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A biochemical process for conversion of nitrogenous compound present in the waste water from coke oven consisting of ammoniacal nitrogen, cyanide and thiocyanate. The waste water is treated to remove sludge. It is then subjected to biodegradation reaction in bioreactors in the presence of bacteria to effect a nitrification reaction. The flow of the waste water is controlled in order to maximize the nitrification reaction and the rate of air supply into the bioreactors is also controlled. The treatment is carried out under a pH of between 7-9 to effect optimum nitrification of the nitrogenous compounds present in waste water. The process is affected in a device in which the waste water from the coke oven is stored in a few tank. The waste water is cooled at room temperature and fed to a plurality of biodegradation tanks connected in series through clarifiers, said biodegradation tankers having aeration assembly fixed inside. Means are provided for feeding the waste water to the biodegradable tankers at a predetermined level.
Notices, Deadlines & Correspondence
Patent Information
Applicants
STEEL AUTHORITY OF INDIA LTD.
Inventors
1. PRANAB DAS
2. SUBRATA BHATTACHARYYA
3. HARI DUTTA PANDEY
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 181-cal-2000-granted-specification.pdf | 2011-10-06 |
| 2 | 181-cal-2000-granted-reply to examination report.pdf | 2011-10-06 |
| 3 | 181-cal-2000-granted-pa.pdf | 2011-10-06 |
| 4 | 181-cal-2000-granted-letter patent.pdf | 2011-10-06 |
| 5 | 181-cal-2000-granted-form 3.pdf | 2011-10-06 |
| 6 | 181-cal-2000-granted-form 2.pdf | 2011-10-06 |
| 7 | 181-cal-2000-granted-form 18.pdf | 2011-10-06 |
| 8 | 181-cal-2000-granted-form 1.pdf | 2011-10-06 |
| 9 | 181-cal-2000-granted-examination report.pdf | 2011-10-06 |
| 10 | 181-cal-2000-granted-drawings.pdf | 2011-10-06 |
| 11 | 181-cal-2000-granted-description (complete).pdf | 2011-10-06 |
| 12 | 181-cal-2000-granted-correspondence.pdf | 2011-10-06 |
| 13 | 181-cal-2000-granted-claims.pdf | 2011-10-06 |
| 14 | 181-cal-2000-granted-abstract.pdf | 2011-10-06 |
| 15 | 00181-cal-2000-pa.pdf | 2011-10-06 |
| 16 | 00181-cal-2000-form-3.pdf | 2011-10-06 |
| 17 | 00181-cal-2000-form-2.pdf | 2011-10-06 |
| 18 | 00181-cal-2000-form-18.pdf | 2011-10-06 |
| 19 | 00181-cal-2000-form-1.pdf | 2011-10-06 |
| 20 | 00181-cal-2000-drawings.pdf | 2011-10-06 |
| 21 | 00181-cal-2000-description(complete).pdf | 2011-10-06 |
| 22 | 00181-cal-2000-correspondence.pdf | 2011-10-06 |
| 23 | 00181-cal-2000-claims.pdf | 2011-10-06 |
| 24 | 00181-cal-2000-abstract.pdf | 2011-10-06 |