질산성질소의 내생탈질기작을 이용한 하수내 영양소 제거에 관한 실험적 연구

박명균; 안원식; 이의신; 허용록; 박종복

Clean Technology, Vol.8, No.2, 77-83, June, 2002

Export Citation

질산성질소의 내생탈질기작을 이용한 하수내 영양소 제거에 관한 실험적 연구

Experimental study of Nutrient Removal by Endogeneous Nitrate Respiration (ENR) Mechanism in domestic wastewater

박명균, 안원식, 이의신, 허용록, 박종복

초록

본 연구는 국내하수처리장에서 발생되는 하수내 질소와 인을 생물학적 영양소 제거공정을 이용하여 효율적으로 처리할 수 있는 설계 및 운전기술을 정립하는데 목적을 두고 있다. 혐기조 전단에 설치한 내생탈질조(Endogenous nitrate respiration, ENR)는 외부탄소원 없이 내생으로 반송슬러지내 포함된 질산성질소를 연속적으로 탈질시켜 질산성질소를 3mg/L 이하로 줄여 혐기조로 이송시킨다. 공정에 대한 성능 실험은 파이롯에서 수행하였다. 실험결과 운전기간동안 유입수내 TCOD/TP 비는 40에서 60범위를 보였고 TCOD/TKN 비는 5~7을 유지하였다. 유출수는 총질소는 10에서 12mg/L을 유지한 반면 총인은 최저 1mg/L을 가리켰다. 혐기조에서 SPrel/SCODrm는 0.13에서 0.17을 유지하였다. 실험실규모에서는 ENR 반응률을 산정하였는데 0.042에서 0.057gNO3-N/gMv.d.를 보였다. 이들 인자들은 생물학적 영양소제거공정을 설계하는데 유용하게 이용될 수 있고 ENR 반응은 저농도 하수에서 질소, 인 처리시 효과적임을 알 수 있었다.

The purpose of this study is to develop the efficient nutrient removal process and to verify operation and design parameters in domestic sewage. Endogenous nitrate respiration (ENR) was used for denitrification of nitrate in return sludge without additional organic carbon source. ENR reactor before the anaerobic tank enable to reduce nitrate below 3 mg/L and increase phosphate release at anaerobic reaction. Primary effluent during pilot scale plant were shown as TCOD/TP ratio of 40~60 and TCOD/TKN ratio of 5~7. Effluent concentrations were 10 to 12mg/L as TN and 1mg/L as TP respectively. In lab scale experiments endogenous denitrification rate of ENR reactor ranges from 0.042 to 0.057gNO3-N/gMv.d. SPrel/SCODrm was shown as from 0.13 to 0.17 in anaerobic reaction. These kinetic parameters are expected to be available for BNR(Biological Nutrient Removal) plant design and ENR reaction is available for nutrient removal in low strength wastewater.

[References]

국립환경 연구원: "하수도시설 개축 및 기능개선 전략 연구," 2차년도 보고서 (1998)
Hatwig P, Water Sci. Technol., 26, 2241 (1992)
Shin HS, Park MG, Jung JY, Environ. Technol., 22, 889 (2001)
"Performance Characteristics of BNR Systems for Low Strength Municipal Wastewater,", Ph.D. Dissertation (1995)
Al-Ghusain IA, "Occurrence and Utilization of Endogenous Nitrate Respiration in Wastewater Treatment Process," Ph.D. Dissertation (1990)
"Process Design Manual for Nitrogen Control," U.S. EPA, Office of Technology Transfer, Washington, D.C. (1993)
Burdick CR, J. Wat. Pullut. Control, 54(7), 1078 (1988)
Nakajima J, Water Sci. Technol., 23(4-6), 709 (1991)
Standard Method for the Exam. of Water and Wastewater, 18th (1992)
Clifford W, "Design and Retrofit of Wastewater Treatment Plants for Biological Nutrient Removal," Water Quality Management Library, 5 (1992)
Pitman AR, "Practical Experience with Biological Phosphorus Removal Plants in Johannes-burg, in Phosphate Removal in Biological Treatment Processes," Wiechers, H.N.S., Pergamon Press, 233-259 (1983)
Tasli N, Water Sci. Technol., 35(1), 75 (1997)

[1] 국립환경 연구원: "하수도시설 개축 및 기능개선 전략 연구," 2차년도 보고서 (1998)

[2] Hatwig P, Water Sci. Technol., 26, 2241 (1992)

[3] Shin HS, Park MG, Jung JY, Environ. Technol., 22, 889 (2001)

[4] "Performance Characteristics of BNR Systems for Low Strength Municipal Wastewater,", Ph.D. Dissertation (1995)

[5] Al-Ghusain IA, "Occurrence and Utilization of Endogenous Nitrate Respiration in Wastewater Treatment Process," Ph.D. Dissertation (1990)

[6] "Process Design Manual for Nitrogen Control," U.S. EPA, Office of Technology Transfer, Washington, D.C. (1993)

[7] Burdick CR, J. Wat. Pullut. Control, 54(7), 1078 (1988)

[8] Nakajima J, Water Sci. Technol., 23(4-6), 709 (1991)

[9] Standard Method for the Exam. of Water and Wastewater, 18th (1992)

[10] Clifford W, "Design and Retrofit of Wastewater Treatment Plants for Biological Nutrient Removal," Water Quality Management Library, 5 (1992)

[11] Pitman AR, "Practical Experience with Biological Phosphorus Removal Plants in Johannes-burg, in Phosphate Removal in Biological Treatment Processes," Wiechers, H.N.S., Pergamon Press, 233-259 (1983)

[12] Tasli N, Water Sci. Technol., 35(1), 75 (1997)