Nitrogen from biosolids can help urban soils and plant growth

The "zero waste" trend could have a friend in the form of biosolids. Biosolids are the materials produced after domestic waste is treated in urban wastewater systems. In the past, most of this solid material was transferred to landfills. But, processes developed over the past few decades can create "exceptional quality" biosolids.

source https://www.lifetechnology.com/blogs/life-technology-news-blog/nitrogen-from-biosolids-can-help-urban-soils-and-plant-growth