コーワ商事 List of Products and Services

We introduce examples of wastewater treatment facilities, coagulation and sedimentation equipment for chemical plants, nitrification and denitrification facilities, and wastewater treatment projects for food processing companies, metal processing factories, and food processing plants using the 'Bio-RESE System.' 【Case Studies - Excerpt from Catalog】 ■ Wastewater Treatment Facility Project for Metal Processing Factory <BIO-RESE Installation> - Location: Osaka Prefecture - Wastewater Components: Oil-containing (mainly mineral oil) - Treatment Method: Custom-made microbial treatment Using mineral oil-decomposing bacteria to break down mineral oil, which has been considered difficult to decompose - Treatment Capacity: 150 m³/day *For more details, please refer to the PDF document or feel free to contact us.

At Kowa Shoji, we handle the "Vacuum Dehydration Drying Device" that purifies waste liquid through dehydration and drying. This device separates moisture from concentrated waste liquids and high-water-content sludge using a vacuum distillation method, contributing to the reduction of industrial waste volume and the reuse of wastewater. The drive unit is maintenance-free with only a pump, and pre-adjustment of the treated sludge is unnecessary, allowing for automatic operation in both "batch" and "continuous" modes. Additionally, by adding a weighing unit, the concentration ratio can be set arbitrarily, improving efficiency. 【Features】 ■ Automatic operation in both "batch" and "continuous" modes ■ Maintenance-free drive unit with only a pump ■ Fully automatic operation with an automatic discharge mechanism for residual sludge ■ Possible moisture content of 1-5% in the processed cake ■ In batch operation, adjustment of moisture levels is possible *For more details, please refer to the PDF document or feel free to contact us.

"OUR-N" is a smart technology that monitors the nitrification reaction in SBR through oxygen utilization rate measurement. By continuously measuring the oxygen consumption rate of microorganisms in SBR (Sequencing Batch Reactor) facilities, it appropriately controls the on/off of the blower, reducing energy consumption during aeration by 30-40% compared to conventional methods. (Based on field test results at wastewater treatment plants) Utilizing the oxygen consumption rate of microorganisms, it enables monitoring of the endpoint of the nitrification reaction and control of the aeration on/off. [Features] ■ Continuous measurement of the oxygen consumption rate of microorganisms in SBR facilities ■ Appropriate control of the blower on/off ■ Reduction of energy consumption during aeration by 30-40% compared to conventional methods *For more details, please refer to the PDF materials or feel free to contact us.

At a food factory that produces frozen dumplings and gyudon ingredients, issues arose due to the deterioration of sludge sedimentation, leading to sludge overflow and odor problems. Complaints were received from nearby residents, and we were consulted on how to address the situation. Among various countermeasure proposals, we chose a method focused on oil removal and made our suggestions. (We also considered sludge reduction in our proposal.) We utilized a special oil-decomposing microorganism to treat the oil and suspended solids (SS). As a result, the sedimentation of the sludge improved, and the quality of the treated water increased. Complaints from nearby residents ceased entirely, and a sludge reduction rate of 77% was achieved. 【Case Study】 ■ Food Factory ■ Issues - Deterioration of sludge sedimentation leading to sludge overflow and odor generation - Large amounts of animal and vegetable oils mixed in, making treatment difficult *For more details, please refer to the PDF document or feel free to contact us.

There was a request from a plant manufacturer to treat the concentrated water that comes from the RO membrane treatment of leachate from a landfill. The requester had a plan to reuse the leachate treatment water from the landfill, but the salinity of the treated water was too high for reuse. Therefore, we proposed to treat the concentrated liquid, which accounts for 40% of the treated water discharged from the RO membrane, using a vacuum distillation unit called "Gen," to separate the concentrated liquid into distilled water and salt. As a result, the landfill, which had difficulty securing water in the mountains, was able to conserve valuable water resources and easily secure the necessary water volume through this method. [Case Study] ■ Request: To treat the concentrated water that comes from the RO membrane treatment of leachate from the landfill ■ Proposal: Proposed the vacuum distillation unit "Gen" ■ Implementation Effect: Valuable water resources were conserved, and securing the necessary water volume became easier. *For more details, please refer to the PDF document or feel free to contact us.

The seasoned plum waste liquid had high salt and BOD concentrations, leading to ongoing troubles and increasing costs. Additionally, the seasoned waste liquid was also strong acid waste, and processing it as industrial waste resulted in significantly high costs. At that time, the daily volume of waste liquid classified as industrial waste was 3m3, with a processing cost of ¥90,000 per day. Therefore, we proposed the "Bio-RESE" system using special microorganisms (halophiles) that can handle high-salt waste liquids. Without changing the capacity of the existing aeration tank, we repurposed the circulation tank from an overflow tank to establish the BJ system. As a result, we achieved a BOD decomposition of 450 kg per day. [Case Study] ■ Industry: Manufacturing of pickled plums, a local industry in Wakayama ■ Inquiry: Treatment of seasoned waste liquid *For more details, please refer to the PDF document or feel free to contact us.

