Cutting fluid wastewater treatment method

Abstract

The invention provides a treatment method for cutting fluid wastewater, which includes the following steps: (1) adding concentrated sulfuric acid to the cutting fluid wastewater, stirring while adding, adjusting the pH, standing for stratification, and removing the lower layer of wastewater; (2) adding Sodium hydroxide was used to adjust the pH value to 7; (3) Add polystyrene latex microspheres and activated carbon fibers, and oscillate ultrasonically; (4) Add Acantescetes powder, needle-shaped fiber algae powder and citrus residue, heat and stir, and filter , remove the filter residue; (5) Add D3520 macroporous adsorption resin, carbon molecular sieve and D314 macroporous weakly basic anion resin to stir, filter, and remove the filter residue; (6) Pass the treated wastewater through a hydraulic device equipped with a ceramic membrane; ( 7) Determination of various physical and chemical indicators of the treated wastewater. The method for treating cutting fluid waste water of the present invention has good removal effect on COD, high adsorption rate on heavy metal ions and nitrogen and phosphorus, and has good adsorption effect.

Description

technical field [0001] The invention relates to a treatment method for cutting fluid waste water. Background technique [0002] Metal and its alloys usually use a kind of lubricating oil in the process of cutting, forming, grinding, etc., to cool and lubricate the cutting tool and workpiece. This liquid is called cutting fluid. When using metal cutting fluid, some impurities will be generated more or less, which may be metal particles caused by tool wear, or some dust, waste oil, etc. Cutting fluid, also known as coolant, has many types and different functions. They are generally formulated with water, surfactants and some additives. After the cutting fluid is used, the number of bacteria will continue to increase, and the performance will continue to decrease, so it is essential to replace it regularly. If the unusable cutting fluid is not replaced for a long time, the ultimate goal will not be achieved, and the effect of the processed workpiece will not be very good, so ...

AI Technical Summary

Problems solved by technology

For these additives, it is basically impossible to completely degrade them in a short period of time. These substances that cannot be degraded in a short period of time will eventually be completely absorbed by aquatic organisms. Pathological changes will occur in tissues and organs. It can be seen that aquatic organisms containing these harmful substances endanger human health.