Recent worrying science around the "land application" of sewage sludge (biosolids)
Microplastics In Farm Soils Have Adverse Effects On Wheat Crops
UK Government - State of the Environment -
"changes to the composition of waste, have led to new challenges in preventing soil contamination from spreading of treated sewage ... Chemicals enter the wider environment through pathways including spreading of manures and sewage sludge to soils"
"Microplastics (MPs), as a new type of environmental pollutant, pose a serious threat to soil ecosystems ... MPs competed with soil microorganisms for physicochemical niches to reduce microbial activity and eventually, extracellular enzyme activity"
Microplastics negatively affect soil fauna
Spreading biosolids MEANS spreading microplastics. "the effects of microplastics strongly cascade through the soil food webs, leading to the modification of microbial functioning with further potential consequences on soil carbon and nutrient cycling"
Impact of biochar on plant growth and uptake of ciprofloxacin, triclocarban and triclosan from biosolids
"Application of municipal biosolids in agriculture present a concern with potential uptake and bioaccumulation of pharmaceutical compounds from biosolids into agronomic plants."