Method of reducing and controlling hazardous substance in process of high-value biological conversion of urban organic waste
US12122696B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 24, 2021 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Feb 27, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/343
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a method of reducing and controlling a hazardous substance in a process of high-value biological conversion of an urban organic waste. The method includes: 1) mixing a sludge, a first urban organic waste and an organic acid with water for acclimation to obtain an acclimatized sludge; 2) stage 1 of biological conversion: mixing the acclimatized sludge with a second urban organic waste to perform anaerobic culture; 3) stage 2 of biological conversion: adding nitrate and bacteria to continue anaerobic culture so as to obtain an organic acid. In the present invention, sludge microbes are acclimatized and then added to high-value chemicals such as acetic acid, propanoic acid and lactic acid prepared in biological conversion of the urban organic waste and then added with bacteria. Thus, by controlling pH value, microbe addition amount and nitrate concentration, the unfavorable effect of the antibiotics and heavy metal ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.