The Water Environment Federation Presents

Global Water Issues:
Planning for the Future

A FREE Collection of Technical Papers from WEFTEC®, the world’s premier Technical Exhibition and Conference

Water issues abound throughout the world with every region having its own distinct challenges. That is why the Water Environment Federation is committed to connecting the best people and ideas from around the world each year at their Technical Exhibition and Conference. With over 20,000 attendees from all regions of the world, no water challenge goes unmentioned.

Whether it’s bioremediation in Europe or desalination in the Middle East, you can be certain to find valuable information that is timely, relevant, and useful … and most importantly, includes your part of the world.

The Water Environment Federation (WEF) is dedicated to improving the quality of life through the sustainable management of water resources, water protection, and water and wastewater treatment. As an international organization, it has a responsibility to ensure that all regions of the world benefit from its expertise. These select technical papers from WEFTEC represent part of that expertise.

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This special collection of articles includes:

→ Right Sizing a Cogeneration System

If considering expanding the solids processing facilities to accommodate an expansion of liquid stream capacity and create an accessible disposal site for fat, oil and grease (FOG), this evaluation provides a payback analysis to help determine the economic viability of cogeneration and the optimum size and operating scenarios. The 20-year life cycle analysis includes projected engine down times for scheduled and unplanned maintenance and anticipated variability in daily digester gas production.

→ Reducing Operating Costs with Energy Efficient MBR Designs

MBR technology is an attractive, flexible solution for plant expansion/enhancement as well as for greenfield facilities. To provide the most cost effective and energy efficient system, enhancements with design, operations, and equipment selections are required. There are several areas within the design of an MBR plant that provide the opportunity for a cost effective design that balances capital and operating costs. Along with the operational strategies to reduce energy, energy-efficient equipment must be selected.

→ Is Thermal Oxidation of Biosolids with Energy Recovery Sustainable?

Many wastewater utilities are developing biosolids management plans (BMP) that provide a strategy for 20 to 25 years into the future. In developing BMPs, wastewater utilities are faced with many challenges, such as satisfying the customer base, satisfying internal and external stakeholders and developing a BMP that is affordable, sustainable for the future and meets regulations. With growing public pressure to reduce or cease land application, there has been renewed interest in thermal oxidation as a management strategy.

This paper presents a comparison of six different thermal oxidation process schemes with respect to their economic, energy and carbon footprints for undigested and digested solids. The results of the comparison provide wastewater utility staff and engineers with the positive answer to the question “Is thermal oxidation of biosolids with energy recovery sustainable?”