How to efficiently dewater brewery sludge? Analysis of the key role of industrial filter cloth in belt press filter

Release time:

2025-05-27

In the dewatering process at the end of brewery wastewater treatment, industrial filter cloths and belts are not "auxiliary consumables", but the core driving force of dewatering efficiency. They transform complex and viscous sludge into transportable, disposable, and reusable dried mud cakes, giving the entire wastewater treatment system a more efficient and greener possibility. Through scientific selection, precise matching, and technological upgrades, filter cloths and filter belts are transforming from traditional "consumables" into "key process carriers". In the future, with the integration and advancement of materials science, intelligent manufacturing, and environmental protection policies, they will demonstrate stronger vitality and broader application prospects in more industrial scenarios.

Brewery wastewater “ Sedimentation and clarification ” : Dewatering practice of industrial filter cloth and filter belt in belt press filter

In modern beer production, the use of water is indispensable, and the fate of water “ is also crucial. For every ” ton of beer produced, it is often accompanied by 1 tons of wastewater discharge, containing a large amount of organic matter, yeast residue, malt residue, and other solid-liquid mixtures. If not treated scientifically and effectively, it will have a serious impact on the environment. 7~10 7~10 In the final stage of brewery wastewater treatment, belt filter presses combined with high-performance industrial filter cloths and filter belts have become one of the key equipment for sludge dewatering. 。

I. Process challenges of sludge dewatering

A large amount of residual sludge produced after brewery wastewater treatment has characteristics such as high water content, rich organic matter content, easy decay, and difficult transportation. The treatment goal is to reduce the water content of this sludge from the original 95% to 60% or even lower, thereby achieving volume reduction, easy transportation, and facilitating resource utilization or final disposal. 。

This puts three requirements on the filtration equipment:

  • Continuous and stable operation, large processing capacity
  • Adaptability to the pressing needs of sludge with high organic load
  • The filter cloth and filter belt have excellent dewatering efficiency and anti-blocking performance

II. Technical path of belt press filter

Belt press filters are widely used in brewery sludge dewatering due to their compact structure, low operating cost, simple operation, and high degree of automation. Its core consists of gravity dewatering zone, wedge pre-pressing zone, and high-pressure pressing zone 。

The workflow is briefly described as follows:

  1. Conditioning stage : The sludge and flocculant are mixed and reacted to form easily dewaterable flocs;
  2. Gravity dewatering : Under the support of the filter cloth, gravity causes free water to flow out quickly;
  3. Wedge pressing : The filter belt is gradually pressurized, causing the sludge layer to gradually thicken;
  4. High-pressure extrusion : Through the alternate pressing of multiple rollers, the sludge is further dewatered to form a mud cake with a lower water content.

In this process, the filter cloth and filter belt are the key components that determine the pressing efficiency and the final water content of the mud cake. 。

III. The core role of industrial filter cloth and filter belt

Industrial filter cloths and filter belts are not only the medium for solid-liquid separation, but also bear the test of high-strength mechanical tension, complex chemical environment, and continuous operation. In brewery wastewater treatment, they need to meet the following key performance requirements:

1.  Excellent dewatering efficiency

The filter cloth should have a reasonable pore structure, which can quickly drain water and effectively retain flocculated particles ，maintaining good water permeability during pressing to reduce the risk of filter belt clogging.

2.  Excellent tensile strength and flexibility

During the operation of the belt press filter, the filter belt needs to be wrapped around the roller many times, bearing tension and bending stress. High-quality filter belts use multi-layer structural weaving technology, combining strength and flexibility ，ensuring that it does not deform or break during long-term operation.

3.  Corrosion resistance and easy cleanability

Brewery sludge often contains yeast, sugar, organic acids, etc., which pose a corrosion risk to the filter cloth material. High-performance filter cloths need to have acid and alkali resistance and good surface smoothness ，facilitating online high-pressure water cleaning and extending service life.

4.  Customized adaptation to different equipment parameters

The characteristics of sludge vary from brewery to brewery, and the selection of filter cloth should be customized according to sludge concentration, flocculation effect, equipment line speed, and operating pressure. For example:

  • Fine weaving type is suitable for the initial dewatering stage;
  • Medium air permeability filter cloth is suitable for the high-pressure pressing stage;
  • Surface coating type filter belt improves anti-blocking performance.

IV. Typical case sharing: Xiamen Xiadias (Citius) Technical practice

Taking Xiamen Xiadias (Citius) Filter Materials Technology Co., Ltd. as an example, it has provided customized belt press filter cloth solutions for many beer companies, achieving significant results. Typical solutions include:

  • Using multi-layer composite woven filter belts ，strengthening surface filtration and longitudinal drainage functions;
  • Using hydrolysis-resistant polyester materials ，improving the stability of the filter cloth in high-temperature and high-humidity environments;
  • With edge reinforcement processing (binding, bonding, sewing), the operating life of the belt under high tension is improved.

经厦迪亚斯 (Citius) After team technical optimization, the water content of the mud cake in the sludge dewatering system of a large brewery has dropped to 60% 以下，滤带更换周期延长至 6 months or more, and the cleaning frequency is reduced 30% ，significantly reducing maintenance costs.

V. Future Trends: Green Efficiency and Intelligent Synergy

With the increasing requirements for energy saving, emission reduction, and resource recycling, brewery sludge dewatering systems are moving towards intelligent control, high efficiency, energy saving, and resource utilization direction. The research and development of filter cloths will also move towards:

  • Lower energy consumption: Develop low-resistance, high-permeability filter cloths;
  • Longer lifespan: Improve fatigue-resistant weaving technology;
  • Stronger intelligence: Combine filter cloth operation data analysis for predictive maintenance.

Conclusion

In this key process of sludge treatment, filter cloths, though inconspicuous, are the decisive force in pressing efficiency . For breweries, a high-performance filter cloth is not only related to whether sludge can be effectively reduced, but also a direct reflection of the company's environmental image and operational cost control.

In the future, in the wave of collaborative development of green beer industry and intelligent water affairs, industrial filter cloths and filter belts will be more “ 隐形 ” in supporting a cleaner and more sustainable beer production process.

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How should food factories select suitable pressing filter cloths and filter belts? Understanding the key aspects of tofu pressing.

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Filter Cloth for Vacuum Belt Dryers — Applications in Food, Pharma, and Chemical Drying Systems

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