Views: 221 Author: LOONG FILTRATION Publish Time: 2025-12-16 Origin: Site
Customer Background
In the world of craft brewing, Pilsners and Lagers have always held a central market position, beloved for their brilliant, golden appearance and crisp taste. However, meeting commercial standards for "haze-free and long-term sterile" quality requires more than just chemical fining agents. For beer styles that demand the highest levels of clarity and flavor stability, brewing is only the first step. The true upgrade challenge facing many craft breweries is how to go beyond traditional chemical clarification to achieve "mirror-grade" clarity and a one-year shelf life post-bottling through precision filtration.
A craft brewery, specializing in high-quality Lagers and Pilsners with a batch capacity of 1,000L, sought to expand its distribution reach. With a shelf-life goal of one year, the brewery faced stringent requirements for sterile control during production. LOONG Filtration facilitated a comprehensive upgrade of their pre-bottling filtration system. Working within a spatially constrained production environment, we successfully implemented a compact, three-stage filtration solution, enabling the client to achieve stable, high-efficiency sterile filtration for every 1,000L batch.
Current Process
The brewery focuses on producing Lagers and Pilsners with a batch size of 1,000L. To achieve a shelf life exceeding one year, the client has already implemented a meticulous clarification process:
Wort Stage: Pre-filtration using fining agents during wort transfer.
Post-Fermentation (First Clarification): Application of Cellar Brite to capture proteins and residual yeast via auxiliary fining agents.
Final Clarification (Second Clarification): Utilization of Super F. This positively charged silica sol is specifically designed to target and neutralize negatively charged yeast cells.
Key Core Challenge
| Spatial Constraints | The fixed layout of the brewing facility leaves no room for large-scale equipment. We required an integrated, multi-stage filtration system capable of delivering high performance within an extremely compact footprint. |
| Operational Efficiency | To ensure the 1,000L batch is processed within a 3–4 hour window, the filtration system must consistently maintain a steady throughput of 250–333 L/h. |
| High-Pressure Resilience | Given that the beer is kegged at 2.4 bar after carbonation, the filtration system must be engineered to withstand this operating pressure and remain robust against potential pressure shocks. |
| Goal of Absolute Sterility | Reliance on traditional wort fining agents and auxiliary silica sol is insufficient to eliminate trace microorganisms and yeast spores. Achieving long-term biological stability necessitates the precision of advanced membrane filtration. |
To seamlessly integrate with the client's existing Cellar Brite and Super F clarification processes, we designed a three-stage, graded physical filtration system. This serves as the definitive final barrier, ensuring maximum quality and biological stability following chemical clarification.
| Filtration Stage | Components | Function | Benefits |
| Stage 1: Pre-filtration | 20" 316L Stainless Steel Single-Core Housing, 226 O-ring interface, DN25 Tri-clamp inlet/outlet, Silicone gaskets + 1μm Polypropylene (PP) Pleated Filter Cartridge | Captures flocculants remaining from chemical clarification. | Protects downstream precision filters and ensures the complete removal of residual clarifying agents. |
| Stage 2: Precision Filtration | 20" 316L Stainless Steel Single-Core Housing, 226 O-ring interface, DN25 Tri-clamp, Silicone gaskets + 0.45μm Polypropylene (PP) Pleated Filter Cartridge | Precisely removes residual yeast cells and micro-particulates | Achieves deep physical clarification and significantly enhances visual clarity |
| Stage 3: Sterile Filtration | 20" 316L Stainless Steel Single-Core Housing, 226 O-ring interface, DN25 Tri-clamp, Silicone gaskets + 0.22μm Polyethersulfone (PES) Pleated Filter Cartridge | Absolute retention of remaining microorganisms and bacteria | Achieves "sterile" grade and ensures a one-year shelf life |
Core Hardware System
Mobile Cart Integration: The system is mounted on a compact, SS316L stainless steel mobile frame, featuring a plug-and-play design that integrates three 20-inch, 226-interface single-core filter housings within a minimal footprint.
Sanitary Configuration: The entire system is equipped with DN25 Tri-clamp sanitary fittings and silicone gaskets, facilitating quick dismantling and efficient daily CIP (Clean-in-Place) procedures.
Real-time Pressure Monitoring: Oil-filled diaphragm pressure gauges are installed at the inlet and outlet of each filtration stage. This allows for real-time differential pressure monitoring, effectively preventing filter cartridge damage under the 2.4 bar operating pressure.
High-Performance Pumping: The system is powered by a high-quality, CE-certified sanitary centrifugal pump, delivering a 20–25 meter head to reliably meet the 333 L/h high-efficiency throughput requirement.
