pureflow biological filtration system

Reliable Contaminant Removal Through Engineered Biological Processes

Biological Filtration

Pureflow biological filtration systems provide an effective, sustainable, and increasingly popular solution for the removal of dissolved contaminants from potable water supplies. Unlike conventional treatment processes that rely primarily on chemical oxidation and coagulation, biological filtration utilizes naturally occurring specialized bacteria that colonize filter media and metabolize targeted contaminants. This biological treatment approach can significantly reduce chemical consumption while providing reliable long-term water quality improvement.

Biological treatment has proven particularly effective for the removal of contaminants such as iron, manganese, ammonia, hydrogen sulfide, and other naturally occurring compounds that can impact water quality, regulatory compliance, taste, odor, and system performance. Through carefully controlled operating conditions, beneficial microbial populations establish themselves within the filtration media, creating a robust treatment environment capable of continuously removing contaminants as water passes through the system.

One of the primary advantages of biological filtration is its ability to treat elevated contaminant concentrations more efficiently than many conventional oxidation and coagulation processes. As contaminant levels increase, traditional treatment systems often experience higher solids loading rates that require more frequent backwashing and increased operator attention. Biological filtration systems can substantially reduce solids accumulation and improve overall treatment efficiency, often extending filter run times and reducing backwash frequency compared to conventional coagulation filtration systems treating similar water quality conditions.

Pureflow biological filtration systems are custom engineered to address site-specific water chemistry, treatment objectives, and operational requirements. System designs may incorporate biological pressure filters, biological activated carbon filtration, specialized filtration media, aeration systems, nutrient management, and automated controls to optimize biological activity and treatment performance. The result is a reliable, low-maintenance treatment process that minimizes chemical dependency while maintaining consistent water quality.

With extensive experience in biological water treatment, pilot testing, process development, and system commissioning, Pureflow provides complete biological filtration solutions for municipal and industrial applications. These systems offer a cost-effective approach to contaminant removal while reducing chemical usage, lowering operating costs, and supporting long-term sustainable water treatment objectives.

Features & Benefits

  • Uses natural biological processes to remove of contaminants

  • No chemical regeneration required

  • Reduced chemical consumption compared to conventional oxidation systems

  • Low backwash frequency with efficient cycles to minimize water use

  • Stainless steel wedge‑wire underdrain laterals for uniform flow distribution

  • PLC / HMI‑based control panel for automated system operation

  • Electrically actuated valves for reliable automated operation

  • Designed for low operator attention and simplified maintenance

Ozone–Biologically Activated Carbon | O₃-BAC

Pureflow biological water treatment systems are a solution for elevated levels of iron, manganese, and nitrate. Pureflow O₃-BAC systems combine ozone oxidation with biologically activated carbon filtration to deliver a robust, multi-barrier treatment solution. Ozone breaks down complex organics, micropollutants, and pathogens into biodegradable compounds, enhancing downstream biologically activated carbon performance.

Features & Benefits

  • Fully integrated O3-BAC system delivers complete treatment in one engineered package

  • Containerized option minimizes site work and accelerates installation

  • High-efficiency ozone mass transfer and contactor maximizes oxidation & contaminant removal

  • Integrated backwash and air scour maintain consistent filer efficiency

  • Automated controls ensure reliable performance with minimal operator input

  • Energy efficient

  • Safe, quiet, and reliable ozone generator

  • Compact footprint

  • High operating gas pressure (up to 43.5 psig) for efficient dissolution

Granular activated carbon

For the Removal of

  • Nitrate

  • Iron

  • Manganese

  • TOC/VOC

  • Micropollutants

Water By Pureflow, Better Than Nature Made.