Analysis of Energy Consumption and Saving in Wastewater Treatment Plant: Case Study from Ireland

Olumide Wesley Awe, Ranbin Liu, Yaqian Zhao



Worldwide, high energy consumption affects the wastewater industry and it is second in cost only to manpower for most wastewater treatment plants (WWTPs). The need to meet the new effluent limits and water quality standards, has led to implementation of new technologies, which has also led to considerable increased energy consumption in WWTPs. At the same time, energy price is on the rise and as oil prices continue to fluctuate, thereby increasing their operating costs. Those increases will be compounded by the need to meet additional stringent regulations that will require energy-intensive treatment processes to achieve the required effluent quality. Energy production, usage and saving in wastewater treatment plant (WWTP) have been reviewed and discussed while one WWTP in Ireland have been examined in order to: (i) identify energy/resource recovery strategies, (ii) explore the potential applications in the plant, (iii) to promote the commercial, and large-scale application at WWTPs.