Over the years I've paid attention to incentives for utilizing the high nutrient content of urine.
I have a urine diversion toilet which at some point I hope to set up with the infrastructure to process the urine into struvite, a slow-release and bio-available fertilizer high in nitrogen and phosphorus. Magnesium oxide is added to the urine to precipitate struvite and adding zeolite has been found to increase the nitrogen content. According to studies pharmaceuticals and heavy metals in the urine are not precipitated with the struvite which is good news.
This week I came across an inspiring article in The Guardian about a new process for capturing nutrients from urine and think it's worth sharing...