IEEE Power & Energy Magazine - January/February 2017 - 40
Methane Generation Potential from Wastewater Treatment
Tonnes/Year
>5,000
2,500-5,000
1,000-2,500
500-1,000
<500
This analysis estimates the methane generation potential of wastewater treatment plants using methodology from the EPA's
inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2011 and data from the EPA Clean Watersheds Needs
Survey (2008). The results were further aggregated to country level.
figure 6. Wastewater plants provide opportunities for electric power generation fueled by biomass. EPA: U.S. Environmental Protection Agency. (Image courtesy of the National Renewable Energy Laboratory.)
(SCADA) systems, forward osmosis, bubbleless aeration,
membrane distillation, capacitive de-ionization, and emerging
biological treatment processes. Deploying these energy-efficient technologies will require a comprehensive assessment,
from lab-scale to field demonstration, to characterize their
performance in real-world applications.
In addition, the adoption of end-use energy and water conservation methods by the business and residential sectors would
reduce the imbedded energy and water required to meet those
needs. Current research into new technologies to conserve water
and energy at end use will have ripple effects on water and
energy conservation upstream. In addition to the potential for
energy- and/or water-use savings, these technologies could also
provide opportunities to more effectively treat water in municipal and industrial applications that currently use chemical treatment. End-use conservation would directly reduce water and
energy demand. Some examples of efficiency opportunities in
water treatment/WWT are discussed in the following.
40
ieee power & energy magazine
Efficiency via Data Monitoring
and Process Control
As with any complex industrial process, the potential for
efficiency gains via computer-based monitoring and control in water and wastewater systems is significant. Monitoring and control technologies vary from simple devices
to advanced SCADA systems. SCADA systems are used
for precise control of key equipment and processes, including raw-water wells, water treatment, and distribution
pumping. Typically, these SCADA systems pull data from
field devices, such as programmable logic controllers, remote terminal units, and electric meters, and analyze/format the data to be viewed by operations staff or used for
process control. SCADA systems are being implemented
in the water and wastewater industries, but traditionally
there has been a greater focus on improving process quality and reliability than on controlling systems to optimize
energy efficiency.
january/february 2017
Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - January/February 2017
IEEE Power & Energy Magazine - January/February 2017 - Cover1
IEEE Power & Energy Magazine - January/February 2017 - Cover2
IEEE Power & Energy Magazine - January/February 2017 - 1
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IEEE Power & Energy Magazine - January/February 2017 - Cover3
IEEE Power & Energy Magazine - January/February 2017 - Cover4
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