Conversion of waste scrubbing liquor into fertilizer
Used, unwanted scrubbing liquor consisting of an equimolar mixture of nitrate and nitrite dissolved in a highly alkaline solution (pH > 13) is now disposed of as a hazardous waste. However, this waste liquor can be converted into nitrate fertilizer by oxidizing the nitrite to nitrate with ozone and neutralizing the alkali with nitric acid to form a nitrate solution at pH 7. This report describes the chemical reactions, procedures, and equipment necessary for converting unwanted, partially depleted scrubbing liquor into nitrate fertilizer. It is concluded that the Hydrazine Waste Water Treatment System at Vandenberg Air Force Base can be used, with only slight modification, to both oxidize and neutralize waste liquor and thereby convert it to fertilizer.
- Research Organization:
- Aerospace Corp., El Segundo, CA (United States)
- OSTI ID:
- 285152
- Report Number(s):
- AD-A-307692/4/XAB; TOR-95(5662)-1; CNN: Contract F04701-93-C-0094; TRN: 62250404
- Resource Relation:
- Other Information: PBD: 1 Feb 1995
- Country of Publication:
- United States
- Language:
- English
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