이유체 벤츄리형 선회 노즐이 장착된 제트 루프 반응기에서 합성폐수 중의 암모니아 제거특성

노다지; 윤찬수; 임준혁; 원용선; 이태윤; 이제근; Da-ji Noh; Chan-Su Yun; Jun-Heok Lim; Yong-Sun Won; Tae-Yoon Lee; Jea-Keun Lee

Clean Technology, Vol.23, No.2, 205-212, June, 2017

DOI10.7464/ksct.2017.23.2.205 Export Citation

이유체 벤츄리형 선회 노즐이 장착된 제트 루프 반응기에서 합성폐수 중의 암모니아 제거특성

Characteristics of Ammonia Removal from a Synthetic Wastewater in a Jet Loop Reactor with a Two-fluid Venturi-type Swirl Nozzle

노다지, 윤찬수, 임준혁¹, 원용선¹, 이태윤, 이제근^†

부경대학교 환경공학과, 48513 부산광역시 남구 용소로 45
¹부경대학교 화학공학과, 48547 부산광역시 남구 신선로 365

Da-ji Noh, Chan-Su Yun, Jun-Heok Lim¹, Yong-Sun Won¹, Tae-Yoon Lee, and Jea-Keun Lee^†

Department of Environmental Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Korea
¹Department of Chemical Engineering, Pukyong National University, 365 Sinseon-ro, Nam-gu, Busan 48547, Korea

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초록

본 연구에서는 합성폐수로부터 암모니아 탈기 시 이유체 벤츄리형 선회 노즐이 장착된 제트 루프 반응기의 성능을 평가하고자 하였다. 이를 위해 이유체 벤츄리형 선회 노즐과 일반 노즐이 장착된 각각의 제트 루프 반응기를 이용하여 조업조건 변화에 따른 암모니아 제거효율과 총괄물질전달계수(KLa)를 각각 얻은 후, 이를 통해 성능을 비교하였다. 운전변수로는 pH(pH = 10-12), 액체순환유량(QL = 25-35 L min-1), 공기유입량(QG = 5-20 L min-1)을 변화시키며 실험하였다. 실험결과, 동일한 조업조건에서 이유체 벤츄리형 선회 노즐(two-fluid venturi-type swirl nozzle, TVSN)이 장착된 제트 루프 반응기가 이유체 벤츄리형 일반 노즐(two-fluid venturi-type conventional nozzle, TVCN)이 장착된 제트 루프 반응기보다 암모니아 제거효율과 KLa가 높게 나타났다. 이와 같은 결과는 이유체 벤츄리형 선회 노즐이 장착된 제트 루프 반응기에서 형성된 선회류 흐름에 의해 난류강도가 이유체 벤츄리형 일반 노즐이 장착된 제트 루프 반응기에 비해 높기 때문이라 판단된다. 또한, 실험조건 범위에서 KLa는 pH, 공기유입량 및 액체순환유량이 증가할수록 증가하는 경향을 보였으며, 특히, 실험변수 중 공기유입량이 pH나 액체순환유량에 비해 KLa에 미치는 영향이 큰 것으로 나타났다.

We investigated the performance of a jet loop reactor (JLR) with the two-fluid venturi-type swirl nozzle (TVSN) during experiment for ammonia removal by air stripping from a synthetic wastewater, and compared it with that of a JLR with the two-fluid venturi-type conventional nozzle (TVCN), with the variation of pH, liquid circulation rate (QL), and air flow rate (QG). Their performance levels were compared based on the ammonia removal efficiency and overall mass transfer coefficient (KLa). Investigated parameters in a JLR were pH (10-12), air flow rate (QG = 5-20 L min-1), and liquid circulation rate (QL = 25-35 L min-1). Throughout the experiment, the ammonia removal efficiency and KLa in a JLR with TVSN was higher than in a JLR with TVCN. This may be due to the enhanced turbulent intensity by swirling flow formed in the JLR with TVSN compared to that with TVCN. Further, we obtained higher KLa when pH, QL and QG were increased. In particular, KLa was increased more efficiently by increasing QG than by increasing pH and QL.

Keywords:Jet loop reactor;Ammonia removal;Air stripping;Two-fluid venturi-type nozzle;Overall mass transfer coefficient

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[2] Lee BJ, Cho SH, J. Korean Soc. Environ. Eng., 24(2), 219 (2002)

[3] Yoon AH, Park NB, Bae JH, Jun HB, Kwon YB, J. Korean Soc. Water Wastewater, 24(6), 763 (2010)

[4] Oh DY, Jenog JY, Choi WH, Park JY, J. Korean Soc. Water Wastewater, 25(4), 503 (2011)

[5] Yoon T, Lee G, Jung B, Han Y, Sung N, Clean Technol., 17(4), 363 (2011)

[6] Jafarpour MM, Foolad, Mansouri MK, Nikbakhsh Z, Saeedizade H, World Academy of Sci., Eng. and Technol, 4(10), 481 (2010)

[7] Na, C. K., and Song, M. K, J. Korea Soc. Waste Manag., 31(5), 487 (2014)

[8] Shin SY, Koo BH, Kim TH, Lee YH, Ahn JH, J. Korean Soc. Water Environ., 30(5), 486 (2014)

[9] Yuan MH, Chen YH, Tsai JY, Chang CY, Process Saf. Environ. Protect., 102, 777 (2016)

[10] Bohner K, Blenke H, Verfahrenstechnik, 6, 50 (1972)

[11] Kang DY, Lim JH, Lee TY, Lee JK, Korean J. Chem. Eng., 32(11), 2342 (2015)

[12] Cha GE, Kim MR, Lee JK, J. Korea Soc. Waste Manag., 30(8), 923 (2013)

[13] Kang DY, Kim MR, Lim JH, Lee TY, Lee JK, Korean Chem. Eng. Res., 54(1), 101 (2016)

[14] Cha GE, Sung HJ, Lim JH, Lee TY, Lee JK, Korean J. Chem. Eng., 31(4), 701 (2014)

[15] Meseguer-Lloret S, Molins-Legua C, CampinsFalco P, Int. J. Environ. Anal. Chem., 82(7), 475 (2002)

[16] Deg˘ermenci N, Ata ON, Yildız E, J. Ind. Eng. Chem., 18(1), 399 (2012)

[17] Nugroho DH, Adisalamun, Machdar I, Proc. 5th Sriwijaya International Seminar on Energy, Environ. Sci. and Technol., 1(1), 102-108 (2014).

[18] Capodaglio AG, Hlavinek P, Raboni M, Revista Ambiente & Agua, 10(3), 481 (2015)

[19] An JS, Lim JH, Back YJ, Chung TY, Chung HK, J. Korean Soc. Environ. Eng., 33(8), 583 (2011)

[20] Prasad KY, Ramanujam TK, Can. J. Chem. Eng., 73(2), 190 (1995)

[21] Jain DK, Patwari AN, Khan AA, Bhagawantha RAO M, Can. J. Chem. Eng., 68(6), 1047 (1990)