But several years ago, her neighbor began applying sewage sludge, which consists largely of human waste left over from municipal wastewater treatment facilities, as a fertilizer on his farmland ...

She has explored how it is possible to transform municipal sewage sludge and agricultural residues into something useful, namely biochar. The research project has a significant relevance to the ...

The sludge, or biosolids ... Michael Leos, a spokesperson with Lawrence’s Municipal Services and Operations Department, told the Journal-World via email that the city is working on monitoring ...