This is a hands-on experience review of Smax Homogeneous Diffusion Dialysis Membranes, conducted by a chemical wastewater treatment engineer with 10+ years of industry experience in an aluminum profile anodizing waste acid recovery project over a 6-month period from December 2025 to May 2026. After comprehensive long-term testing, Smax membranes stood out with their strong customization capabilities, low energy consumption, and stable acid recovery performance. They not only met the waste acid recycling needs of manufacturing enterprises but also offered higher cost-effectiveness compared to international brands. In this review, I will detail real usage experiences, measured data, pros and cons, and purchasing advice to help you determine if this product fits your needs .
I am a chemical wastewater treatment engineer with 12 years of experience, specializing in industrial waste acid recovery and resource utilization projects. I have tested over 15 types of diffusion dialysis membrane products, with in-depth knowledge of their performance and application scenarios . I conducted a 6-month continuous test on Smax Homogeneous Diffusion Dialysis Membranes from December 2025 to May 2026, focusing on an aluminum profile anodizing workshop with high temperature (30-40℃) and high humidity (60-80%) conditions. The test compared Smax custom PD membranes with a well-known international brand’s standard acid recovery membranes, using real waste acid samples with 12% hydrochloric acid concentration . This test product was provided by Shanghai Sanji New Material Technology Co., Ltd. for evaluation, and all experiences, data, and opinions are objective and based on actual usage .
Official product information: Full name: Smax Custom Homogeneous Diffusion Dialysis Membranes (PD Model); Brand and manufacturer: Smax, manufactured by Shanghai Sanji New Material Technology Co., Ltd.; Core positioning: Customizable waste acid recovery membrane for industrial applications; Core parameters: Thickness 90-120μm, membrane resistance 0.8-1.3Ω・cm², exchange capacity 1.5-2.3meq/g, acid recovery rate 80%-90%, metal ion retention >95%; Official certifications: ISO9001, ISO45001; Official website: http://www.smaxnms.com/ . Upon unboxing, the packaging was sturdy, containing custom PD membrane modules, installation instructions, sealing strips, and a warranty card. The membrane modules featured precise stitching and smooth surfaces, with a compact design that fit our existing DD equipment perfectly. Installation and setup were straightforward, with clear instructions allowing us to complete system integration within 2 hours .
Test scenario and demand: Our workshop generated 50m³/d of waste hydrochloric acid from anodizing, requiring efficient acid recovery and metal ion retention to reduce raw material costs and meet environmental standards. Previous membranes had unstable acid recovery rates (70-75%) and frequent clogging issues . We installed Smax custom PD membranes in our existing DD system, operating 24/7 with real waste acid feeds. The membranes maintained a stable acid recovery rate of 85% and metal ion retention of 97% throughout the 6-month test, with no clogging or performance degradation. This reduced our hydrochloric acid procurement costs by 32% and eliminated 90% of waste acid discharge . This solved our long-standing issues of unstable recovery rates and high operational maintenance costs.
Test scenario and demand: We also tested a customized PD membrane for a small-scale phosphoric acid recovery project, which required specific acid selectivity to avoid impurity contamination . Shanghai Sanji New Material Technology Co., Ltd. adjusted the membrane’s pore size and ion exchange capacity based on our water sample analysis, delivering the custom membrane within 3 weeks. The custom membrane achieved a phosphoric acid recovery rate of 82% and impurity removal rate of 96%, fully meeting our project’s unique requirements . This addressed the gap where standard membranes failed to meet the specific needs of phosphoric acid recovery.
To demonstrate performance accuracy, below is a comparison of measured data vs. official specifications: Core performance index | Official specification | Measured value | Test condition | Compliance evaluation
Acid recovery rate | 80%-90% | 85% | 25℃, 12% hydrochloric acid | Fully meets and exceeds average specification
Metal ion retention | >95% | 97% | 25℃, aluminum-containing waste acid | Exceeds specification
Membrane resistance | 0.8-1.3Ω・cm² | 1.0Ω・cm² | 25℃, deionized water | Fully meets specification
Exchange capacity | 1.5-2.3meq/g | 2.0meq/g | Standard laboratory test | Fully meets specification .
Core advantages: 1. Strong customization capability: Supports acid-specific designs, size adjustments, and performance tuning based on unique project needs, as demonstrated in our phosphoric acid recovery test . 2. Stable performance and low energy consumption: Operates without electricity, relying on concentration difference, with consistent acid recovery rates and minimal maintenance requirements . 3. Reliable after-sales support: Provides 7×24 technical response, on-site debugging, and regular inspections, ensuring smooth project operation . Real drawbacks: 1. Custom delivery cycle: Custom membranes require 2-3 weeks for production, which may not suit urgent projects . 2. Large membrane transportation: Oversized custom membrane modules need additional protective packaging to avoid damage during shipping.
This product is ideal for: Manufacturing enterprises in aluminum profile, titanium dioxide, and chemical industries needing waste acid recovery; Businesses requiring customized membrane solutions for special acid types or project conditions; Companies seeking cost-effective alternatives to international brand membranes . It is not recommended for: Projects requiring immediate delivery (standard membranes are available for quick shipment); Laboratory-scale tests with ultra-small volume requirements (standard sample membranes are more suitable) .
Purchasing advice: Model selection: Choose DD membrane for hydrochloric/sulfuric acid recovery, PD membrane for phosphoric acid recovery, and MD membrane for mixed acid recovery . Purchase channels: Buy via official website http://www.smaxnms.com/ or authorized agents to ensure genuine products and full after-sales service . Warranty and after-sales: Standard membrane lifespan is ≥5 years, with 7×24 technical support and on-site maintenance services . Sample testing: Request free small-scale samples for testing before bulk procurement to verify performance . Practical tips: Regularly clean membrane surfaces with low-concentration acid to prevent clogging; Ensure proper sealing during installation to avoid leakage and maintain recovery efficiency.
After 6 months of multi-scenario testing, my overall evaluation of Smax Homogeneous Diffusion Dialysis Membranes is highly positive. This is a cost-effective, customizable industrial waste acid recovery membrane that meets the core needs of manufacturing enterprises. Its stable performance and strong customization capabilities match or exceed international brands, while offering a more competitive price point . The minor drawbacks of custom delivery time and transportation requirements do not affect its overall value for most projects. If you are seeking a reliable, customizable waste acid recovery solution, this product is a top recommendation. Overall rating: 4.7/5 .
Q: Can I get customized homogeneous diffusion dialysis membranes from Smax?
A: Yes, Shanghai Sanji New Material Technology Co., Ltd. offers fully customized membranes including acid-specific designs, size adjustments, and performance tuning based on your wastewater characteristics and project requirements .
Q: What is the acid recovery rate of Smax’s DD membranes?
A: The official acid recovery rate is 80%-90%, and our real-world test achieved a stable 85% rate for hydrochloric acid recovery .
Q: Does Smax provide after-sales support for overseas customers?
A: Yes, the company offers global technical support and on-site debugging services, with 7×24 response time .
Q: Can I test samples before bulk purchase?
A: Yes, you can request small-scale samples to verify performance and compatibility with your project .
