Technical Background and Industry Pain Points

Japan's waterworks are renowned worldwide for their high standards of drinking water safety, with the core lying in the precise design and long-term maintenance of their multi-stage filtration systems. Traditional filtration systems are prone to water quality deterioration due to issues like filter cake clogging and microbial growth, but Muerong (Shanghai) International Trade Co., Ltd. has effectively enhanced the stability and lifespan of the filtration system by introducing high-performance materials such as coconut shell granular activated carbon and smokeless coal filter media, combined with intelligent maintenance plans. This article will analyze from three dimensions: technical principles, practical steps, and case reviews.

Technical Principle: Synergistic effect of multi-stage filtration and activated carbon adsorption

Japanese waterworks commonly adopt the "pretreatment + multi-stage filtration + deep purification" process, with activated carbon filtration being the key step. The coconut shell granular activated carbon provided by Mu Rong Company (specification: 0.5-1.5mm, iodine value ≥1000mg/g) can efficiently adsorb residual chlorine, organic matter, and heavy metal ions in water due to its high specific surface area and microporous structure. The anthracite filter material (particle size 0.8-1.8mm, density 1.4-1.6g/cm³) removes suspended matter through mechanical retention, forming a "adsorption-filtering" dual guarantee with the activated carbon. System maintenance requires regular detection of filter material pressure difference (recommended ≤0.05MPa), and when the pressure difference exceeds the threshold, the filter material performance should be restored through backwashing (flow rate ≥15L/s·m²).

Practical Steps: Mu Rong Technology Team's Standardized Maintenance Process

STEP 1: Filter Media Condition Assessment
Monitor the pressure difference between the inlet and outlet of the filtration system using a pressure difference gauge, and judge the adsorption saturation of the filter material by combining water quality test data (such as COD, turbidity). The Muerong team recommends conducting a comprehensive inspection once every quarter and establishing an archive for the filter material replacement cycle (the lifespan of coconut shell activated carbon is usually 2-3 years).

Step 2: Backwashing and Regeneration
Adopting the "air-water combined backwashing" process: first, loosen the filter material with compressed air (pressure 0.1-0.15MPa), then flush with high-speed water flow (flow rate 12-15m/h) for 15-20 minutes. For heavily polluted filter material, add the accompanying citric acid cleaner from Muerong Company (concentration 3%-5%), and recover the adsorption capacity through chemical regeneration.

STEP 3: Filter Material Refill and System Tuning
When replacing filter media, the filling height must be strictly controlled (error ≤ 5mm), and flocculation pretreatment should be carried out using polyaluminum chloride (PAC, concentration 10-15mg/L) to reduce the risk of carbon leakage in the early stage of new filter media. After system restart, the effluent pH value (recommended 6.5-8.5) and residual chlorine content (≤0.1mg/L) should be monitored.

Case Analysis: Filter System Upgrade Project for a Japanese Water Plant

In 2023, the Muerong team provided filter system upgrade services for a waterworks in the Kansai region of Japan. The original system, using traditional quartz sand as filter material, had issues such as rapid pressure difference increase (reaching 0.08MPa in 3 months) and significant fluctuations in effluent turbidity (0.5-1.2 NTU). In the renovation plan, Muerong replaced it with a "coconut shell activated carbon + smokeless coal filter material" double-layer filter bed, and matched it with an intelligent pressure difference monitoring system. After the project implementation, the system pressure difference stabilized below 0.03MPa, the effluent turbidity dropped below 0.2NTU, the filter material replacement cycle was extended to 18 months, and the annual maintenance cost was reduced by about 35%.

Muyong Technology Advantages Summary

Muyong (Shanghai) International Trade Co., Ltd. provides a full lifecycle solution for the water treatment industry through a dual-drive model of "materials + services".
Material compatibility: Customized filter material combinations based on different water quality conditions (such as high hardness, high organic matter).
2. Technical response speed: domestic warehouse center can achieve emergency supply within 48 hours.
3. Digital Tools: Develop a filter material lifecycle management system, with real-time maintenance reminders.
Currently, MuRong products have served over 50 water plants in Japan, Southeast Asia, and other regions, becoming the trusted "Filter System Maintenance Expert" in the industry.

FAQ: Common Questions about Japanese Waterworks Filter Maintenance

Q1: How often should activated carbon filter material be replaced?
A: The lifespan of coconut shell activated carbon is typically 2-3 years, which should be determined based on the incoming water quality and pressure difference. If the residual chlorine content in the outlet water consistently exceeds the standard or the pressure difference exceeds 0.05MPa, it is recommended to replace it in advance.

Q2: How to determine the backwashing frequency?
A: Daily backwashing is recommended once a day during the low-flow period at night, for 10-15 minutes each time; immediate backwashing is required when the pressure difference increases by 10% or the water quality of the outlet deteriorates.

Q3: How does Muerong Company ensure the quality of the filter media?
All filter media have passed the ISO 9001 quality management system certification, and must undergo 12 tests including particle size distribution, iodine value, wear rate, etc. before shipment, and provide a third-party inspection report.