흡착산화 공법을 이용한 원자력 발전소 2차 계통 냉각수로부터 발생하는 에탄올 아민 함유 폐수처리 공정 연구
- 발행기관 강릉원주대학교
- 지도교수 김한수
- 발행년도 2017
- 학위수여년월 2017. 8
- 학위명 박사
- 학과 및 전공 일반대학원 생명화학공학과
- 세부전공 폐수처리
- 파일정보 박사학위논문
- 실제URI http://www.dcollection.net/handler/kangnung/000000009761
- 본문언어 한국어
초록/요약
Study on Treatment of Wastewater containing Ethanolamine from Coolant of the Secondary System of Nuclear Power Plant by Adsorption Oxidation Method Min Jun Choi Department of Biochemical Engineering, Graduate School Gangneung-Wonju National University Abstract Wastewater including ethanolamine used in the second generation of nuclear power plants is filtered out in the ion exchange resin of the Condensate polishing plant. In the process of regeneration of ion exchange resin, strong acidic wastewater containing ethanolamine and a lager amount of ionic substance are leased. This wastewater is a chemically stable, refractory wastewater and produces high COD and T-N. Currently, ethanolamine-containing wastewater is treated with 50~60% of COD and T-N by electrochemical decomposition technology, and then treated in an integrated wastewater treatment plant. However, the total wastewater treatment plant requires COD and T-N levels of over 95%. The reason is for stable management of microorganisms that depend on biological treatment. Therefore, in this study, research data on the advanced treatment technology of the refractory wastewater of existing researchers were investigated. Based on the results of the survey, the research was conducted to derive processes with high possibility of processing. UV, UV/GAC, O3/ GAC and UV/O3/GAC processes were selected and sequential comparison studies were conducted. Through the research process, operating conditions that can process over 95% were derived. The results obtained are adjusted to pH 12.8 or higher using the UV/ O3/GAC process and then subjected to the first treatment and if the pH drops below 12, the GAC regeneration process is performed. In the second treatment operation, the pH is further adjusted to pH 12.8 or higher and then reprocessed. As a result, the number of treatments suitable for the linkage treatment and discharge treatment standards was secured. The water treatment conditions by the adsorption oxidation reaction implemented in the UV/O3/GAC process are ① Photolysis effect of UV lamp, ② OH radical generation reaction by ozone decomposition reaction and UV energy absorption, ③ Increase of hydroxide ion by NaOH which is a pH regulator promotes the generation of OH radical, ④ adsorption fixation effect using GAC for continuous oxidation, ⑤ Removal by degassing after conversion of NH4+ to NH3 for T-N removal, ⑥ Removal by forced permeation into GAC, ⑦ Reprocessing effect by repeated injection after pH adjustment And the effect of reprocessing. The equipment in which these effects are implemented is shown in Figure 15. Using the wastewater treatment plant designed for the study, more than 95% of COD and T-N induced by ETA wastewater were treated. On the other hand, the regeneration study of granular activated carbon was carried out in the facility using the operation conditions of the wastewater treatment facility. And further study was carried out to remove the COD increased by the regeneration process. Through this research process, the process and operating conditions with COD and T-N removal effect suited to the discharge standard were derived. The obtained results show that the COD of the final treated water after the first operation, the second operation and the regeneration process is 12mg/L and the T-N is 13mg/L when the UV/O3/GAC process is performed at pH 12.8. Subsequent processing can be either linked processing or stream discharge. However, it is necessary to neutralize the pH, and then to treat it or to discharge it. The neutralization method can neutralize the pH using the final treated water discharged from the existing waste water treatment plant of the nuclear power plant. Keyword : Adsorption oxidation, ETA wastewater, ultraviolet oxidation, ozone oxidation, stripping, GAC, regeneration process.
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목 차
Ⅰ. 서론 1
1.1 연구배경 및 필요성 1
Ⅱ. 에탄올아민 함유 폐수 처리를 위한 기초연구 18
2.1 에탄올아민 함유 폐수 발생 현황 18
2.1.1 원자력발전소 현황 18
2.1.2 에탄올아민 함유 폐수 발생량 23
2.1.3 에탄올아민 함유 폐수의 물리화학적 특성 26
2.2 활성탄의 에탄올아민 함유 폐수 흡착제 선정 평가 29
2.2.1 실험 재료 및 분석기기 29
2.2.2 실험 조건 29
2.2.3 실험 결과 30
2.3 에탄올아민 함유 폐수 처리용 UV램프 선정 평가 35
2.3.1 실험 재료 및 분석기기 35
2.3.2 실험 조건 35
2.3.3 실험 결과 및 고찰 38
2.4 에탄올아민 함유 폐수 처리용 UV/GAC 선정 평가 44
2.4.1 실험 재료 및 분석기기 44
2.4.2 실험 조건 44
2.4.3 실험 결과 및 고찰 47
2.5 에탄올아민 함유 폐수의 T-N 탈기 기초 연구 58
2.4.1 실험 재료 및 분석기기 58
2.4.2 실험 조건 58
2.4.3 실험 결과 및 고찰 60
Ⅲ. 에탄올아민 함유 폐수 처리를 위한 흡착산화 공정 연구 63
3.1 폐수 처리 실험 설비 제작 63
3.2 UV 공정을 이용한 COD, T-N 제거 실험 69
3.2.1 실험 재료 및 분석기기 69
3.2.2 실험 조건 69
3.2.3 UV 공정 실험 결과 및 고찰 71
3.3 UV/GAC 공정을 이용한 COD, T-N 제거 실험 78
3.3.1 실험 재료 및 분석기기 78
3.3.2 실험 조건 78
3.3.3 UV/GAC 공정 실험 결과 및 고찰 80
3.4 O3/GAC 공정을 이용한 COD, T-N 제거 실험 93
3.4.1 실험 재료 및 분석기기 93
3.4.2 실험 조건 93
3.4.3 O3/GAC 공정 실험 결과 및 고찰 95
3.5 UV/O3/GAC 공정을 이용한 COD, T-N 제거 실험 105
3.5.1 실험 재료 및 분석기기 105
3.5.2 실험 조건 105
3.5.3 UV/O3/GAC 공정 실험 결과 및 고찰 107
3.6 UV/O3/GAC 공정 반복운전 실험 결과 118
3.6.1 실험 재료 및 분석기기 118
3.6.2 실험 조건 118
3.6.3 UV/O3/GAC 공정 반복운전에 실험 결과 및 고찰 120
Ⅳ. 종합 결론 126
Ⅴ. 참고 문헌 131
Ⅵ Abstract 139
Ⅶ 부록 142
감사의 글 162
