A method to calculate and express energy consumption of industrial wastewater treatment for the purpose of water reuse. Biological processes
13.060.01 - Water quality in general
13.060.30 - Sewage water
This document sets out the general principles for, and provides
guidance on, the quantitative characterization of the energy
consumed by industrial biological wastewater treatment systems. It
does not aim to characterize the treatment pollutants removal
performance or process reliability or any other consideration in
the selection of a wastewater treatment system.
This document includes the following sub-systems of biological
Biological reactors, which might be suspended growth or
fixed film processes or a combination thereof, and can include
anaerobic, anoxic and/or aerobic tanks and/or zones.
Solid-liquid separation processes such as sedimentation,
flotation, or membrane filtration, used for clarification of
the water before discharge to downstream processes, which can
also involve the return of a the separated solids as sludge
back to the biological reactor.
Any pumps, blowers and mixers for water circulation, mixing
and air supply in and between the sub-systems listed
Heating or cooling of the water for treatment.
This document does not include the following subsystems of the
biological treatment system:
Wastewater feed pumps.
Pre-treatment systems, which for the purposes of this
document also include preliminary and primary treatment
processes, such as but not limited to, screening,
sedimentation, dissolved air flotation, chemical oxidation, oil
Post-treatment processes, such as but not limited to,
disinfection, desalination, ion exchange, sludge treatment and
Site lighting or any energy consumption involved in office
Energy recovery from processes such as anaerobic reactors
Filtration processes, which are sometimes part of the biological
treatment process and at other times part of the post treatment,
are referred to separately within this document.
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