The liquid waste water treatment system is a containment, treatment and distribution system for liquid waste water. This system is similar to the wetlands concept which has long been used in exterior applications for thousands of years by humans and nature. This system differs from the wetlands approach in that it treats and processes the ‘untreated greywater’ inside the building and the liquid waste water from the toilet outside of the building.

The botanical cells are plumbed with overflow lines to the conventional 3” septic line out.

The design and layout of the plumbing system is completely normal and conventional. The system outlined meets all International Building Codes. The system is set up (via valving) creating loops. These loops have the botanical treatment cells within them. These loops can be completely by-passed via valving. This does not replace place conventional plumbing, the system outlined is in addition to convention plumbing.

The path of liquid waste water:

  1. After water is used in sinks, showers and bath tubs, it then drains into the greywater planters. The ‘untreated greywater’ is treated in ‘interior botanical treatment cell’ (greywater planters). There is a diverter valve to send the ‘untreated’ greywater to the conventional leach-field instead of the interior botanical treatment cell.
  2. Clean and clear looking ‘treated greywater’ (not drinkable) is pumped to flush the toilet(s).
  3. Next the water goes outside to a conventional septic tank (can be solar heated to enhance the anaerobic process). This unit functions like a regular septic tank (only better). There is a diverter valve to send the toilet water out to a conventional leach-field instead of the next step, into an exterior botanical treatment cell.
  4. After the septic tank, the liquid waste water goes in to an exterior botanical treatment cell(s) (size and quantity varies). These exterior planters are constructed very similar to the interior greywater planters. This facilitates total containment of remaining effluent and directs its use toward exterior landscaping. After this use the water again tests below measurable nitrate levels.

Interior Sewage Treatment Planter

The liquid waste water treatment system is a containment, treatment and distribution system for liquid waste water. This system is similar to the wetlands concept which has long been used in exterior applications for thousands of years by humans and nature. This system differs from the wetlands approach in that it treats and processes the ‘untreated greywater’ inside the building.

interior liquid waste water treatment planter

The botanical cells (planters) are lined and filled with large rocks, smaller rocks, dirt, topsoil and are sloped with a deeper well at one end. The well fills with greywater that did not get used up by the plants. The greywater in the well has been treated by all the roots, good bacteria, oxygenation, etc. that occurs. This ‘treated greywater’ goes through a peat moss filter and is pumped through a charcoal drinking water filter, then sent to the toilet for flushing.

The botanical cells are plumbed with overflow lines to the conventional 3” septic line out.

The design and layout of the plumbing system is completely conventional. The system outlined meets International Building Codes. The system is set up (via valving) creating loops which have the botanical treatment cells within them. These loops can be completely by-passed via valving. This system does not replace conventional plumbing, it is in addition to convention plumbing.

Objectives: Multiple uses of all water where possible, healthy and efficient. Alleviate municipal sewer systems. Provide on-site, self contained treatment of liquid waste water.

Sizing of the planter: 25 sf. of planter space per plumbing fixture.

Location of the planter: The beginning of the planter should be as close to the kitchen sink as possible. see construction drawings.

Exterior Sewage Treatment Planter

The effort to contain the outdoor system rather than letting it leach into the earth is much more realistic and manageable because it is only treating toilet water. More treatment cells can be added if necessary.

exterior liquid waste water treatment planter

Objectives

Multiple uses of all water where possible, healthy and efficient. Alleviate municipal sewer systems and provide on-site, self contained treatment of liquid waste water.

For the purpose of satisfying convention, the Earthship Sewage system is set up (via valving) to flow entirely into the conventional septic tank and on to a conventional leach-field. The Earthship water system is not, therefore, in place of but in addition to convention.

Sizing of the exterior botanical cell(s)

The exterior botanical sewage treatment cell is sized according to the following formula:

gallon per person, per day (toilet drain water) x (w) (winter/dormant days) = volume of drainfield.

There are 7.5 gallons in a cubic foot.

Gallons per person, prepay: a researched figure to use is about 29 gallons of toilet water produced per person, per day. A typical 2 person household will produce approximately 58 gallons of toilet water per day.

Typical winters, dormant plant growing seasons last about 180 days. This figure will change depending on where your job site is located.

58 gal./day x 180 days / 7.5gal. = 1,392 cubic feet

Location of the planter

The beginning of the planter should be as close to the toilets as possible. see construction drawings.

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