n eupex flender size 110 H2-DV-28B Helical gearbox H2

Flender/Flender Gear Units/Helical gearbox H2

and tools for water and wastewater treatment plant supervisors and process controllers to use in improving energy efficiency in their facilities. This project not only contributed to findi ng energy use reduction measures but also provide energy efficiency improvement tools to wastewater treatment operations personnel thus progressing the demand side management recommendations made in the South African Energy Efficiency Study. 2.2 APPROACH AND METHODOLOGY In order for the outputs of the project to be applicable on broader scale, two BNR activated sludge plants were selected as case studies viz: Zeekoegat WWTP owned and operated by the City of Tshwane. The plant has design capacity of 8 Ml/ average dry weather flow (ADWF) an uses fine bubble diffused aeration (FBDA) system JP Marais WWTP operated by the East Rand Water Care Company (ERWAT), with design capacity of 1 Ml/ ADWF. The plant uses surface aeration The project was carried out in 5 main task applicable for each plant as follows: Task 1: Collection and Analysis of WWTP Data baseline period for the study was selected. Data to enable capture of diurnal and seasonal variation of influent flow and loading, model calibration and vali dation as well as establishing baseline energy use was collected through: Analysis of historically measured/recorded data at the plant .. influent raw and settled wastewater flows and loads operating parameters for the ASP and other treatment units as well as final effluent quality power usage by different treatment units energy tariff structure and energy costs Additional 2 hour composite sampling and analysis on the influent under both dry (winter) and wet (summer) weather conditions. Samples to determine operating parameters were also collected along the treatment process. Online in strument measurements were also recorded at the same time to determine process operat ing parameters as well as aeration power consumption 2