For many years, the dominant narrative around ceramic ultrafiltration has been one of technical excellence tempered by economic caution: a technology that performs better than alternatives but costs more to install and therefore remains confined to the most demanding industrial niches. The webinar organised by Cerafiltec and Smart Water Magazine on 25 June 2026 set out to challenge that framing directly, arguing that the economics have moved further than the industry has yet registered and that the structural pressures now bearing down on water systems make the moment particularly timely.
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Two Cerafiltec speakers led the session: L. Bryan Brister, Managing Director for the Americas, who opened with the market context and the technology and economic case, and Amrith Giridhar, Head of Applications, who followed with a series of real operational deployments.
The pressures, the technology and the economics
Brister opened by situating ceramic technology within a set of structural pressures that go well beyond any individual procurement decision. Drawing on data from the UN, UNESCO, the World Bank and the US EPA, he outlined three converging trends. Over the next decade, a gap exceeding 40% is projected between the supply of suitably purified water and actual demand. Demand itself is expected to grow by more than 25%. And the workforce responsible for operating water treatment infrastructure is retiring faster than it is being replaced: the US EPA projects that between one-third and one-half of all water treatment plant operators will retire within five to ten years, with younger workers not arriving in sufficient numbers.
This workforce dimension, Brister argued, may be the most underappreciated of the three. As experienced operators leave, the value of systems that are simpler to run, more resilient to variation, and less demanding of intensive attention rises considerably. He also pointed to water reuse as a strategic imperative, describing treated wastewater as arguably the only genuinely growing source of new water, one that will require filtration capable of handling contaminants, e.g. biologically treated effluent, at standards that traditional filtration was never designed to meet.
Against this backdrop, Brister turned to what he described as an industry assumption that may now be outdated: that ceramic ultrafiltration is technically superior but economically prohibitive. He walked through the technology itself before making the economic case. Cerafiltec's systems are based on sintered alumina plates, around 34 per module, configured into towers submerged in tanks and operating at low pressure on an outside-in flow basis. Up to 16 modules fit into a single tower, multiple towers into a tank, and multiple tanks into any required configuration, making the system highly scalable. The key material properties that distinguish ceramics are chemical inertness and thermal stability: the ceramic is effectively unreactive, tolerating extreme pH, sustained oxidant exposure and aggressive cleaning that would degrade polymer-based membranes over time.
On the economic case, Brister was specific. The upfront capex premium for ceramics over polymeric ultrafiltration, including PVDF membranes, sits today in the range of 10 to 40%, far below the multiples premium of earlier generations, and in his view not yet fully internalised by the industry. Additionally, the more important figure is what happens over the asset's life. Ceramic systems deliver up to 40% less energy consumption, up to 60% less maintenance, and a lifespan five times or better than polymer-based competitors. The CO2 footprint over the asset life is correspondingly lower. Measured over 10, 15 or 20 years, the total cost of ownership compares very differently from the headline capex figure, and that shift, Brister argued, changes which technology is the rational choice.
Four applications, four settings
Giridhar opened by pushing back on what he described as a persistent misconception: that ceramic membranes belong only in difficult industrial water. Ultrafiltration is ultrafiltration, he said, and ceramic systems are now performing well across the full spectrum of water treatment contexts. He then took participants through four case studies.
A drinking water plant in the Middle East provided the first example, treating well water contaminated with iron and manganese, where a sand filter plus RO configuration was failing. The choice of ceramic was driven by oxidant tolerance: removing metals requires upstream oxidation that polymeric membranes cannot withstand without degrading their useful life. Commissioned in 2023, the ceramic system receives well water directly with only provision for oxidation upstream. The outcome was a significant increase in RO lifespan and the end of repeated membrane replacements.
From groundwater to surface water: the second case involved a drinking water plant that needed to increase capacity within its existing footprint, with feed quality swinging sharply during monsoon seasons and seasonal colour and odour problems. The solution used Cerafiltec's ACLF process, active cake layer filtration, in which activated carbon is dosed into the feed to capture dissolved micropollutants, including PFAS, alongside standard ultrafiltration. Commissioned in 2025, the plant increased throughput to 160 megalitres per day by retrofitting existing sand filter beds with ceramic membranes in place, within the original basin.
Seawater presented yet another context: a desalination plant operated by a state-owned entity in northern Africa, where frequent RO cartridge replacements reflected inadequate pre-treatment. The entire conventional pre-treatment train was replaced by a single ceramic ultrafiltration stage, with raw seawater going directly to the ceramic system with coagulation conditioning, then to RO. Operating since 2024, the plant has managed algae peaks of up to 40 micrograms per litre without additional treatment units and has since expanded by adding further modules.
Wastewater rounded out the picture. An industrial membrane bioreactor in Poland, in the food and beverage sector, has been replacing polymeric membranes every two to three years at 60 to 70% of filtration costs. Ceramic membranes were retrofitted in a like-for-like configuration, cleaning is done in situ with the membranes remaining in the tank, and no replacements have been required. Capacity has since been doubled.
Questions and closing: from procurement to infrastructure
A broad range of cost, contaminant and durability questions followed, reflecting the practical concerns of an international audience spanning utilities, engineering consultancies and industrial operators.
On costs, Giridhar offered an important reframing: the ceramic UF system should not be compared only to an equivalent polymeric UF unit, but to the entire solids pre-treatment chain it replaces, including clarifiers and sand filters. When that full process chain is the basis of comparison, the capital and operational savings are considerably larger than a membrane-to-membrane capex comparison suggests.
On contaminants, the picture that emerged was of a robust technology with honest limits. Polymers in the feed can block pores, and heavy scaling is a risk if not managed proactively, but both respond to proper operation and cleaning. Regarding end-of-life, Giridhar noted that ceramic membranes require no incineration, unlike polymeric equivalents: both the ceramic portion and the encasing resin are fully recyclable, making it a sustainable solution. On lifespan, he observed that in five to six years working with the technology, he had not seen a single replacement, with some systems already past a decade of continuous operation. Having said that, Brister added that although the membranes are very stable, the frames which are made of fiber reinforced plastic, could face degradation by heightened exposure of aromatic solvents such as benzene and toluene.
Brister closed with a forward-looking summary. Asked what would need to happen for the industry to look back in five to ten years and conclude it had underestimated ceramic ultrafiltration, he identified three structural shifts already under way:
- The move from thinking about water stress to water security - a greater premium will be placed on extracting maximum value from every cubic metre treated.
- The rise of treated wastewater as a primary source water - potentially surpassing surface water and desalination in some regions.
- The broadening of sustainability accounting beyond energy and carbon to include water itself.
Taken together, Brister noted, these trends point toward an industry increasingly optimised for reliability, resilience, workforce efficiency and lifecycle value — the qualities where ceramic ultrafiltration has the clearest case.
