Method for processing manure, fermented manure and ammonium nitrogen containing waste water
US5296147A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/903
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention relates to a method for processing manure, fermented liquid manure being subjected to nitrification in a first step and to denitrification in a subsequent step, an aerated reactor which contains active sludge rich in nitrifying bacteria being used in the nitrification step and acid-neutralizing chemicals being added to said reactor if necessary and a continuously fed upflow sludge bed (USB) reactor which contains a very compact biomass which is capable of converting nitrate to nitrogen gas and to which an organic substrate is added being used in the denitrification step, the loading of the reactor being controlled to obtain an optimum nitrification and denitrification and this is obtained on the basis of one or more of the following data: PA1 the incoming nitrogen load; PA1 the information from the WAZU respiration meter; PA1 the pH in the nitrification reactor, the criterion for which is that the pH is in the range limited by 6 and 8.5; PA1 the temperature in both the nitrification reactor and the denitrification reactor is kept below 40.degree. C.; PA1 the concentration of oxidized nitrogen in the influent for the denitrification reactor, the criterion for which is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.