Abstract

Energy demand of a wastewater treatment plant is mainly based on the volume of wastewater treated and organic load. In order to obtain energy efficiency in wastewater treatment plants, these significant parameters should be considered. Dairy wastewater has a high organic content. In this study, the impact of design organic loading parameter on energy cost for a dairy wastewater treatment plant was investigated. The aim of the study is in order to reveal the role of design biological oxygen demand on energy efficiency. A new development model that is energy cost indicator has been used. This index was figured out for both design organic load and operational organic load. The results revealed that energy cost indicator of operational organic load was higher than design organic load that were 2.1 x10-8 and 7.2x10-18, respectively. If WWTPs are operated at design organic load, energy cost would be lower.

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