Originally Posted By: phinsperger
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Originally Posted By: jbehling
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| phinsperger wrote: |
| On a septic system, what advantage or purpose is there in a dosing chamber? |
What is a mound system?
A septic tank mound system is a technology used for treating and disposing of domestic wastewater in areas unsuitable for conventional septic tank soil absorption systems. Mounds are pressure-dosed sand filters placed above, and discharging directly to, the natural soil. Their main purpose is to provide additional treatment to the wastewater before it enters the natural environment. Mound systems are designed to overcome site restrictions such as:
* Slow or fast permeability soils,
* Shallow soil cover over creviced or porous bedrock, and
* A high water table.
The three components of a mound system are a pretreatment unit(s), dosing chamber, and the elevated mound. See Figure 1 on page 2 for an illustration.
The pretreatment unit is usually a septic tank, which removes solids from the wastewater. The dosing chamber follows the septic tank and contains a pump, which uses pressure to evenly distribute the wastewater over the infiltration surface of the mound[b]. The mound is made up of a soil cover that can support vegetation and a fabric-covered coarse gravel aggregate in which a network of small diameter perforated pipe is placed. The network of perforated pipe is designed to distribute the effluent evenly through the gravel from where it trickles down to the sand media and hence, into the plowed basal area (natural soil). Treatment occurs through physical, biological, and chemical means as the wastewater filters down through the sand and the natural soil.
Mound Systems
Taken From:
http://www.septic-info.com/doc/display/1.html
Originally Posted By: phinsperger
This post was automatically imported from our archived forum.
Originally Posted By: dvalley
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Paul,
Here's a nice diagram to help you understand the workings.
--
David Valley
MAB Member
Massachusetts Certified Home Inspections
http://www.masscertified.com
"Some cause happiness wherever they go; others, whenever they go."