text: Ecosan offers a flexible framework, where centralized elements can be combined with decentralized ones, waterborne with dry sanitation, high-tech with low-tech, etc. By considering a much larger range of options, optimal and economic solutions can be developed for each particular situation. Technologies used in ecosan systems often - but not always - include elements of source separation, i.e. keeping different waste streams separate, as this can make treatment and safe reuse easier.
  The most common technology used in ecosan systems is the urine-diverting dry toilet, but ecosan systems can also use other technologies, such as vacuum toilets coupled with biogas plants, constructed wetlands, composting toilets and so forth.
  Examples of ecosan projects worldwide can be found in a list published by GIZ in 2012, as well as in those case studies published by the Sustainable Sanitation Alliance that are focused on reuse activities.