phosphorus
131Enhanced biological phosphorus removal — (EBPR) is a wastewater treatment configuration applied to activated sludge systems for the removal of phosphate. The common element in EBPR implementations is the presence of an anaerobic tank (nitrate and oxygen are absent) prior to the aeration …
132The Alchemist Discovering Phosphorus — Artiste Joseph Wright of Derby Année 1771 Dimensions (H ×  …