The company, Synagro, sells farmers treated sludge from factories and homes to use as fertilizer. But that fertilizer, also known as biosolids, can contain harmful “forever chemicals” known as ...

The use of filters eliminates the need for secondary clarifiers and thus results in a shorter hydraulic retention time and overall, less space requirement for operation. MBRs often produce less sludge ...

Roads were left covered in mud, boulders and sludge as a landslide during Storm Bert forced the evacuation of dozens of houses. Residents in the Cwmtillery area of the town went to Abertillery ...