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What is the reuse of factory wastewater? Necessary water quality by application [Basic Knowledge]

Reusing wastewater that has been treated for use again in the factory. The level of cleanliness depends on the intended use. This explains the concept of water quality standards.

The reuse of factory wastewater refers to the process of treating water that has been used once in a factory and using it again in production processes. Overall, the recycling and reuse of once-used water is progressing in industrial water usage. In facilities with more than 30 employees, the freshwater usage in 2013 was approximately 46.2 billion cubic meters, and the newly sourced freshwater supply was about 9.7 billion cubic meters. The recovery rate of industrial water is 79.1%. The recovered water, according to statistics, refers to all water that is circulated and used within the facility, not just the water that is treated from wastewater. ■ Are there differences by industry? The recovery rate varies significantly by industry. The chemical and steel industries maintain high recovery rates of around 80-90%, while the pulp, paper, and paper processing industries have seen rates of about 40% in recent years. Regionally, areas such as the Kanto coastal region, Kinki coastal region, Sanyo, and Kitakyushu have recovery rates exceeding 80%. ■ Why has reuse progressed? The recovery rate has increased due to the necessity of using water efficiently and complying with wastewater regulations. In addition to reducing the amount of water drawn from rivers and underground sources, the ability to decrease the volume of wastewater discharged is an advantage of reuse. Please feel free to consult with us first.