Fig. 4: Variable OPEX of benchmark configurations.
From: An agile benchmarking framework for wastewater resource recovery technologies
The stacked bars show the QSDsan-simulated contributions of different expenditure to OPEX, including power utility (aeration, pumping, mechanical mixing), chemicals (carbon, coagulant, lime), and sludge disposal. WRRF configurations are categorized by their design treatment level as indicated by the acronyms at the top of the graph (rBOD, NIT, BNR).
