Journal of Korean Society of Water and Wastewater 

About: Journal of Korean Society of Water and Wastewater is an academic journal published by Korean Society of Water and Wastewater (KSWW). The journal publishes majorly in the area(s): Wastewater & Water treatment. It has an ISSN identifier of 1225-7672. Over the lifetime, 781 publications have been published receiving 1156 citations. The journal is also known as: Sanghasudohakoeji & Journal of the Korean society of water and wastewater.

정수 및 폐수처리에서 오존 미세기포와 초미세기포 기술의 적용 : 리뷰

Abstract: Water and wastewater treatment has always been a challenging task due to the continuous increase in amount and the change in characteristics of the poorly biodegradable and highly colored organic matters, as well as harmful micro-organisms. Advanced techniques are therefore required to successfully remove these pollutants from water before reuse or discharge to receiving water bodies. Application of ozone, which is a powerful oxidant and disinfectant, alone or as part of advanced oxidation process depends on the complex kinetic reactions and the mass transfer of ozone involved. Micro- and nano bubbling considerably improves gas dissolution compared to conventional bubbles and hence mass transfer. It can also intensify generation of hydroxyl radical due to collapse of the bubbles, which in turn facilitates oxidation reaction under both alkaline as well as acidic conditions. This review gives the overview of application of micro- and nano bubble ozonation for purification of water and wastewater. The drawbacks of previously considered techniques and the application of the hydrodynamic ozonation to synthetic aqueous solutions and various industrial wastewaters are systematically reviewed.

Assessment of Residual Tensile Strength on Cast Iron Pipes

Abstract: Criteria for rehabilitation priority are an important factor in planning the improvement of water supply systems. In this study, deteriorations of water pipes are discussed to evaluate structural stability of deteriorated cast iron transport and transmission pipes. For the purposes, safety factor is introduced and estimated by measuring tensile strength and analyzing stress caused by the internal-external loads working on buried pipe body. Prediction models of a residual tensile strength are presented using pit characteristics and fracture toughness. Related information is surveyed and collected in the fields up the pipe by digging and assessing its structural stability. The collected data is analyzed to evaluate the deterioration degree of the pipes including corrosion and pitting characteristics, fracture toughness, installation environment and water qualities etc. Assessment models developed in this study showed a little correlation for measured residual tensile strength. The results will very help water utilities to manage water pipes in the aspect of rehabilitation and assessment of structural safety.