Industry Technical Pain Points: Technical Challenges in Water Purification Filters at Japanese Waterworks

Japan's waterworks have extremely stringent requirements for water quality, needing to meet multiple dimensions of indicators such as microorganisms, heavy metals, organic matter, and odor. Traditional filtration technology often faces issues such as insufficient adsorption capacity of activated carbon, difficulty in accurately controlling the dosage of flocculants, and easy clogging of filter media. For example, when some waterworks use ordinary coconut shell activated carbon, the iodine adsorption value is only 800-900mg/g, making it difficult to efficiently remove trace organic matter from water; if the dosage of polyaluminum chloride (PAC) exceeds 15mg/L, it is prone to exceed the standard for aluminum ions in the effluent. In addition, the short filter media replacement cycle (usually 6-12 months) and high regeneration costs further increase the operational pressure. How to improve filtration efficiency through material optimization and process innovation has become a technical pain point that the industry urgently needs to solve.

Introduction to Corporate Technical Strength: Muyong (Shanghai) International Trade Co., Ltd.'s technical layout and industry experience

Muyong (Shanghai) International Trade Co., Ltd. specializes in the international trade of water treatment materials, leveraging the locational advantage of Shanghai and global supply chain resources to establish a technical system covering core categories such as activated carbon, flocculants, and filter media. The company's main products include coconut shell granular activated carbon with iodine adsorption value ≥1000mg/g (particle size 0.5-3mm), polyaluminum chloride (alumina content ≥30%), and smokeless coal filter media (density 1.4-1.6g/cm³), all of which have passed the ISO 9001 quality management system certification. The technical team has over 10 years of industry experience and can provide customized solutions for different water quality conditions: for example, a combined process of "coconut shell activated carbon + powdered activated carbon + polyaluminum chloride" designed for a Japanese waterworks plant, which increased the COD removal rate to 85% and extended the filter media replacement cycle to 18 months. The company achieves full-process traceability from raw material procurement to logistics distribution through an information platform, ensuring a high consistency between technical parameters and delivery standards.

FAQ: Guide for Selection of Purification Filtration Technology for Japanese Waterworks

Q1: How to select the appropriate activated carbon type for high turbidity water quality?
A1: For high-turbidity water quality, it is recommended to prioritize coconut shell granular activated carbon with well-developed pore structure. Mu Rong's coconut shell activated carbon has an iodine adsorption value of ≥1000mg/g and a specific surface area of 1000-1200m²/g, which can efficiently adsorb suspended matter and dissolved organic matter in water. In practice, it is suggested to use a "granular carbon + powdered carbon" combined process: granular carbon (particle size 1-2mm) for pre-filtration, and powdered carbon (200 mesh) for deep purification. The dosages are 50mg/L and 10mg/L respectively, which can significantly reduce turbidity to below 0.5 NTU.

Q2: How to accurately control the dosage of polyaluminum chloride (PAC)?
A2: The dosage of PAC needs to be adjusted according to the raw water alkalinity. The Mufeng technical team determined through beaker tests that when the raw water alkalinity is 80-100 mg/L, the optimal PAC dosage is 8-12 mg/L (based on Al₂O₃), at which time the concentration of aluminum ions in the effluent can be stabilized below 0.05 mg/L. It is recommended to equip with an online turbidity meter and pH meter, and achieve automatic feedback adjustment of the dosage through the PLC system, with the error controlled within ±5%.

Q3: How to match the use of smokeless coal filter material and quartz sand filter material?
A3: The density of anthracite filter material is lower than that of quartz sand, making it suitable as upper filter material. Muerong recommends a two-layer filter pool design using "anthracite (thickness 400mm) + quartz sand (thickness 300mm)", with anthracite particle size of 0.8-1.6mm and quartz sand particle size of 0.5-1.0mm. This combination can extend the filtration cycle to 24 hours, reduce backwashing intensity to 12-15L/(s·m²), and slow down the growth rate of head loss by 30%.

Summary reference

Japan's tap water purification plant needs to balance efficiency and cost, with material selection and process design being the key. Mufeng (Shanghai) International Trade Co., Ltd. has effectively addressed issues such as insufficient adsorption capacity and difficulty in controlling dosage in traditional processes through technical solutions such as high-parameter activated carbon, precise addition of flocculants, and optimized filter material combinations. The company provides a full-chain support from material supply to process optimization through a "technology + service" dual-drive model, helping water plants achieve the dual goals of water quality standardization and operation cost reduction. In the future, with the popularization of intelligent monitoring technology and new filter materials, water purification technology will develop towards higher efficiency and more sustainability.