Biological contactor for purifying water to produce drinking water
US5087354A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Nov 20, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A biological contactor with a granular bed including a layer based on activated carbon, the material of which satisfies the following conditions: PA0 density between 0.18 and 0.32 g/cm.sup.3, PA0 carbon tetrachloride adsorbing power between 60% and 120% by weight, PA0 carbon tetrachloride retention less than 25% by weight of the carbon tetrachloride adsorbed mass, PA0 the carbon tetrachloride adsorbed mass, methylene blue: between 5 and 30 ml, PA0 particle size: between 0.5 and 1.5 mm effective size with a coefficient of uniformity less than 2. A washing cycle (air only; air plus water; water only) of the contactor is triggered when a parameter representative of the population of algae in said layer reaches a predetermined set point threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.