| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Biological sludge | Meteorology & Standards | The sludge floc produced in raw or settled sewage by the growth of zoogleal bacteria and other organisms in the presence of dissolved oxygen, and accumulated in sufficient concentrations by returning floc previously formed. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
