Ceramic Membranes

The Nanostone Advantage

Nanostone Water’s revolutionary ceramic UF membrane technology is a high surface area pressurized monolith style module which greatly improves the efficiency of permeate flow by providing a low resistance conduit for passage to the outside of the membrane element. This patented design uses multiple rows of channels in a flat sheet segment and incorporates multiple segments in a pressure vessel similar to those used with polymeric hollow fiber membranes. Together with the improved efficiency, the high surface area and the revolutionary segmented construction drastically reduces the cost making the systems using Nanostone’s CM-151™ module competitive with systems using polymeric hollow fiber UF/MF modules.

Membrane Segment

Potted Segments

CM-151™ Monolith Module

Nanostone CM-151™ Specifications

Nanostone Water’s ceramic UF revolutionizes water treatment. Innovations in design and manufacturing technology offer the inherent robustness of ceramics at cost equal to or lower than traditional polymeric membranes.

– Materials: Aluminum Oxide Ceramic with Fiberglass Reinforced Plastic Housing
– Pore Size: Nominal 1 Log Removal of 30 nanometer (0.03 micron) Particles
– Area: 24m2 (258 ft2) Active Surface Area
– Flow Path: Inside / Out with 2.4mm Capillary Channels
– Dimensions: 1.9m High by 0.2m Diameter (75-inch x 8.4-inch)
– Connections: 3-inch Grooved Type Feed and Reject Ports; 2-inch Grooved Type Permeate Port

Current Activities

Nanostone Water conducted multiple pilots throughout the world to validate and optimize performance of our segmented ceramic monolith module. Integral to our product develop effort, the field data obtained from industrial and municipal sites has played a key role in defining product attributes, optimizing operating conditions, and engineering sufficient “robustness” to assure performance across the wide range of conditions. The first commercial industrial process water makeup systems and industrial waste water reuse systems are in commissioning phase now with excellent initial performance results. Nanostone Water expects to launch its second generation CM-151™ ceramic monolith module in 2017 targeting mainstream water applications for industrial process water makeup from a variety of water sources. Nanostone also started the certification process for the NSF 61 and NSF 419 standards to target municipal drinking water and waste water reuse in 2017. Below are some early examples of membrane performance and cost comparisons based on field data obtained from our pilot work.

High Flux

This following data was acquired at a European pilot site with feedwater iron levels of 0.5 to 1.0 mg/L and turbidity ranging from 8 to 12 NTU. A Nanostone Ceramic membrane module with a nominal pore size of 30 nm consistently produced permeate quality < 0.01 mg/L iron and turbidity of < 0.1 NTU. A stable filtration flux of 400 lmh (236 GFD) was observed with a 98% recovery rate. The expected comparable filtration flux for most polymeric hollow fiber membranes operated under the same conditions is ~ 85 lmh (50 GFD). Under these conditions, Nanostone’s ceramic membrane demonstrated an apparent flux advantage 4.7 times that of polymerics. For more in-depth updates of our pilot site progress, please subscribe to our Newsletter.

Ceramic vs. Polymeric Cost Model

Based on the pilot data gathered from various sites over the past year a techno-economic model was developed to estimate the 10 year operating cost and cost of water for a 3 MGD (500m3/hr) industrial waste water reuse plant using UF/MF membranes designed to treat effluent from an existing conventional biological treatment system.  The model assumes a 10+ year life for the ceramic membranes and a 4 year life for the polymeric membranes. Overall the, ceramic membrane system saves $1 Million in operating cost over 10 years and results in a >30% cost of water savings compared to the polymeric membrane model.  In addition there is a 2 million gallon savings of water every month with the higher water recovery rate which can mean substantially more financial savings.  When the capital expense is the same and you save the cost of buying two sets of replacement polymeric membranes as well as a substantial amount of water savings the Nanostone Ceramic advantage is crystal clear.


MF/UF membranes are widely used as a primary process to meet drinking water standards and wastewater reuse treatment. Using Nanostone’s ceramic UF membranes result in a competitive initial capital cost with a lower life cycle costs compared to polymeric MF/UF membranes.

MF/UF membranes play an important role in industrial water treatment. Nanostone’s high surface area UF ceramic membranes are designed to enhance efficiency and performance in these critical applications.

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