西戸崎興産 List of Products and Services

Our company primarily handles activated carbon, which is produced from plant-based and coal-based raw materials through carbonization and activation processes. It is utilized in various fields, leveraging its outstanding adsorption capabilities. 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.

• Water Treatment
• Water treatment technology and systems

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, using manganese sand 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.

• Water Treatment
• Water treatment technology and systems

We would like to introduce the "Main Delivery and Construction Achievements" of Nishitazaki 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 - Kozutsumi 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.

• Other earthworks, foundation works, and exterior floors

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% from implementation (cost recovery in 1-3 years) ■ Cuts unnecessary water with auto flows provided for each water supply faucet ■ Maintains a constant discharge flow rate regardless of fluctuations in water pressure ■ Difference from water-saving devices *For more details, please refer to the PDF materials or feel free to contact us.

• Faucet fittings
• Water Treatment
• Water Treatment Plant

Our company conducts cleaning and inspection of water distribution reservoirs and water purification tanks using "underwater cleaning robots." Previously, the only methods for internal inspection and bottom cleaning of water distribution reservoirs and purification tanks were to drain the water or rely on 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 carry out tasks. To eliminate these dangers, our company employs robotic cleaning operations, ensuring a safe approach. **Features** - Cleaning can be performed without draining the water from distribution reservoirs or purification tanks while maintaining regular water supply. - Internal inspections of distribution reservoirs and purification tanks, which are usually not visible, 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 inspection can be carried out without workers entering the interiors of distribution reservoirs or purification tanks, ensuring hygiene safety and reducing work-related risks. *For more details, please refer to the PDF document or feel free to contact us.*

• Environmental Survey

At Nishitozaki Kousan Co., Ltd., we conduct comprehensive diagnostics of filtration ponds. If the condition of the filter layer is left unaddressed, it can affect the quality of the filtered water and accelerate the contamination of the filter layer, necessitating a complete replacement of the filter media (filter layer renewal) in a short period. Therefore, it is essential to conduct regular filter layer inspections and, if abnormalities are found, to promptly implement appropriate measures such as improving cleaning methods or replenishing sand. [Filtration Pond Inspection (Excerpt)] ■ Contamination status of filter 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.

• Geological Survey
• Environmental Survey

Nishitozaki Kousan Co., Ltd. is engaged in the environmental maintenance and preservation of various water purification facilities. Water treatment facilities must undergo regular inspections and cleaning to ensure a safe, secure, and stable water supply. Additionally, work within the filtration ponds requires utmost care and advanced technology. Our company is highly trusted for conducting "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 civil engineering works
• Environmental Survey

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

• Other resource recycling

"Gravel" is a product that makes it difficult for weeds to grow when spread around the house and is also suitable 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 is salt-free and has good particle shape, making it suitable for mortar production, as well as "gravel for water collection wells" and "gravel for buried water management." [Features] - Creates a soft and calming 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.

• stone
• Spatial Design
• Garden stones, sculptures, fountains, ponds

Our company offers a wide range of products that meet various needs based on years of experience in fields such as sports facilities, water supply 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 types available for various applications - Production capacity boasts 3,000 tons per month - Sufficient response capability with a rich inventory - Available in 20kg (small bag), 500kg, and 1000kg options *For more details, please refer to the PDF document or feel free to contact us.

• Sports related facilities
• 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 a process of washing, particle size adjustment, and high-temperature treatment, ensuring a sterile state. Compared to wet products, the application thickness can be freely adjusted, guaranteeing a significant increase in work efficiency. In addition, we also provide "Topdressing Sand," "Bunker Sand," and "Green Floor Sand," among others. 【Features】 ■ Ideal for greens and tee grounds ■ Various 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 materials or feel free to contact us.

• Sports related facilities
• 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 porous 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.

• Water Treatment
• Water Treatment Plant

"Anthracite" is a filtration material that is selected, crushed, and sieved from high-quality coal known as smokeless coal, resulting in a particle size distribution suitable for filtration. It has a characteristic density of about half that of sand, and even during backwashing, it does not mix with sand due to the difference in density. Therefore, it is widely used as a filtration material for multi-layer 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 oxidants such as manganese dioxide on the surface of the filtration sand. 【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 minimal 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.

• Water Treatment
• Water Treatment Plant

"Filtration gravel" is the support bed for filtration materials. Especially in the case of rapid filtration, a shape close to spherical is required for the flow rectification effect during backwashing. Our company classifies this product, which has been thoroughly cleaned, 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-like substances, or fragile particles - Washing turbidity is below 30 degrees - Density in surface dry saturated condition 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.

• Water Treatment Plant
• Water Treatment

"Slow sand filter sand" is the filtration sand used in slow sand filtration ponds. The slow sand filtration method is a historically significant filtration technique adopted when modern water supply systems began in London in the early 19th century. It produces high-quality drinking water at a slow filtration rate of 4 to 5 meters per day. According to the Japan Water Works Association standards, the effective diameter representing the grain size must be between 0.30 and 0.45 mm, and the uniformity coefficient representing the grain consistency must be 2.0 or lower. 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 lower ■ Friction rate is 3.0% or lower *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment Plant
• Water Treatment

"Rapid filtration sand" is the sand used in rapid filtration ponds employing the rapid filtration method. The particle size is specified by the effective diameter, which ranges from 0.45 to 0.70 mm, and the uniformity coefficient, which should be 1.7 or less, according to the standards set by the Japan Water Works Association. 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】 ■ Contains few 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.

• Water Treatment Plant
• Water Treatment

"Rapid filtration sand" is a type of sand used in rapid filtration systems for water treatment. The particle size of rapid filtration sand is defined by an effective diameter ranging from 0.45 to 0.70 mm, and the uniformity coefficient, which indicates the consistency of the particles, must be 1.7 or lower according to the Japan Water Works Association standards. Generally, 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 customer specifications. 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.

• Water Treatment Plant
• others