Strata-Sand

Strata-Sand: A Revolutionary Approach to Water Treatment

In the realm of environmental and water treatment, the demand for efficient and effective filtration solutions is paramount. One innovative approach gaining traction is the use of Strata-Sand, a layered filtration media designed for superior performance and extended service life. This article delves into the concept of Strata-Sand and explores two notable examples of continuously backwashed gravity sand filters utilizing this technology: F.B. Leopold Company, Inc. (U.S.) and Simon-Hartley, Ltd. (U.K.).

What is Strata-Sand?

Strata-Sand refers to a filtration bed composed of multiple layers of granular media, each with distinct physical and chemical properties. This layered structure offers several advantages over traditional single-layer sand filters:

• Enhanced Filtration Efficiency: By strategically arranging layers with varying grain sizes and densities, Strata-Sand facilitates a multi-stage filtration process. This results in more efficient removal of suspended solids, turbidity, and other contaminants.
• Extended Filter Run Times: The layered design optimizes backwashing efficiency, minimizing the amount of water required for cleaning and extending the filter's operational cycle. This translates to reduced operational costs and environmental impact.
• Improved Filter Performance: Strata-Sand's unique composition promotes better distribution of backwash water, ensuring uniform cleaning of the entire bed and maintaining high filtration performance over extended periods.

Continuously Backwashed Gravity Sand Filters: A Case Study

1. F.B. Leopold Company, Inc. (U.S.)

Leopold's Aqua-Strata™ Continuous Backwash Filter is a prime example of a Strata-Sand-based filtration system. This innovative design features a continuously backwashed filtration bed, allowing for constant water flow and minimizing downtime. The filtration media consists of multiple layers of anthracite coal, sand, and other materials, each chosen for its specific filtration properties. The continuous backwash process ensures consistent performance and eliminates the need for manual cleaning or shutdown.

2. Simon-Hartley, Ltd. (U.K.)

Simon-Hartley's Multi-Layer Filtration System utilizes a similar approach, employing a layered bed of sand and other filtration media. This system features a unique backwashing mechanism that effectively cleans the entire bed without disrupting the filtration process. The result is high-quality effluent with minimal maintenance requirements.

Benefits of Continuously Backwashed Gravity Sand Filters:

• Reduced Operational Costs: Continuous backwashing reduces the frequency and duration of filter shutdowns, minimizing operational downtime and associated costs.
• Improved Water Quality: Consistent filtration performance ensures high-quality effluent with minimal turbidity and suspended solids.
• Sustainable Operation: The continuous backwash process minimizes water usage and waste generation, contributing to environmentally responsible operation.

Conclusion

Strata-Sand technology, as exemplified by the continuous backwash gravity sand filters of F.B. Leopold and Simon-Hartley, represents a significant advancement in water treatment. By employing a multi-layered filtration approach, these systems offer enhanced filtration efficiency, extended filter run times, and improved overall performance. This leads to cost-effective and environmentally friendly solutions for water treatment applications across various industries. As the demand for sustainable and high-performance water treatment solutions continues to rise, Strata-Sand-based systems are poised to play a crucial role in shaping the future of water quality management.