Nanobubbles (NBs) have potential properties, are environmentally friendly, and are sustainable to be used in a variety of applications: industries, agriculture, medical technology, and engineering applications such as water/wastewater treatment. This paper focuses on improving the characteristics of municipal secondary effluent (SE) utilizing oxygen bubbles (OBs), conventional coarse air bubbles (ABs), oxygen nanobubbles (ONBs), and air nanobubbles (ANBs). NBs were ... إقراء المزيد