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In 2017, the Minamata Convention on Mercury came into effect, but mercury pollution is spreading on a global scale. The Ministry of the Environment recommends the sulfide method for mercury treatment. Since the concentration of mercury wastewater changes rapidly near the equivalent of the sulfide agent added, an accurate addition method is crucial. The NS method can control automatic addition accurately and can treat within water quality regulatory values. Additionally, a chelating resin tower has been established to enhance safety. 【Features】 ■ Can control automatic addition accurately ■ Can treat within water quality regulatory values ■ Safety is enhanced by the establishment of a chelating resin tower *For more details, please refer to the PDF document or feel free to contact us.

• Wastewater/wastewater treatment equipment

The "NS method" is a new sulfide method using gas sensor control. It enables advanced processing that can reduce residual metal concentrations to extremely low levels. The influence of complexing agents such as ammonia and organic acids is minimal, and the addition of ferrous salts and PAC is unnecessary. We have a proven track record in both batch and continuous production scales. For more details, please contact us. 【Features】 ■ Thorough safety measures ■ Reduction of sludge generation (moisture content: 20-50%, sludge amount: less than half of conventional methods) ■ Advanced processing capability (reducing residual metal concentrations to extremely low levels) ■ Minimal influence from complexing agents such as ammonia and organic acids; no need for ferrous salts and PAC ■ Capable of separating and recovering different metals *For more details, please refer to the PDF materials or feel free to contact us.

• Wastewater/wastewater treatment equipment

This document introduces the "NS method," a technology for recovering useful metals from metal sludge and wastewater, as well as reducing sludge. It includes background, objectives, an overview of the project, results (separation and recovery of useful metals from metal-containing sludge and wastewater), energy-saving effects, and future prospects. Additionally, this method has received an Excellence Award in an environmental award. [Contents (partial)] ■ Technology for recovering useful metals from metal sludge and wastewater and reducing sludge ■ Appropriate treatment and recycling technology for industrial wastewater, etc. (Malaysia) ■ Demonstration project of the NEDO system in Malaysia *For more details, please refer to the PDF document or feel free to contact us.

• Hazardous material processing
• Other environmental equipment

Continuous measurement of ammonia in liquid has been made possible by sensing with a gas sensor. It is possible to optimally control the addition of hypochlorous acid during discontinuous point chlorine treatment. Additionally, it can be applied to uses related to ammonia in aqueous solutions, such as controlling the Anammox reaction.

• Other environmental equipment

When performing nitrogen treatment using microorganisms, the addition of methanol is necessary in the denitrification process. However, in conventional technology, methanol is added based on the maximum concentration of nitrate ions in the influent, resulting in unnecessary costs. The methanol monitor can detect the methanol after the reaction using a gas sensor and automatically add the optimal amount of methanol.

• Other environmental equipment

The sulfide method for treating heavy metal wastewater has superior sediment characteristics compared to the hydroxide method. However, the generation of hydrogen sulfide gas has traditionally made it less favored. However, by using an NS gas monitor, it is possible to prevent the generation of hydrogen sulfide and colloid formation due to polysulfide production.

• Other environmental equipment

We recover free acids from acidic waste liquids using our unique control system and acid retardation method. Metal salts are separated by precipitation using the NS process, and valuable metals are recovered. Additionally, nitrogen derived from nitric acid is decomposed using microbial treatment with sensor technology.

• Other environmental equipment