In this research, an oil-water separation equipment was installed at a restaurant and the difference of the material and energy flow between before and after the installation of the oil-water separation equipment was analyzed. The results showed that the material input, except for food and oil, into the boundary condition of the material and energy flow per one meal was reduced using the oil-water separation equipment. The reduction of water consumption in the dishwashing machine was saved effectively from the total water consumption regardless of the consumption of the number of meals in the restaurant. CO2 emission was reduced by 39.5% using the material and energy balance for cooking and dishwashing after the installation of the oil-water separation equipment. The environmental impact of the n -hexane extract index was reduced by 88.8% after the installation of the oil-water separation equipment from the viewpoint of the gray water footprint. More than 54.5% of the oil removal rate was established from wastewater while the number of the meals was increased in the assessments.
In this study, an analysis was conducted for the determination of tefuryltrione in drinking water using liquid chromatography/tandem mass spectrometry (LC/MS/MS) .
The calibration curve of tefuryltrione, obtained from the results of the study, demonstrated good linearity in the range of 0.2-0.02µg/L. Repeatability of repeated measurements of tefuryltrione standard solution (0.02µg/L, n=5) was observed to be below 1.2%. In addition, the repeatability (1.8%) , intermediate precision (3.5%) , and accuracy (104%) values obtained via recovery tests for tefuryltrione in drinking water (0.02µg/L, n=5, 5days) satisfied the criteria provided in the guideline for validation of testing methods for drinking water notified by the Ministry of Health,Labour and Welfare, Japan.