|
Wastewater Subsurface Drip Distribution -
Design, Installation and O&M Guidelines
Raymond Ehrhard, P.E.
Overview
Subsurface
drip distribution is the most efficient method currently available for
application and subsurface dispersal of wastewater to soil. Because it is so
effective, drip distribution represents a viable option for wastewater disposal
and reuse for all soil types. The technology is gaining popularity and is
commonly used at sites where point source discharges and National Pollutant
Discharge Elimination System (NPDES) permits are not appropriate due to
environmental sensitivity of receiving streams. It is also commonly used at
sites where conventional drainfields are not appropriate due to site constraints
such as shallow soils above a restrictive layer (for example, rock, groundwater,
and hardpan), steep slopes, or clay soils with low permeability.
There is little guidance available from regulators on this technology and
engineers must rely on vendor information and practical experience. The
information used for this course is a comprehensive peer reviewed compilation
and evaluation of available information and practices used by the industry. In
this course the student will learn how to design subsurface drip dispersal
systems for the treatment of residential wastewater. The course will cover
materials, equipment, system components, installation, operation and maintenance
for the design and installation of drip systems. The course will be beneficial
for a student with little or no background on drip dispersal systems interested
in understanding this popular growing technology. It is also an excellent
overview for those professionals working in the field of wastewater treatment in
providing alternative solutions for difficult applications. Those professionals
with a background in drip dispersal systems will find this course useful in
evaluating the various systems and approaches now being used.
The student is expected to read and review the material contained in
Wastewater
Subsurface Drip Distribution: Peer Reviewed Guidelines for Design, Operation,
and Maintenance,
EPRI, Palo Alto, CA, and Tennessee Valley Authority, Chattanooga, TN:
2004.1007406. This document can be accessed by following web link;
http://my.epri.com/portal/server.pt?Abstract_id=000000000001007406 (used by permission)
The student must take a
multiple-choice quiz consisting of forty (40) questions at the end of this course to earn PDH credits.
Specific Knowledge or Skill Attained
This course teaches the following specific knowledge and
skills:
-
Background on the approach of decentralized wastewater treatment
-
Drip dispersal system materials, equipment and components
-
Site considerations for designing a drip system
-
Design principles and guidance for designing a drip system
-
Installation techniques
-
Operation and maintenance guidelines to be considered
Course
Click on the following
web link and review the source document prior to taking a quiz for credit.
http://my.epri.com/portal/server.pt?Abstract_id=000000000001007406
Having Trouble Downloading the PDF File?
Right click on the link. Select "Save Target As..."
Then save on your desktop. To view the file, double click the icon on your
desktop and return to this page to take the quiz.
You may need Acrobat Reader to view this document.
Click on the link below to download a free copy of Acrobat Reader.
To obtain PDH credits for this course, you will need to take a quiz for
credit. Click on the link below.
(To take the quiz,
your web browser must be set to accept cookies. See how to
check your cookie settings.)
|
