Wastewater and Abrasive Sludge Recycling Solutions from Abrasive Water Jet Cutting Machines (AWJCM).

Due to the pressure that landfills have on the environment, the article deals with the possibility of recycling waste from abrasive water jet cutting machines (AWJCM) because this waste either takes the path of storage (abrasive sludge) or is discharged into public sewer systems (wastewater). Thus, for the abrasive sludge, two new mortar recipes were proposed, made by replacing fractions of sand with abrasive sludge. The series of cast samples R1 and R2 were subjected to mechanical tests and an increase in bulk density was found with the replacement of parts of the sand component with abrasive sludge, a decrease in mechanical tensile strength in bending and compression, which can be explained by the fact that wet abrasive sludge was used. Another line of research addressed the study of the possibility of reusing discharged wastewater. From this point of view, chemical analyzes were performed for two water samples on the basis of which it could be concluded that the recovered wastewater can be reused in the water supply installation of the abrasive water jet cutting machines. Based on the results obtained, it can be said that the resulting waste can be a raw material for the construction of building materials and can contribute to a considerable reduction in drinking water consumption. [ABSTRACT FROM AUTHOR]