Sulfide ion-selective electrodes for control of chemical feed of organic sulfide products for metal ion precipitation from waste water
US5401420A · kind A · utility
18Cited by
6References
3Claims
0Family size
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Key dates
| Filing date | Mar 23, 1994 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Mar 23, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A wastewater treatment system and method for chemical precipitation and removal of metals from wastewater in a continuous or batch treatment process includes an ion-selective sulfide electrode and a reference electrode disposed in a precipitation tank for measuring an electrochemical potential therebetween in a predetermined range. A controller unit is provided which is responsive to the electrochemical potential in the predetermined range and is connected to a precipitant feed unit for automatically controlling the chemical precipitant fed into the precipitation tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.