Browse > Article
http://dx.doi.org/10.33768/ksue.2018.18.4.473

Improvement of Nitrification Efficiency by Activated Nitrifying Bacteria Injection at Low Temperature  

Lim, Dongil (Department of Convergence Technology, Graduate School of Venture, Hoseo University)
Kim, Younghee (Department of Convergence Technology, Graduate School of Venture, Hoseo University)
Publication Information
Journal of the Korean Society of Urban Environment / v.18, no.4, 2018 , pp. 473-483 More about this Journal
Abstract
In this study, we have developed a lab scale bioreactor to identify the characteristics of nitrification reaction according to operation condition (temperature, inhibitor (as Cl), activated nitrifying bacteria (ANB). etc) to improve nitrification efficiency at low temperature. Recovery rate of nitrification took about 4 days to reach the normal level by injected ANB after inhibition shock of CI injection at $20^{\circ}C$, when measured the concentration of $NO_2{^-}-N+NO_3{^-}-N$ in the effluent. In the case of $10^{\circ}C$, recovery of nitrification rate took about 4 days to reach the level of half to the normal level and 7 days for complete recovery which took 3 days more than those at $20^{\circ}C$. At $10^{\circ}C$ considering the winter season, the specific nitrification rate(SNR) of the from 1 day to 6 days after injected ANB according to its operation condition increased from 0.029 to 0.767 mgN/gSS/hr. The simulated SNR for the 8th day after the injected ANB at $10^{\circ}C$ was 0.840, 3.625 mgN/gSS/hr, respectively as linear function and exponential function, expecting to exceed level of 2.592 mgN/gSS/hr at normal condition. It was confirmed that injection of ANB during low temperature operation has many effects for improving nitrification efficiency through this study. In future studies, if further studies are carried out the determination of ANB injection and the design of efficient ANB reactor considering the changes of operating characteristics by site, it will contribute to the improvement of nitrification efficiency in winter season.
Keywords
Nitrification; Activated nitrifying bacteria (ANB); Nitrification rate; Specific nitrification rate (SNR); Winter season; Inhibitor (as Cl);
Citations & Related Records
연도 인용수 순위
  • Reference
1 Um, C. Y., Chu, K. H., Yun, Z. H., Choi, I. H., Park, J. Y., Lee, H. S., and Ko, K. B., "Evaluation of Korean Water Quality Standards in Winter by Characteristics and Statistical Analyses of the Effluent Water Quality at the Sewage Treatment Plants in Korea," Journal of Korean Society on Water Environment, 27(4), 523-532 (2011).
2 US. EPA. "Manual Nitrogen Control, EPA/625/R-93/010," U.S. Environmental Protection Agency. Washington, DC. (1993).
3 Kim, J. S., "A study on the correlation between control factors and denitrifiers in a full-scale denitrifying upflow fluidized bed reactor (FBR)," Ph. D. Dissertation, Seoul National University, 1-3 (2014).
4 Kim, J. T., "A Study on Strengthening Option of T-N Effluent Water Quality Standards of Sewage Treatment Plants," Journal of Korean Society on Water Environment, 34(2), 216-225 (2018).
5 Nam, G. Y., "A Study on Biokinetic Parameter of Nitrification and Denitrification using Microorganism Immobilization Media," Master's Thesis, University of Seoul, 10-11 (2018).
6 Lim, J. Y. and Kil, K. I., "A Study of RCSTP Nutrient Removal Efficiency in Winter Season," Journal of Wetland Research, 16(3), 363-370 (2014). [Korean Literature]
7 Kil, H. K. and Kang, S. H., "A Study on the NBOD Reduction in Wastewater Treatment Plant using Sludge Reaeration During Winter Season," Journal of the Korean Society of Urban Environment, 16(2), 207-213 (2016).
8 Kim, D. H., The Study for improving nitrification rate using rejection water, Master's Thesis, Korea University, pp. 1-2 (2013). [Korean Literature]
9 Ahmed, A. M. and Ibrahim, A. A., "An Energy Integration Approach on UHDE Ammonia Process," World Acad. Science, Engi. Tech., 6, 1705-1711 (2012).
10 Randall, C. W., Barnard, J. L., and Stensel, H. D., "Design and retrofit fo wastewater treatment plants for biological nutrient removal," Water Quality Management Library, 5, Technomic Publishing Company, Inc., Lancaster, PA. (1992).
11 Lee, U. G., "A Study on Optimum Operating Condition for Efficient nitrogen Removal at WWTP in Winter Days," Master's Thesis, Seoul National University of Technology, 1-2 (2006).
12 Roh, S. H. and Kim, S. I., "Effects of External Carbon Source Dosage and Temperature in the SBR Process," Theories and Applications of Chem. Eng., 10(2), 1693-1696 (2004).