西戸崎興産 List of Products and Services

Our company primarily handles activated carbon made from plant-based and coal-based raw materials, which are subjected to carbonization and activation processes. This activated carbon, known for its excellent adsorption capacity, is utilized in various fields. We can provide activated carbon tailored to your specific applications, so please feel free to contact us. 【Product Lineup】 ■ Liquid-phase activated carbon: for water purification, wastewater treatment, etc. ■ Gas-phase activated carbon: for air purification, deodorization, dioxin removal, etc. ■ Others: for catalyst use, etc. *For more details, please download the PDF or feel free to contact us.

• Filtration Equipment

Our company offers "Manganese Sand," which is a special coating of oxidants such as manganese dioxide on the surface of filter sand. It is a filtration material used for the removal of iron and manganese from raw water that has chlorine injected into it. Manganese sand acts as a catalyst to oxidize and remove manganese from the raw water. Furthermore, as long as chlorine is present in the raw water (0.7 mg/L or more is desirable), the contact oxidation power remains unchanged. 【Water Quality Standards】 ■ Iron: 0.3 mg/L or less ■ Manganese: 0.05 mg/L or less *For more details, please download the PDF or feel free to contact us.

• Filtration Equipment

We would like to introduce the "Main Delivery and Construction Achievements" of Nishitozaki Kousan Co., Ltd. We have numerous delivery and construction achievements across the country, including the Waterworks Bureau, regional water supply corporations in the prefecture, and water purification plants. If you are considering our services, please feel free to consult with us. 【Delivery and Construction Achievements (Excerpt)】 <Tokyo> ■ Tokyo Waterworks Bureau - Misato Water Purification Plant ■ Tokyo Waterworks Bureau - Higashimurayama Water Purification Plant <Kanagawa Prefecture> ■ Yokohama City Waterworks Bureau - Kozutsuki Water Purification Plant ■ Kanagawa Prefectural Regional Water Supply Corporation - Nishinagasawa Water Purification Plant *For more details, please refer to the PDF document or feel free to contact us.

• others

The "Auto Flow ECO System" is a constant flow device that cuts unnecessary water usage and ensures an appropriate flow rate. The discharge flow rate is almost constant. By selecting an auto flow that matches the appropriate flow rate for each application, you can eliminate wasted water. Therefore, we offer over 290 types of products to accommodate any application or flow rate. 【Features】 ■ Proven track record of over 3,500 locations and hundreds of thousands of units ■ Water savings rate of 10-30% with implementation (cost recovery in 1-3 years) ■ Cuts unnecessary water with auto flows prepared for each water supply faucet ■ Maintains a constant discharge flow rate regardless of pressure fluctuations ■ Difference from water-saving nozzles *For more details, please refer to the PDF document or feel free to contact us.

• Other water treatment equipment

Our company conducts cleaning and inspection of water distribution reservoirs and water purification tanks using "underwater cleaning robots." Previously, internal inspections and bottom cleaning of water distribution reservoirs and water purification tanks could only be done by either draining the water or using divers. Draining the water results in wasting precious drinking water and involves dangerous work (such as the risk of oxygen deficiency) within the tanks. Additionally, work performed by divers poses hygiene concerns and risks, as humans enter the drinking water. To eliminate these dangers, our company performs cleaning operations using robotic technology, ensuring safety in our approach. 【Features】 - Cleaning can be performed while maintaining normal water supply without draining the water from the distribution reservoirs or purification tanks. - Inspections of the interiors of distribution reservoirs and purification tanks, which are usually inaccessible, can be conducted, and the conditions can be documented with images. - There is no need for the time and cost associated with draining water for cleaning or inspection, nor for refilling the tanks afterward. - Cleaning and inspections can be carried out without personnel entering the interiors of the distribution reservoirs or purification tanks, ensuring safety from a hygiene perspective and reducing the risks associated with the work. *For more details, please refer to the PDF document or feel free to contact us.*

• Water quality testing
• Contract Inspection

At Nishitazaki Kousan Co., Ltd., we conduct comprehensive diagnostics of filtration ponds. If the condition of the filtration layer is left unaddressed, it can affect the quality of the filtered water and accelerate the contamination of the filtration layer, necessitating a complete replacement of the filtration media (layer renewal) in a short period. Therefore, it is essential to conduct regular inspections of the filtration layer and, if abnormalities are found, to immediately take appropriate measures such as improving cleaning methods or replenishing sand. [Filtration Pond Inspection (Excerpt)] ■ Contamination status of filtration sand and gravel, measurement of expansion rate during backwashing ■ Contamination status of the lower collection device ■ Clogging of surface wash nozzles, cleaning efficiency ■ Contamination status of the pressure chamber and its interior *For more details, please refer to the PDF document or feel free to contact us.

