The information that is listed here relates to the recycling of urine and feaces, as it will be collected in the BathRoomBox. On the item of composting feaces with some of the urine, much information can be found, as is shown below.
However we need to tackle the harder problem of finding information on extracting the nutrients from urine. To be in practice applicable as fertilizer, nutrients from urine should become transportable as a dry powder and not as a liquid. Even more innovative development it will take when the process to produce dry fertilizer from urine, has to be small scale and should need little investment.
The following items indicate the direction of this search: