Creation of pleasant water environment by ozone usage in sewage and industrial wastewater

摘要

This paper summarizes the present state and prospect of ozone usage in sewage and industrial wastewater for the creation of a pleasant water environment.The development of some technologies is needed to advance ozone usage in sewage and industrial wastewater: an effective usage of biological treatability induced by ozonation, an advanced degradation of organic compounds by combined use of ozone and other physico-chemical treatment methods, and the establishment of an optimum ozone generation and utilization system. At present, ozone usage in sewage and industrial wastewater remains mostly in the laboratories or pilot-scale examinations. However, the solution of the above three technical items will result in the advance in re-usage of treated water, the newly development of water source in urban areas and applications to environmental purification technologies as well as further usage in sewage and industrial wastewater. Ozone usage in these fields is expected to bring about a big demand of 0.14 approx 0.15 million tons per year in the future. The research and development in both effective generation and long-term preservation technologies as well as widespread usage will lead to the creation of a pleasant water environment.