The mother machine makes the necessary shape by processing materials such as metal. The SCFs are applied to the processing surface when the mother machine processes the material, thereby improving the cutting conditions. SCFs contain high concentrations of organic components and nitrogen compounds, which can cause problems such as eutrophication and algae bloom. Therefore, proper treatment is required. Electrochemical treatment is expected to be an alternative to conventional processes, and to be useful in various wastewater treatments. Moreover, it is an efficient elimination technique for contaminants and has a simple equipment composition. In this study, the removal efficiency of the T-N contained in the waste SCF using electrochemical treatment is analyzed. The electrode was made of titanium and iridium, made into a perforated metal sheet to prevent an imbalance of the sample concentration in the reactor. Experiments were conducted to examine the effects of current density and the concentration of the supporting electrolyte (NaCl, Na2SO4) on removal efficiency. In the cases with 60 A/m2, 80 A/m2, and 100 A/m2 current densities, the removal efficiencies of the T-N contained in the waste SCF were 51.03%, 68.83%, and 79.58%. Comparing between the addition and non-addition of NaCl, the removal efficiency with the addition of NaCl (5 ~ 10 mM) was higher than for no addition at 60 min for all current densities. The addition of Na2SO4 increased the removal rate of the T-N, but it was less effective than NaCl addition.

The use of Soluble Cutting Fluids (SCF) is essential in the development of industrial technology. However, it is difficult to decompose biologically due to its high concentrations of organic substances and nitrogen compounds, which interfere with microbial growth. Recently, Advanced Oxidation Processes are being studied both domestically and internationally. Electrolysis is highly adaptable industrial wastewater treatment because it has high removal efficiency and short processing time, regardless of the contaminant’s biodegradable nature. Accordingly, this study shows the characteristics of total nitrogen removal in SCF on the operating time, current density, and electrolytes when using aluminum in a batch-type reactor. The results are as follows: ① Under the condition of without the electrolyte when the current density was adjusted to 40 A/m2, 60 A/m2, or 80 A/m2, the respective T-N removal efficiencies were 71.7%, 80.6%, and 87.2% at 60 min. ② In the comparison for the condition of whether NaCl was added, the removal efficiency of adding NaCl (5 ~ 10 mM) was higher than non-addition at 60 min for all current densities. ③ In the comparison for the condition of whether Na2SO4 (5 ~ 10 mM) was added, the removal efficiency when adding Na2SO4 showed no significant difference compared to non-addition at 60 min for all current densities.

This study of the electrolysis reaction fillers and electrolytic treatment sludge generated by checking the status and properties of the sludge before and after electrolysis filler caused by a reaction to examine the water-soluble cutting oil sludge and organic matter removal mechanism of filling in the packed bed bipolar electrolytic reactor was to identify the characteristics. Delivery was analyzed using a SEM (scanning electron microscope) recording method for the filling material in the GAC surface characterization of the packed bed bipolar electrolytic reactor to look at the reaction of the waste water generated by the electrolytic removal reaction. Sludge generated in order to analyze the properties of XRD(x-ray diffraction) was analyzed using the device. The video of the GAC surface before and after the reaction was taken by SEM, it can be known indirectly the change between the voids in the GAC in figure before and after. Prior to the electrolytic treatment can be seen that there is some contamination between the pores, but it can be seen that after the treatment, rather than clean the pores of the GAC. This photograph of the surface after the electrolytic treatment, GAC is decomposed organic material adsorbed on the surface by dissolution of ions at the anode acting on bipolar electrolytic, it is corroded, it is possible to observe what happens. It was found to form iron oxide when analyzing the electrolytic sludge using XRD. Properties of the sludge generated after electrolysis, was composed primarily of oxygen and iron. These results wastewater treatment by filling in the electrolytic cell is that it indirectly proves to occur by electrolysis removal, it is considered to be able to demonstrate the deletion mechanism indirectly.

This study, changes in raw water quality is to indicate on the efficiency of ozone treatment of each pollutant as compared to derive the appropriate operating measures. The appropriate selection for injection rate of pre-ozone and did not inject pre-ozone assess changes in the water. When good water quality, you not injected of pre-ozone to evaluate the economic efficiency of electricity and put the most cost-effective ozone concentration were evaluated. Evaluation remove organic matter and chlorophyll-a concentration level in experiments with each factor of the water DOC> 2.5 ㎎ / L, THMFP> 70 ㎍ / L, Chl-a> 30 ㎎/ ㎥or less constant process, if you do not need to put pre-ozone showed little impact. It also does not put you in pre-ozone appropriate produce enough power rate savings was calculated as approximately 90 million won. Ability to remove organic materials and the ability to produce disinfection byproducts, and cost-effective decisions by considering the concentration of injection if pre-ozone 1 mg/L was investigated by the appropriate concentration of ozone injection.

This is made of domestic and foreign coal activated carbon of five species, physicochemical adsorption efficient about sterilize products and micro harmful substances and is a result of the economic evaluation. The most well-developed micropores bed volume 123,409 of AC-1 activate carbon appeared to be the best next AC-2, AC-3, AC-4, AC-5 followed by activated carbon was investigated. PFOA and PFOS in the BV 96,000 when evaluating foreign types of adsorption activated carbon adsorption capacity was greater when more than PFOA, PFOS showed that the adsorption well. The economic evaluation of activated carbon usage in chloroform (CUR) was most excellent as a AC-1 4.3 g/day, the next AC-2, AC-3, AC-4, AC-5 there are two types of foreign economic order appears to have appeared, but the current domestic market when applying the price AC-1, AC-3, AC-2, AC-4, AC-5 order was investigated.