The "Sun Purification Center Ume no Sato," designed by our company, is a facility specialized in the treatment of seasoning liquid generated during the production of pickled plums, a specialty product of Wakayama Prefecture. The high-salinity wastewater (up to 15% salt concentration) produced from the process of making seasoned pickled plums was previously disposed of as industrial waste outside the region. In response to the demand to "process the seasoning wastewater locally," it was decided to construct the facility in Ichinose, Kamitonda Town. The seasoning liquid collected from the pickled plum processing factory is adjusted to a pH suitable for microbial treatment, and organic matter is decomposed and removed using specialized microorganisms (halophilic bacteria). The microbial treatment process is repeated, and after removing fine debris, it is confirmed that the treated water meets the discharge standards before being released into the river. In the event of any abnormal readings, there are comprehensive measures in place to automatically halt the discharge into the river. [Case Study] ■ Proposal - Introduction of custom-made microorganisms that efficiently decompose even at high salt concentrations. ■ Implementation Effect - The concentration of organic matter in the treated water was significantly reduced below the discharge standards. *For more details, please refer to the PDF document or feel free to contact us.

A feed manufacturing company that uses waste oil (such as vegetable oil and fish oil) as raw material requested to increase the dissolved oxygen (DO) in the biological treatment tank without changing the airflow of the blower. The issue at this company's treatment facility is that fluctuations in the characteristics of the wastewater lead to variations in the load on the biological treatment process. Therefore, we proposed upgrading to a master diffuser, which has a higher oxygen transfer efficiency than the existing disc-type diffuser. To increase the DO without changing the existing aeration airflow (9.7 m³/min), it is necessary to enhance the oxygen transfer efficiency, which is why we switched from the current disc-type diffuser to the master diffuser (MD). The MD can produce fine bubbles with high oxygen transfer efficiency at a lower energy cost. [Case Study] - Feed manufacturing company using waste oil (such as vegetable oil and fish oil) - Request: Increase the DO in the biological treatment tank without changing the blower's airflow - Proposal: Master diffuser with higher oxygen transfer efficiency than the disc-type diffuser *For more details, please refer to the PDF document or feel free to contact us.

Kowa Shoji is engaged in the proposal business for water treatment equipment and odor treatment equipment. As the export of waste plastics to overseas becomes stricter, the construction of processing plants in Japan is progressing rapidly. Last year, our company received orders from two companies for recycling plants for business-related PET bottles. Since an alkaline chemical solution is used during the cleaning process, the wastewater becomes strongly alkaline. Both companies are located in regions with very strict discharge standards for rivers and marine areas, which is why we proposed a treatment method that complies with the discharge standards of the rivers. 【Treatment Method】 Pressurized flotation treatment → Fluid carrier → Membrane separation → Discharge (partially reused) → Sedimentation → Dewatering → Industrial waste disposal 【Implementation Effects】 ■ 50% of the daily discharge water volume is reused Company U: 480 m³ → 240 m³ Company T: 720 m³ → 360 m³ The volume of industrial waste was reduced by concentrating the wastewater and applying dewatering treatment. *For more details, please refer to the PDF document or feel free to contact us.

The "Sun Purification Center Ume no Sato" is a facility specializing in the treatment of seasoning liquid generated during the production of pickled plums, a specialty product of Wakayama Prefecture. The high-salinity wastewater (up to 15% salt concentration) produced during the production process of seasoned pickled plums was previously disposed of as industrial waste outside the region. The facility was established in response to the desire to "process this seasoning wastewater locally." The seasoning liquid collected from the pickled plum processing factory is adjusted to a pH suitable for microbial treatment, and organic matter is decomposed and removed through treatment with specialized microorganisms (halophilic bacteria). The microbial treatment process is repeated, and after removing fine debris, it is confirmed that the water meets discharge standards before being released into rivers. In the event of any abnormal readings, there is a fail-safe measure in place that automatically halts the discharge into the river. [Case Study] ■ Proposal Introduction of custom-made microorganisms that efficiently decompose even at high salt concentrations. ■ Implementation Effect The organic matter concentration of the treated water was significantly reduced below discharge standards, resulting in a reduction of approximately 43% in the treatment costs of the seasoning wastewater, leading to cost savings.