• Soil testing
• Contract Inspection

Nishitozaki Kousan Co., Ltd. is engaged in the environmental maintenance and preservation of various water purification facilities. Water treatment facilities must conduct regular inspections and cleaning to supply water safely, securely, and stably. Additionally, work within the filtration ponds requires utmost care and advanced skills. Our company is highly trusted for carrying out "slow filtration pond construction" and "rapid filtration pond construction." [Overview of Filtration Pond Rehabilitation Work] ■ Preliminary survey (conducting a comprehensive diagnosis of the filtration pond) ■ Slow filtration pond construction (inspection and maintenance) ■ Rapid filtration pond construction (inspection and maintenance) ■ Filtration pond recycling rehabilitation work (inspection and maintenance) *For more details, please refer to the PDF materials or feel free to contact us.

• Other contract services
• others

The issue of reducing industrial waste has become a significant problem not only domestically but also globally. Our company is a member of the Filter Material Recycling Promotion Association and is committed to reducing industrial waste. If you are a customer who is concerned about "wanting to carry out filter material replacement work, but is hesitant to generate industrial waste," please leave it to us. Used filter materials will be purchased as valuable by-products and effectively utilized in various fields. 【Features】 ■ Conduct 26 soil tests before acceptance ■ Transport filter materials from filtration ponds and filtration machines using blower trucks, etc. ■ Revive into various raw materials through a recycling plant ■ Utilized for various purposes such as rooftop greening, schoolyard greening (gardens), and golf courses *For more details, please refer to the PDF materials or feel free to contact us.

• Other contract services
• others

"Gravel" makes it difficult for weeds to grow when spread around the house and is also a suitable product for landscaping. It can be applied for garden decoration, gardening, horticulture, security, and more. It makes noise when walked on, which can also help with security. In addition, our company offers "construction sand," which has no salt and good particle shape, making it suitable for mortar production, as well as "gravel for drainage wells" and "gravel for drainage management." [Features] - Creates a soft and calm atmosphere in the garden - Suitable for traditional Japanese-style detached houses - Expands the possibilities for gardening - Makes it difficult for weeds to grow when spread around the house - Makes noise when walked on, which can help with security *For more details, please refer to the PDF materials or feel free to contact us.

• others

Our company offers a wide range of products that meet various needs based on many years of experience in fields such as sports facilities, water and sewage treatment facilities, and incineration facilities. "Silica sand" is a product with a production capacity of 3,000 tons per month. We respond quickly with a rich inventory that meets customer needs. In addition, we have been manufacturing and selling "top dressing for artificial turf" for indoor sports arenas, tennis courts, soccer fields, and more for many years. Based on this track record, we are also well-loved in various fields. 【Features】 - A wide variety of products available for different applications - Production capacity boasts 3,000 tons per month - Ample inventory allows for sufficient response - Available in 20kg (small bags), 500kg, and 1000kg options *For more details, please refer to the PDF document or feel free to contact us.

• others

At Nishitazaki Kousan Co., Ltd., we offer a variety of high-quality sand essential for making golf courses more beautiful and comfortable. Our "Calcined Topdressing Sand" is produced through processes including washing, particle size adjustment, and high-temperature treatment, ensuring a sterile condition. Compared to wet products, the application thickness can be freely adjusted, guaranteeing a significant increase in work efficiency. In addition to this, we also provide "Topdressing Sand," "Bunker Sand," and "Green Floor Sand." 【Features】 ■ Ideal for greens and tee grounds ■ A variety of sterile options available ■ Application thickness can be freely adjusted compared to wet products ■ Significant increase in work efficiency *For more details, please refer to the PDF document or feel free to contact us.

• others

Nishitazaki Kousan Co., Ltd. handles "perforated bricks." These bricks are used for slow filtration ponds and sun-drying pond water collection systems, and they exhibit superior durability and strength compared to ordinary bricks due to high-temperature firing. Additionally, their rectangular perforated shape contributes to uniform filtration across the entire surface of the filtration pond and helps prevent clogging of the filter material. 【Specifications】 ■ Dimensions (mm): 240mm × 100mm × 60mm ± 5mm ■ Compressive strength (N/mm²): 30 N/mm² or more ■ Water absorption rate (%): 10.0 or less ■ Weight (kg): 2.4 kg ■ Hole dimensions (mm): (9×27) 24 pieces *For more details, please refer to the PDF document or feel free to contact us.

