity shortfalls, or more-stringent regulations for peak wet weather treatment.
Researchers compared two models commonly used to evaluate secondary clarifier treatment capacity: state point analysis (SPA) and 2Dc. They modeled secondary clarifiers at five municipal wastewater treatment plants to determine the advantages and disadvantages of both models.
After its initial screenings-handling system failed, the 110-mgd (416,000-m3/d) Dallas Water Utilities Southside Wastewater Treatment Plant installed stopgap measures to continue operation of its bar screens. However, those measures led to additional unsavory work for operators, extreme odor problems, insect infestations, and higher landfill costs.
Then, in 2007, the plant began a renovation that included a number of important updates. Comparing the system before and after the renovation shows a striking contrast. The project has resulted in significant improvements in operations efficiency, labor cost savings, and appearance, as well as improvements in operator morale, health, and safety.
State of the Industry
With a new year comes new predictions for what lies ahead. Hear about what wastewater experts say is in store for the industry in regard to the economy, infrastructure funding, and White House perspectives on environmental regulations for 2010. Read more
Coming in the next issue:
Choosing the Right Dewatering Technology for Your Plant
Wastewater treatment plant operators know that managing the treatment process is a balancing act. Every component is related to all the others, so selecting the appropriate dewatering technology is critical to system performance. In the February issue, you’ll learn more about choosing the most appropriate options for different plant sizes and end uses. Then, you can follow one plant’s progress as its team tests four dewatering technologies, and ultimately determines which one will provide the best fit.
Also in this issue:
- Treat It or Move It. Virginia facility upgrade must meet balance exceptionally low limits and population growth.
- Changes Ahead. Water management professionals should account for climate change when working with TMDLs.
- Cost-Effective Operator Training. Virtual treatment plant models aid in critical knowledge transfer.
©2010 Water Environment Federation. All rights reserved.