EFCT: Environmental Footprint Comparison Tool.  A tool for understanding environmental decisions related to the forest products industry.  BOD/COD/TSS. headerlink
Effects of decreased release of B O D / C O D and T S S on energy use

Wastewater treatment systems require substantial inputs of electrical energy. Depending on mill type, wastewater treatment systems can consume between 1 and 7% or more of the electricity used by the mill. The primary use for electricity in wastewater treatment operations is for the pumping, mixing and aeration necessary to support biological treatment of wastewater.

To the extent that reductions in discharges to water would necessitate installation of additional treatment system capacity or components, electrical consumption would be expected to increase. Reduced discharges brought about by source reduction activities within the mill could result in either increases or decreases in energy usage and would be mill- and project-specific with respect to net energy use. Generalizations cannot be made.

More information is available at the link to the right.

More information:

Energy use for wastewater treatment