住友金属鉱山エンジニアリング List of Products and Services

The "Free Series" is a self-developed chemical treatment process that improves the issues of conventional methods for the treatment of nitrogen, COD, fluoride, etc., aimed at water recovery, recycling, and regulatory compliance. It can be applied to wastewater from various processes such as metal pickling, metal chemical products, semiconductor manufacturing processes, plating processes, catalyst manufacturing processes, and precious metal manufacturing processes. We propose appropriate solutions by combining the distinctive elemental technologies of the "Free Series" with metal separation and purification technology. 【Elemental Technologies】 ■ Nitrate Nitrogen Treatment N-Free N ■ Ammoniacal Nitrogen/COD Treatment N-Free A ■ Fluoride Treatment F-Free ■ Boron Fluoride Treatment B-Free F ■ Nitrate/Ammonia Electrolytic Treatment N-Free AN ■ Heavy Metal Treatment, etc. *For more details, please download the PDF or feel free to contact us.

Our company conducts nitrate nitrogen treatment that can handle wastewater that cannot be processed by biological methods. Wastewater that cannot be treated by biological methods can also be addressed. No dilution is required, and due to the high reaction speed, it is space-saving, and secondary waste (such as sludge) is not generated. 【Application Cases / Consideration Cases (Excerpt)】 ■ Acid washing wastewater treatment ■ Scrubber wastewater treatment ■ Semiconductor material cleaning wastewater treatment ■ Combined treatment with acid recovery ■ Nuclear-related facility wastewater treatment *For more details, please refer to the PDF document or feel free to contact us.

Our company treats ammonia nitrogen and COD components using this device (electrolytic device) for harmless processing. For ammonia, it reacts with hypochlorous acid generated at the anode and is oxidized to nitrogen gas. Since hypochlorous acid is generated within this device, there is a cost advantage compared to purchasing it. 【Advantages】 ■ Capable of handling wastewater that cannot be treated by biological methods - No restrictions on raw water nitrogen concentration (can treat high concentrations as they are) - Can accommodate fluctuations in raw water nitrogen concentration ■ No dilution required, and due to high reaction speed, it saves space ■ No secondary waste (such as sludge) is generated ■ Can operate only when treatment is needed (continuous operation is not required) *For more details, please refer to the PDF document or feel free to contact us.

Our company conducts primary treatment through biological treatment methods or coagulation and sedimentation after necessary pretreatment for high concentration and high load COD processing, followed by chemical oxidation treatment on the effluent. We reduce the pollution load within the range that can be treated by biological treatment, which has low running costs, thereby controlling the total running costs. In cases where it is possible to generate poorly soluble organic substances, coagulation and sedimentation may be used instead of biological treatment. 【Features】 ■ Chemical treatment is performed in the later stage to reduce COD concentration to meet discharge standards. ■ Finishing is done with chemical treatment, which is expected to provide stable operation compared to biological treatment. ■ Suitable for wastewater that is difficult to meet discharge standards with biological treatment alone or wastewater that does not operate stably with biological treatment. ■ In the event of temporary trouble with biological treatment, treatment is carried out solely with chemical treatment to cover until the biological treatment is restored. *For more details, please refer to the PDF materials or feel free to contact us.

Our company incorporates an ammonia stripping process to reduce the presence ratio of ammonia nitrogen, selectively removing ammonia through anaerobic digestion liquid treatment. To introduce ammonia stripping, we first separate suspended solids (SS) to prevent clogging in the ammonia stripping process and to remove solid COD components, thereby reducing COD load. The COD components remaining after ammonia stripping are treated by combining biological and chemical processes. 【Features】 ■ By incorporating ammonia stripping, the C/N ratio is improved. ■ Since the nitrogen concentration is reduced at the ammonia stripping outlet, the risk of nitrate accumulation in subsequent treatment is low. *For more details, please refer to the PDF document or feel free to contact us.

Our company conducts fluoride treatment based on a method that involves adding calcium salts to precipitate and remove fluoride as calcium fluoride. After the removal of calcium fluoride, a defluorinating agent is added to the supernatant to generate calcium precipitation, which adsorbs and removes fluoride. The generated calcium precipitate is reused as a calcium source in the process of precipitating calcium fluoride. Therefore, sludge from additives does not occur. 【Features】 ■ The treated liquid contains almost no calcium. ■ No precipitates other than calcium fluoride are generated. ■ Existing equipment can be repurposed. *For more details, please refer to the PDF document or feel free to contact us.

Our company measures BF4 concentration in real-time and optimizes the amount of BF4 decomposing agent based on the measured values. In the case of batch reactions, the reaction time is approximately within 30 minutes. It can treat BF4- up to 10 mg/L, minimizing the usage of the BF4 decomposing agent. 【Features】 ■ In the case of batch reactions, the reaction time is approximately within 30 minutes ■ Can treat BF4- up to 10 mg/L ■ Minimizes the usage of the BF4 decomposing agent *For more details, please refer to the PDF materials or feel free to contact us.

This is a high-performance wastewater treatment device that adds a nitrate reduction function to the cathode side based on the conventional "N-FreeA system." In this system, nitrate ions (NO₃⁻) in the wastewater are first electrochemically reduced at the cathode and converted into ammonia (NH₃). Next, by reacting with hypochlorous acid (HOCl) generated at the anode, the ammonia is oxidatively decomposed to nitrogen gas (N₂). This process allows for the efficient simultaneous removal of nitrate nitrogen and ammonia nitrogen from the wastewater. Additionally, even if ammonia is already present in the raw water, both nitrate and ammonia can be treated simultaneously, enabling the safe and reliable removal of multiple nitrogen compounds in one go. 【Features】 - Capable of handling wastewater that cannot be treated by biological methods. - No dilution is required, and the high reaction speed allows for space-saving. - No secondary waste (such as sludge) is generated. - Can operate only when treatment is needed (continuous operation is not necessary). - There is no need to treat ammonia and nitrate separately. - Particularly suitable for treating wastewater with high salt concentrations (high electrical conductivity). *For more details, please refer to the PDF document or feel free to contact us.*

Our company conducts the treatment of heavy metals and other substances based on non-ferrous metal smelting technology. We propose treatment methods tailored to individual wastewater circumstances, such as coexisting substances and required water quality. The target components include heavy metals, light metals, precious metals, metalloids, and semiconductors. 【Target Components (Partial)】 ■ Alkaline earth metals (Ca, Mg, etc.) ■ Rare earth elements ■ Cyanides ■ Organic matter (COD) ■ Oxidizers/reducers (hydrogen peroxide H2O2, residual chlorine, etc.) *For more details, please refer to the PDF materials or feel free to contact us.

This system is a wastewater treatment solution that combines multiple optimized treatment processes to efficiently remove harmful substances such as fluoride and ammonia contained in wastewater. Our wastewater treatment system reliably removes various harmful substances, ensuring safe and secure wastewater discharge. We also offer customized designs tailored to your needs, as well as on-site surveys and technical support, so please feel free to consult with us.