T-N Removal of Acrylonitrile Wastewater by Supercritical Water Oxidation
- T-N Removal of Acrylonitrile Wastewater by Supercritical Water Oxidation
- 신영호; 이헌욱; 김재훈; 이윤우
- T-N Removal; Acrylonitrile Wastewater; Supercritical Water Oxidation
- Issue Date
- 2009 한국화학공학회 춘계학술 발표회
- , 228-228
- The removal of T-N (total nitrogen) from wastewater is important because total nitrogen in water causes eutrophication which can have a negative influence upon the stability of an ecosystem. For this reason, many countries regulate the amount of nitrogen (organic-nitrogen, ammonia, nitrate and nitrite) in discharged streams. Acrylonitrile wastewater from acrylonitrile manufacturing plant has mainly been treated with microbial degradation, despite the fact that it is difficult to biodegrade. To decrease the amount of nitrogen in acrylonitrile wastewater, experiments were carried out at temperatures from 350 to 550℃ and a fixed pressure of 250 bar. The residence time ranged from 3 to 15s, and the initial T-N of acrylonitrile solution was set 11,995mg/l. 31.71wt% H2O2 solution was used as an oxidant and the stoichiometric ratios of O2 based on initial TOC ranged from 0.5 to 2.5 As a result, T-N of acrylonitrile wastewater was reduced by 45% within 15s at temperature of 550℃. To increase T-N removal, ammonia and urea were used as additives which play a key role to reduce T-N of acrylonitrile wastewater.
- Appears in Collections:
- KIST Publication > Conference Paper
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.