Technical Publications By and About Orenco

Technical Publications by Orenco Engineers

Here are a few of our most frequently requested conference papers and white papers. You can find more of these, as well as technical data for all our products, in our Document Library.

Advanced Treatment Systems

Performance of Textile-Based Packed Bed Filters
Terry R. Bounds, PE
Textile-based packed bed filters, which use a manufactured media that is easily serviced and capable of producing high quality effluent, have greatly expanded packed bed technology options.

Maintaining and Troubleshooting Advanced Onsite Systems: Git 'er Done
T.R. Bounds, PE; Grant Denn; N. Tristian Bounds
For service providers, an overview of how to assess indicators of subpar performance, discover their causes, and correct them.  

Effluent Pumping Systems

Pressure Dosing: Attention to Detail
Eric S. Ball, PE
The advantages of pressure dosing, and how to design systems that incorporate pumps or siphons.

Design, Use and Installation of Dosing Siphons for On-Site Wastewater Treatment
Eric S. Ball, PE
Siphons convert small, continuous flows into large, intermittent dosing flows. They are a cost-effective alternative to pumps in many situations, especially in remote areas and other sites where electricity is difficult to obtain.

Pumps, Controls and Regulations
Terry R. Bounds, PE
An introduction to how pumps, controls, alarms, and sensors function together in onsite treatment systems.

Orenco Automatic Distributing Valve Assemblies
Hydraulic calculations for using Orenco's automatic distributing valve assemblies in effluent distribution systems.


Public Confidence in Onsite Systems Requires Field Testing and Field Standards for Performance
Nicholas Noble
Bench tests evaluate systems under conditions that are not similar to what the system would experience in the real world. They are not capable of reliably gauging how a product will perform in multiple installations with highly variable, real-world conditions. A robust field test standard would allow governments and homeowners to feel confident about relying on advanced onsite treatment.

Sand Filters

Design Criteria for Recirculating Sand Filters
Terry R. Bounds, PE
Recirculating sand filters (RSFs) are a popular means of wastewater treatment for sites with medium to large wastewater flows. They are ideal systems for parks, restaurants, schools, office complexes, large developments, and communities with effluent sewer systems.

Sand Filters and Shallow Drainfields
Harold L. Ball, PE
An introduction to sand filters and shallow pressurized dispersal systems (SPDS), also known as shallow gravelless drainfields.

Optimizing the Performance of Sand Filters and Packed Bed Filters
Harold L. Ball, PE
Describes how to select sand for sand filters, and discusses other media.

Design of Recirculating Sand Filters Using A Standardized Methodology
Jeffrey L. Ball, PE and Grant D. Denn
This standard method for designing sand filters allows modular filters to be constructed.

Septic Tanks

Watertight Tanks: No More Excuses
Eric S. Ball, PE
Watertight tanks are essential to proper performance of any wastewater treatment system. This paper describes why and suggests procedures for testing tanks during installation.

Septic Tank Septage Pumping Intervals
T.R. Bounds, PE
When the economics of effluent sewers are analyzed, tank pumping intervals must be estimated correctly. Research conducted by Orenco shows that a twelve-year pumping interval is typical. This paper presents methods to enable designers, regulators, and operations personnel to size tanks relative to occupancy loading, to achieve adequate hydraulic retention times for settlement of solids, to determine a tank’s optimum effluent withdrawal level, and to predict septage pumping intervals.

Design and Performance of Septic Tanks
T.R. Bounds, PE
Principles for the design, construction, installation, and loading of concrete or fiberglass septic tanks.

Glide Audit 1986-1987 Summary of Sludge and Scum Accumulation Rates
Terry Bounds, PE
Data from Glide, Oregon's STEP system.

STEP Collection Systems

Septic Tank Effluent Pump Systems
Harold L. Ball, PE and Terry R. Bounds, PE
An overview of STEP systems.

STEP Systems: Glide's Contribution to the State of the Art
Terry R. Bounds, PE
Since 1976, the 2,319-unit STEP system that serves Glide and Idleyld Park, Oregon has provided a model for other systems in small communities.

Other Design Resources

Document Library