The core role of trash grille bar screens in the wastewater treatment process is to filter and remove solid impurities such as debris, plastics and fibers from the wastewater. However, over time, these screens will gradually accumulate various dirt, causing blockages, which in turn affects their efficiency. Therefore, in order to maintain their optimal operating condition, a systematic cleaning and maintenance plan must be developed and implemented based on the specific type of screen.

Manually Cleaned Grates/Mechanically Cleaned Grates

Manually cleaned grates are the simplest and most cost-effective type of trash grille bar screens. These systems require personnel to physically remove the debris collected on the grate. Because of their simplicity, manually cleaned grates are commonly used in smaller facilities or where the waste load is minimal. However, they require regular attention and labor. The cleaning cycle for these grates can vary depending on the accumulation of waste, but most facilities perform cleaning at least once daily to avoid blockages and ensure smooth water flow. If waste levels are high, more frequent cleaning might be necessary.

Mechanical cleaning screens, on the other hand, rely on mechanisms within them to efficiently remove waste from the screen. This type of grating is more suitable for larger facilities or where waste emissions fluctuate significantly. They greatly reduce the burden of manual screen maintenance and provide a more efficient and stable cleaning process. Cleaning operations are often automated to avoid the accumulation of clutter. To ensure the smooth operation of mechanical components such as motors and scrapers, regular inspections are indispensable, which can effectively prevent the occurrence of operational failures.

No matter what type of grate it is, it is crucial to check its strip screens regularly. This helps us detect and deal with clogging problems in a timely manner, while also checking the screen for potential damage such as rod bends and component wear. In addition, mechanical systems require regular lubrication to prevent rust or corrosion.

Automatic Grates

As a new technology in the field of wastewater treatment, the biggest highlight of automatic grilles is that they achieve efficient debris treatment with low manual intervention. With integrated automated tools such as rakes and conveyors, these systems continuously clear debris from grates.

Another major benefit of automatic screens is that they significantly reduce the labor of manual operation. The intelligent sensors they are equipped with can accurately detect the accumulation of debris and automatically activate the cleaning process. In this way, automatic screens can efficiently remove large amounts of waste while reducing the reliance on uninterrupted human supervision.

Despite the many conveniences that automated systems bring, regular maintenance is still necessary to ensure their proper operation. Wear on mechanical parts and electrical systems needs to be checked regularly, otherwise these components may fail, causing system downtime or reduced performance.

Automatic grilles demonstrate a high degree of flexibility when it comes to cleaning cycles. Cleaning frequency can be programmed based on facility needs. Some systems achieve continuous cleaning, while others cycle based on waste load conditions. Regular preventive maintenance is critical to extending the service life and improving reliability of these systems, especially in facilities with fluctuating waste loads.

Maintenance Of Trash Grille Bar Screen 

The maintenance of the trash grille bar screen is very important. Whether it is a manual, mechanical or automatic type, regular maintenance is required to ensure long-term stable operation. In addition to routine cleaning, maintenance includes inspecting your grilles for signs of wear, corrosion, or other damage. Deterioration of the wastewater environment can cause the grate assembly to degrade, and without proper maintenance, a damaged grate will not be able to effectively capture debris, causing operational issues.

One key aspect of maintenance is checking the alignment and securing of the grates. Misaligned grates can create gaps, allowing waste to pass through untreated. Proper alignment ensures that the grates capture debris efficiently and prevent operational failures.

For systems with electrical components, such as automatic grates, it’s essential to ensure that all electrical connections are waterproof and protected from moisture. Water exposure can cause electrical shorts or damage to the system, which can lead to costly repairs or replacements.

Maintaining the levelness of the grating is essential for its long-term and effective operation. Once the surface of the grating is uneven, it will put additional pressure on the mechanical parts, which will not only reduce its working efficiency but also shorten its service life. Therefore, we need to check the levelness of the grating regularly, detect any potential problems in time, and take appropriate measures to correct them to ensure that the grating can serve us for a long time and stably.

Grille Clogging And Entanglement Problems

The problem of grating blockage and entanglement has always been a major problem in the operation of garbage grating bar screens. Wastewater often carries various solid impurities and fibrous materials, such as plastic bags, branches, textile fragments, etc., which tend to accumulate on the grating. Over time, these accumulations will continue to increase, resulting in increased head loss and reduced water flow. More seriously, if the grating is severely blocked, it may also cause untreated wastewater to overflow and pollute the environment.

In order to prevent grating blockage and keep it running efficiently, we must pay attention to regular cleaning. For gratings that need to be cleaned manually, especially in areas with large waste discharge, daily debris removal is essential. For mechanical and self-cleaning screens, although they can reduce the frequency of human intervention, regular performance checks are still required to ensure that the system is always in good working condition.

The entanglement of fiber materials is also an issue that requires special attention in screen operation. Once these materials are entangled on the screen, they will cause additional stress on the mechanical components. If not handled in time, entanglement problems may cause system damage or accelerated wear. Therefore, we need to develop corresponding management strategies, such as regular manual removal of large or difficult-to-handle debris, to prevent long-term damage.

Trash Grille Bar Screen Manufacturer

Selecting a reliable trash grille bar screen manufacturer is crucial for ensuring the long-term performance and durability of your screening system. Tianjin Kairun, for example, offers high-quality products with a standard 2-year warranty and options for extended coverage. With years of experience in the industry, Kairun provides durable and efficient screening solutions for various wastewater treatment facilities.

Tianjin Kairun’s commitment to quality ensures that our products are built to withstand harsh environmental conditions while maintaining efficiency. If you are looking for a dependable manufacturer for your trash grille bar screen needs, feel free to contact us at catherine@kairunpump.com for more information.

References

1. Water Environment Federation. (2020). Wastewater Collection Systems Management. McGraw-Hill Professional.

2.Metcalf & Eddy.(2013). Wastewater Engineering: Treatment and Resource Recovery. McGraw-Hill Science.

3. Environmental Protection Agency (EPA).(2021). Wastewater Technology Fact Sheet: Screening and Grit Removal. EPA.gov.