Intermittent Sand Filter Treatment Systems
Photo courtesy of Orenco SystemsŪ
Illustration courtesy of Orenco SystemsŪ
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Applications
Intermittent sand filters (ISFs) are the ideal solution where high ground water, poor soils, or other site constraints rule out a conventional septic system. With a long history of superior treatment, ISFs outperform aerobic treatment plants. Tucked neatly underground, modern ISFs can be planted over with lawn or flowers to blend into the landscaping. Now you can safegaurd your family and enjoy your yard too!
Sand filter technology has been around for over 100 years! Orenco Systems is the world leader in alternative wastewater treatment systems. Orenco offers the only complete, pre-engineered kits for sand filters on the market today. Designed for easy installation, Orenco's patented* sand filter kits are made of high-quality, reliable components, selected for efficiency and longterm performance.
How does an ISF work?
Following primary treatment in a septic tank, wastewater from a home is filtered by Orenco's patented Biotube® Pump Vault Technology to keep solids in the tank and out of the sand filter. The clarified wastewater is then pumped to pressurize the distribution manifold on top of the sand filter bed. Evenly spread over the surface of the bed, the wastewater percolates through the sand, where naturally occuring microorganisms clinging to the particles organically break down contaminants. In the bottom of the sand filter, treated effluent-now clear and odorless-is collected and conveyed by pump or gravity to landscaping for subsurface irrigation or to a reduced-size drainfield.
Sand filters made easy
- Standard ISF designs fit nearly any site.
- Complete ISF kits: Orenco's experience delivered to your door.
- Easy-to-follow installation instructions.
- Comprehensive owner's manuals.
- Cold weather options available.
Reliability you can trust
- Nothing beats ISFs for consistent effluent quality even when faced with system fluctuations and stresses.
- Every Orenco kit and pump is engineered for long life.
- Simple maintenance requires an average of only 30 minutes a year. No routine raking, tilling, or replacement of the sand.
An Orenco sand filter kit simplifies an installer's life-no shopping around for parts. It's also the best way to guarantee that installations are of consistent quality. Inspectors like Orenco's sand filter kits because they know what to expect and feel comfortable with their proven record. The homeowner wins too with a sand filter system that engineered to be not only dependable but easy to monitor and maintain. Power costs average 3¢-6¢ a day.
The following chart gives performance expectations for effluent discharged directly from the intermittent sand filter:
| Treatment System |
BOD5 mg/L |
TSS mg/L |
NH3 mg/L |
Fecal Coliform |
| Orenco ISF |
< 5 |
< 5 |
< 1 |
< 100 attainable |
A handy learning tool for home owners, installers, and designers is the Intermittent Sand Filter Video. This video is 28 minutes long, and covers the installation of an ISF and the O&M requirements for an ISF. This is a great introduction to sand filters for the first time contractor. Videos are available for $9.99 each by calling (877) 212-3219, ask for the ISF video.
To learn more about Orenco's Intermittent Sand Filter Systems, visit Orenco Systems' ISF website.
* Covered by U.S. patent numbers 5,360,556; 5,492,635; and 4,439,323.
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