Mobile Modular Integration
Stainless Steel Liquid
Filter Housing
PP Filter Cartridge
（1μm）
PP Filter Cartridge
（0.45μm）
| Ultra-high filtration accuracy | Impurity rejection rate ≥99.9% |
| Resistant to acid and alkali corrosion | Wide applicable pH range |
| Low pressure drop and high dirt holding capacity | 50% extended service life |
| Compliant with safety certifications | Suitable for direct contact with food and pharmaceuticals |
| Supports high-temperature sterilization | Stable performance after repeated use |
Advantages of PES Filter Cartridge
| Ultra-low adsorption rate | Active ingredient recovery rate ≥99.5% |
| Broad-spectrum sterilization performance | Microbial retention rate up to 100% |
| Excellent temperature and pressure resistance | Can withstand 121℃ saturated steam sterilization for 30 minutes, and its filtration performance remains unchanged after 100 repeated sterilizations |
| High pleat density design | 50% increase in dirt holding capacity |
| Meets stringent industry certifications | Passed FDA food contact certification and USP Class VI biocompatibility test |
Premium Clarification: The combination of three-stage physical filtration and your existing chemical clarification (Cellar Brite/Super F) acts as a "dual-safety" system. It removes residual substances left by chemical flocculation, achieving laboratory-grade clarity.
Long-Term Biological Stability: Our 0.22μm PES sterile-grade filtration eliminates the risk of secondary fermentation, successfully extending the shelf life to over one year.
Spatial & Operational Efficiency: The mobile cart design achieves high-efficiency filtration within a minimal footprint, significantly reducing the difficulty of production line modifications and shortening processing time.
Production Compliance & Safety: Combining all-SS316L materials with a CE-certified pump ensures full compliance with food safety audit standards, preventing secondary contamination during the bottling process.
As experts in industrial filtration, we deeply understand the requirements for Pilsner and Lager brewing:
Absolute Precision Validation: We perform rigorous 100% integrity testing on our sterile filter cartridges, ensuring genuine sterility throughout your production process.
Industrial-Grade Sanitary Design: Utilizing quick-connect Tri-clamp fittings and oil-filled diaphragm pressure gauges, we ensure that every drop of beer remains pure while operating under high-pressure (2.4 bar) conditions.
Expert-Level Matching: We possess in-depth knowledge of Cellar Brite and Super F clarification mechanisms. We calibrate pre-filtration precision accordingly to ensure your high-cost clarifying agents perform at their peak, while protecting your downstream filtration systems from premature clogging.
Q1: Our current chemical clarification (Cellar Brite/Super F) is highly mature. Why add three-stage physical filtration?
A: Chemical clarification is effective for settling yeast and proteins, but physical filtration captures micro-spores and particulates that chemicals cannot handle. It is the final, critical barrier for achieving "sterile" status and a one-year shelf life—a perfect synergy of chemical precipitation and physical retention.
Q2: How does the PES sterile filter perform under repeated sterilization?
A: The cartridge features excellent thermal resistance, capable of withstanding 121°C saturated steam sterilization for 30 minutes, with no degradation in performance after repeated cycles.
Q3: What are the distinct roles of the PP and PES cartridges in the flow?
A: The PP (polypropylene) cartridge acts as a pre-filter to protect the downstream precision PES filter. The PES (polyethersulfone) cartridge, with its asymmetric membrane structure, provides "absolute" sterile precision, which is the core of ensuring beer sterility.
Q4: Do the sanitary pumps on the mobile cart meet international standards?
A: Yes. All our sanitary centrifugal pumps are CE-certified, ensuring material safety and performance reliability that meet the high-standard requirements for food and beverage production globally.
Q5: How is daily cleaning and maintenance performed?
A: The system uses quick-connect Tri-clamp fittings, and ball valves are provided at the inlet/outlet of each filter. You can perform rapid flushing or CIP (Clean-in-Place) between filtration batches, adhering to strict sanitary maintenance protocols.
Q6: What if our space is extremely limited?
A: This mobile cart system integrates filtration and pumping into a highly compact design, requiring minimal floor space—you don't need to worry about facility layout.
Q7: How does the 0.22μm PES cartridge ensure long-term shelf life?
A: This cartridge provides 100% microbial retention, achieving "sterile-grade" filtration. It thoroughly eliminates the risk of microorganisms and bacteria that cause secondary fermentation.
Q8: Why is the 226-interface with silicone gaskets essential?
A: The 226-interface is the most secure connection in industrial filtration. The silicone gaskets offer excellent temperature and corrosion resistance, are food-grade certified, and ensure a leak-proof seal even at 2.4 bar.
Q9: What does your one-stop service package include?
A: Our quote includes a complete 316L stainless steel mobile cart, three 20-inch housings, a CE-certified sanitary pump, three oil-filled diaphragm pressure gauges, and all necessary DN25 Tri-clamp fittings, clamps, and food-grade gaskets.
Q10: Besides capturing flocculants, what other benefits do PP cartridges offer?
A: PP cartridges offer ultra-high filtration precision (≥99.9% retention), resistance to acid/alkali corrosion, low pressure drop with high dirt-holding capacity, and a 50% longer service life compared to traditional materials, while supporting stable high-temperature sterilization.
Is your brewery looking to break through shelf-life limitations with precision filtration?
LOONG Filtration’s highly integrated mobile filtration system is the ideal upgrade to elevate your product quality. Contact us today for a detailed technical proposal tailored to your brewery.
