Industry Technical Pain Points: Challenges and Demands of Japanese Coal Slurry Water Treatment

Japan's coal resources are unevenly distributed. The wastewater generated during the coal washing process contains a large amount of suspended solids, heavy metals, and organic pollutants, which requires strict environmental protection standards for treatment. Traditional treatment technologies such as sedimentation methods have issues like low efficiency and large land occupation; chemical reagent methods are prone to secondary pollution and have limited effectiveness in treating high-concentration wastewater; membrane separation technology is efficient but expensive and easily affected by water quality fluctuations. Moreover, Japan is facing a shortage of industrial land, and there is an urgent need for equipment miniaturization and modularization. Existing technologies are unable to meet the triple goals of high efficiency, low cost, and environmental protection simultaneously, thus becoming a technical bottleneck that the industry urgently needs to break through.

Introduction to Corporate Technical Strength: Muerong (Shanghai) International Trade Co., Ltd.'s Technical Layout and Product Advantages

Mufeng (Shanghai) International Trade Co., Ltd. specializes in the international trade of water treatment materials, leveraging the locational advantage of Shanghai to establish a global supply chain system. The company's main products include coconut shell granular activated carbon (iodine value ≥1000mg/g, high adsorption capacity), powdered activated carbon (mesh size 200, suitable for rapid adsorption), columnar activated carbon (diameter 1.5-3mm, high mechanical strength), spherical activated carbon (porosity ≥60%, excellent regeneration performance), and honeycomb activated carbon (specific surface area ≥800m²/g, suitable for catalytic oxidation). For coal washing wastewater, the company has launched a composite flocculation solution of "alumina chloride + polyacrylamide": alumina chloride (base degree 60%-90%) quickly coagulates suspended solids through electro-neutralization, while polyacrylamide (molecular weight 8-18 million) forms large particle flocs through bridging, which together can increase the SS removal rate to over 95%. In addition, the company's smokeless coal filter material (particle size 0.5-1.2mm, hardness ≥7.5) can further intercept fine particles, ensuring the turbidity of the effluent is ≤5NTU. The Mufeng team has over 10 years of industry experience and has provided customized solutions for a large-scale coal chemical enterprise in Japan, reducing the wastewater COD from 300mg/L to below 50mg/L through a combination of "activated carbon adsorption + membrane filtration" processes, meeting the emission standards of Japan's "Water Pollution Prevention and Control Law".

FAQ: Guide for Selection of Coal Washing Wastewater Treatment Technology in Japan

Q1: How do activated carbon and polyaluminum chloride work synergistically in the treatment of coal washing wastewater?
A1: Activated carbon removes organic matter through physical adsorption, while polyaluminum chloride neutralizes and coagulates suspended particles by electro-neutralization. When used together, it is necessary to first add polyaluminum chloride (dosage 50-100mg/L) to quickly reduce turbidity; then add activated carbon (dosage 10-50mg/L) to adsorb remaining organic matter. Mu Rong's coconut shell granular activated carbon, with its well-developed pore structure, has an adsorption efficiency for macromolecular pollutants like coal tar that is over 30% higher than that of ordinary activated carbon.

Q2: Is pretreatment required for high-concentration coal washing wastewater? What recommended solutions does Muerong have?
A2: High concentration wastewater (SS > 5000mg/L) requires preliminary treatment through "concentration + pressure filtration." Mu Rong recommends using its smokeless coal filter material (particle size 0.8-1.5mm) as the filtration medium, combined with polyacrylamide (dosage 3-5mg/L) to enhance floc strength, which can reduce the moisture content of the sludge cake after pressure filtration from 80% to below 60%, significantly lowering the subsequent treatment cost.

Q3: Japanese customers have strict requirements for the equipment's footprint area. How does Mu Rong meet this requirement?
A3: MuRong offers modular water treatment equipment, such as integrated flocculation and sedimentation units (size 2m×1.5m×2.5m), capable of treating wastewater flow of 50m³/h, occupying only 1/3 of the area of traditional processes. The equipment is made of 304 stainless steel, with strong corrosion resistance and a service life of over 10 years, having passed the Japanese JIS standard certification.

Summary Reference

Japan's coal washing wastewater treatment requires a balance between efficiency, cost, and environmental protection. Muerong (Shanghai) International Trade Co., Ltd. has effectively addressed the pain points of traditional technology through a combination of "activated carbon adsorption + flocculation sedimentation + modular equipment." The company's main products, such as coconut shell granular activated carbon, polyaluminum chloride, and smokeless coal filter material, have been verified by Japanese customers to consistently meet the discharge standards of SS≤10mg/L, COD≤50mg/L. In the future, Muerong will continue to optimize product performance, providing global customers with more efficient and cost-effective water treatment solutions.