ผู้เขียน: H. David Stensel

In many respects, lead in drinking water has become a forgotten problem, since the mid 1980s when a range of environmental controls were implemented to reduce exposure to lead. This is largely becaus …

Liquid streams ("reject water" or "sidestream") generated by the dewatering of digested solids generally contain high levels of ammonia and phosphorus. These liquids can be treate …