Without using microorganisms or biological substances, Dr. Nguyen Trong Anh applies steel slag to treat phosphorus in wastewater, removal efficiency is up to 99.88%.
Dr. Nguyen Trong Anh, Department of Chemical Engineering and Environment, Lac Hong University (Dong Nai) and colleagues used steel slag from photovoltaic furnaces, removed impurities, crushed into granules with a size of 5- 10 mm, reduce friction and separate from magnetism.
After obtaining the stable filter material, the team tested the material at a seafood processing company. The results showed that the steel slag particles removed dissolved phosphorus from wastewater with the largest adsorption efficiency of 0.29 mg phosphorus / g slag.
Steel slag particles after being treated to use as waste adsorption material. Photo: NVCC.
In steel slag contains calcium oxide (CaO) (up to 35%). This is the main ingredient capable of absorbing phosphate ions in wastewater. This ion is responsible for eutrophication, increasing the appearance of