The following image intends to depict the current planned research in this new field of anthroponics, as well as the topics of research which I have already covered. The images in blue are the ones planned but not executed. The ones in white are the topics that have been executed in some form or another, as a proof of concept or resulting in a technical report. The one in red was an experiment that did not yield any positive results as a proof-of-concept.
As you can see, this new field of anthroponics can have many different branches. The first main categories relate to the source of nutrients, from the type of human waste used (urine only, feces only, or combined). In this regard, the last two are purely theoretical. The first one can be influenced by parameters which I have not had the opportunity or resources to test for its effects, such as the impact of a different diet as well as collecting from different individuals.
The second main category relates to the treatment of urine prior to its use in an hydroponic system. My method has been focused on the ammonia volatilisation from urea (AVfU), but another researcher in Hong Kong has been experimenting with lactic acid fermentation. Once he has some recorded results or when I perform my own experiment, such information will be shared in this website as well. Unlike AVfU, lactic acid fermentation reduces the pH to 3-4 while preventing bad odors. However, it is still unclear if the resulting liquid can grow plants hydroponically.
In the case of AVfU, the next step is the method of transforming the fresh urine into aged urine. While I have experimented with both alternatives, I have yet to try other catalysts such as jack beans (or even others). The resulting liquid, named “hummonia” (human + ammonia) can be used in many different system configurations, but a precise analysis of the liquid, in terms of its nutrient composition, the presence of microorganisms, persistent organic pollutants or even heavy metals has not yet been performed.
Of all the different system configurations possible, and experiments possible in those systems, the most complicated and potentially impossible one might be the passive system. A passive anthroponics system would have entail a pathway that does not require the energy requirements of an aerobic process or recirculating process. Given my current understand of the processes used in anthroponics, such as nitrification and AVfU, it might not be possible to have a working anthroponics system without the use of an air pump, a water pump, or some sort of mechanical agitation of the liquid.