Walnut Shell Media Filter

Deep bed walnut shell media filter for removing oil and suspended solids from industrial water and wastewater

Product Group:

Screening Filtration Systems

Function:

Removes suspended solids and insoluble hydrocarbons from high-volume industrial water and wastewater streams

Available Models:

Vertical Units: 15 to 635 m³/hr; Horizontal Units: 270 to 2,730 m³/hr; Single units up to 1135 m³/hr; Custom designs available

Product Group:

Environmental Solutions

Chemical Industry

Others

Overview

The Walnut Shell Media Filter is a high-performance deep bed filtration system designed for industrial water and wastewater applications involving oily process water and suspended solids. It delivers reliable, reusable water quality, operates with over 99% uptime, and uses a patented backwashing and media scrubbing process to regenerate the filter bed efficiently without chemicals, surfactants, or air sparging cycles.

Benefits

High Removal Efficiency: Removes 95% to 99% of suspended solids and 90% to 99% of insoluble hydrocarbons.
Chemical-Free Operation: Requires no chemicals, no surfactants, and no air sparging during regeneration.
Lower Water Usage: Uses significantly less backwash water than sand or anthracite filters.
Long Media Life:Black walnut shell media has a very low attrition rate and is designed to last for the filter’s lifetime.
Compact Footprint: Higher flux rates allow smaller filter housings and better use of plant floor space.
Low Maintenance: Automatic patented backwashing system simplifies operation and reduces maintenance burden.

Key Features

The Walnut Shell Media Filter uses a patented rotating media scrubbing assembly and automatic backwashing system to fully regenerate the media bed during each cleaning cycle. The system is designed for high-volume industrial service, offers superior filtration of oil and solids, and provides a durable, skid-mounted solution for fast installation and long-term operation.

Operating Principle

As contaminated water passes through the walnut shell media bed, suspended solids and oil droplets are retained within the media. When the bed becomes loaded, an automatic patented backwashing cycle is triggered by differential pressure or preset timing. During backwash, a rotating scrubbing assembly fluidizes and cleans the media, fully regenerating it for continued filtration service.

Available Options

Other Details

Applications: Oily wastewater, produced water, groundwater treatment, cooling-water recycling and process-water reuse.
Filtration performance: Manufacturer data states 95–99% suspended-solids removal and 90–99% insoluble-hydrocarbon removal, depending on application conditions.
Regeneration: Automatic backwashing is triggered by differential pressure or a preset time signal.