• Filtration Equipment
• Other water treatment equipment

"Anthracite" is a filtration material that is selected, crushed, and sieved from high-quality coal known as smokeless coal, achieving a particle size distribution suitable for filtration. It has a characteristic density of about half that of sand, which means that even during backwashing, it does not mix with sand due to the difference in density. As a result, it is widely used as a filtration material for multilayer filtration, laid on top of filtration sand in water purification plants, pools, and other filtration tanks across the country. In addition, our company also handles "Manganese Sand," which has a special coating of oxidizing agents such as manganese dioxide on its surface. 【Features】 - Crushed smokeless coal with adjusted particle size - Effectively retains difficult-to-remove substances such as algae in raw water - Allows for high-speed filtration with a long filtration duration - Due to its low density, surface cleaning and backwashing can be done with a smaller volume of cleaning water - Composed of carbon, making it resistant to acids and alkalis *For more details, please refer to the PDF document or feel free to contact us.

• Filtration Equipment
• Other water treatment equipment

"Filter gravel" is the support bed for filtering materials. Especially in rapid filtration, a shape close to spherical is required for the flow rectification effect during backwashing. Our company classifies this product, which has been carefully washed, according to the sizes requested by our customers. We also offer gravel for collection buried pipes, sun-dried gravel, and upward flow gravel. [Features] - The shape is hard and rounded. - Contains few flat items, impurities, clay, or fragile particles. - Washing turbidity is below 30 degrees. - Density in a surface-dry saturated state is above 2.50g/cm3. - Hydrochloric acid solubility is below 3.5%. *For more details, please refer to the PDF document or feel free to contact us.

• Other water treatment equipment
• Filtration Equipment

"Slow sand filter sand" is the filtration sand used in slow sand filtration ponds. The slow sand filtration method is a historic filtration technique adopted when modern water supply systems began in London in the early 19th century, producing high-quality drinking water at a slow filtration rate of 4 to 5 meters per day. The effective diameter, which indicates the particle size, is specified to be between 0.30 and 0.45 mm, and the uniformity coefficient, which indicates the consistency of the particles, must be 2.0 or less according to the Japan Water Works Association standards. Only those that pass product testing are shipped to water purification plants across the country. 【Features】 ■ Low content of impurities, flat or weak sand, and sand iron ■ Washing turbidity is below 30 degrees ■ Density is between 2.57 and 2.67 g/cm³ ■ Loss on ignition is 1.3% or less ■ Friction rate is 3.0% or less *For more details, please refer to the PDF document or feel free to contact us.

• Filtration Equipment
• Other water treatment equipment

"Rapid filtration sand" is the sand used in rapid filtration ponds employing the rapid filtration method. The particle size is defined by an effective diameter ranging from 0.45 to 0.70 mm, with a uniformity coefficient of 1.7 or less, as specified by the Japan Water Works Association standards. However, in general, rapid filtration sands with effective diameters of 0.5 mm and 0.6 mm are commonly used in many water purification facilities. Our company can also produce sand in sizes tailored to your needs, so please feel free to contact us. 【Features】 ■ Low content of impurities, flat or fragile sand, and sand iron ■ Washing turbidity is below 30 degrees ■ Density is between 2.57 and 2.67 g/cm3 ■ Loss on ignition is 1.3% or less ■ Friction rate is 3.0% or less *For more details, please refer to the PDF document or feel free to contact us.

• Filtration Equipment
• Other water treatment equipment

"Rapid filtration sand" is sand used for filtration ponds in rapid filtration systems for water supply. The particle size of rapid filtration sand is defined by the effective diameter, which ranges from 0.45 to 0.70 mm, and the uniformity coefficient, which is 1.7 or less, according to the standards set by the Japan Water Works Association. Generally, rapid filtration sands with effective diameters of 0.5 mm and 0.6 mm are commonly used in many water purification plants. Our company can also produce sand in sizes tailored to our customers' needs. Please feel free to consult with us. 【Product Lineup】 ■ 15L small bags ■ FIBC (Flexible Intermediate Bulk Container) *For more details, please download the PDF or feel free to contact us.

• Filtration Equipment
• Other consumables