Indigo Water Group recently completed CPEs for the
City of Victor's and Town of Meeker's wastewater treatment
facilities. Victor is facing decreasing population growth and
aging facilities. Meeker is looking forward to a period of
rapid growth brought on by oil and gas exploration. Our CPEs
looked at how to minimize process bottlenecks and improve capacity
for the lowest possible cost.
Comprehensive Performance Evaluations (CPE)
A comprehensive performance evaluation looks at each individual
component of a water or wastewater treatment facility and gives them
a treatment capacity rating. Many firms stop here, but at Indigo
Water Group we recognize that every process in a treatment facility
necessarily impacts every other process. We take a holistic
approach. In addition to evaluating each unit process, we look at
the effects that each piece of the process may have on another.
A great example is centrate return in a wastewater treatment plant.
As the sludge age is increased or decreased, solids production also
increases and decreases which affects digester function and the
characteristics of the centrate or filtrate return stream.
Individual unit processes don't operate independently of the rest of
We use a combination of biological process modeling, state point
analysis, and design criteria from reputable sources such as Water
Environment Federation, Metcalf and Eddy, and the State of Colorado
to find the "bottlenecks" in the process. Often, treatment
efficiency can be increased dramatically by eliminating a single
bottleneck through operational changes or capital improvements.
At the same time, we realize that the "standard" rating isn't always
right for your facility. Data analysis, thorough characterization
of the raw influent, and past performance can be used to re-rate
facilities for more or less throughput than the "standard' rating
might give. Conservative designs may yield additional capacity
under close scrutiny.
Indigo Water Group staff are experienced in conducting CPEs for both
municipal and industrial clients.