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Page history last edited by PBworks 14 years ago

 

Waste Treatment:

Typical Septic Systems

 

  

 

 

Primary treatment

 

 

Influx (influent) and removal of large objects

 

 

Sand and grit removal

 

Sedimentation

Primary sedimentation tank at a rural treatment plant
Primary sedimentation tank at a rural treatment plant

 

 

 

Secondary treatment i

 

 

Fluidized bed reactors

 

 

Filter beds (oxidising beds)

Trickling filter bed using plastic media
Trickling filter bed using plastic media

 

 

Biological aerated filters

 

Secondary Sedimentation tank at a rural treatment plant
Secondary Sedimentation tank at a rural treatment plant
 

 

 

 

Living Machines:

 

Originally invented by John Todd, Living Machines are used at a variety of scales from municipal wastewater treatment to back yard greywater recycling

Here is a link to Todd's site with a bunch of case studies

Really, they are just made of buckets, bits of pipe and a few pumps (oh, and  the plants and frogs and things)

 

Backyard Living Machine

 

  An example diagram from one manufacturer: Worrell Water Technologies

 

 

 

 

Some Examples of Use at a municipal scale:

Outdoor tanks:

 

 

Indoor Tanks:

 

 

 Or no tanks: use as a constructed wetland

 

 

 

 

 

 

Methane=Biogas:

 

(Membrane biological reactors)

Biogas can be made from all kinds of stuff: animal manure, human excrement, nitrogen-rich compost: anything that bacteria likes.

Biogas has all kinds of uses

Uses for biogas include:

cooking (see below)

running machinery

refrigeration

generating electricity

 

 

 

The following pictures are from a grassroots website explaining how to make fuel from raw sewage.

http://www.ias.unu.edu/proceedings/icibs/ibs/ibsnet/e-seminar/FranciscoAguilar/index.html

Download Powerpoint Presentation

Here are all the materials you need: (Mainly, just a huge polyethylene bag)

 

 

 The digester installed at a small farm in Vietnam

 

Sewage is added to the digester 

 

these guys have their outhouse connected directly

 

a diagram of the digester

 The final product: cooking gas

 

 

 

 

 

 

 

 

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