Removal of volatile organic compounds, free carbon dioxide, and bicarbonate ions.
A joint research project between the Tokyo Metropolitan Waterworks Bureau and Nagao has developed a technology to remove volatile organic compounds (VOCs) in groundwater, such as trichloroethylene and benzene, to one-tenth of the drinking water standard. This device enables energy-efficient and space-saving treatment compared to conventional technologies and is suitable for low-concentration VOCs. Furthermore, it can also remove free carbon dioxide through a similar mechanism. (By combining pH adjustment, it is also possible to remove bicarbonate ions.) 【Features of AirSys】 * Energy-efficient * Space-saving * Easy maintenance * Environmentally friendly * Simple treatment equipment
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basic information
Its performance achieves over 99% removal of VOCs, and it also meets the challenging low concentration VOC standard exceeding the water quality standards of the Water Supply Act, reaching 0.001 mg/L (one-tenth of the Water Supply Act standard). Additionally, it has realized a 60% reduction in the amount of energy required for operation (based on our verification results).
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Applications/Examples of results
■Target Substances Volatile Organic Compounds (VOCs) Tetrachloroethylene Trichloroethylene Cis-1,2-Dichloroethylene Benzene Free Carbonic Acid Bicarbonate Ion (pH adjustment required) ■Applications/Results - Drinking Water / Y Town, Kyoto Prefecture 60 m3/h Free Carbonic Acid 60 mg/L → below 20 mg/L, soundproof specifications - Soil Contamination Countermeasures / Certain Location 1.2 m3/h After oil-water separation, over 96% removal of benzene using air system - Agricultural Water / Tomato Hydroponic Cultivation Facility 200 m3/h Bicarbonate Ion 110 mg/L → below 50 mg/L - In-house Demonstration Experiment Trichloroethylene 0.08 mg/L → 0.001 mg/L
Company information
Nagaoka Corporation introduces various "Nagaoka Screens" that enable simple and economical water extraction in many developing countries and regions where securing domestic water is a challenge, providing water treatment facilities that supply safe and sustainable water quality suitable for drinking. In the energy sector, our "Internal" process equipment contributes to CO2 reduction effects in oil refining and petrochemical industries, aiding in the provision of clean energy.
