Bacteria-containing polymer gel for waste water treatment
US5284587A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Feb 8, 1994 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A bacteria-containing two component polymer gel is provided for solubilizing particulate or colloidal organic materials in wastewater. The gel contains a minor amount of a polymer component that is difficult to solubilize by bacteria in the gel and a major amount of a polymer component that is easier to solubilize by bacteria in the gel. The gel contains bacteria for solubilizing material in wastewater and for solubilizing the gel, and nutrients for the bacteria. The gel also contains a bacteria inhibitor such as sodium sulfide or sodium azide that can diffuse out of the gel at a gel-water interface to allow bacteria to dissolve the gel at the interface while preventing an interior region of the gel from prematurely dissolving. The gel is placed in a housing through which wastewater flows and contacts the gel. The inhibitor diffuses out of the gel at a gel-wastewater interface and bacteria dissolve the gel at the interface to release bacteria that produce extracellular enzymes for dissolving material in the waste water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.