재처리수 관개후 지표미생물의 농도변화 조사
Investigation of Indicator Microorganism Concentrations afterReclaimed Water Irrigation in Paddy Rice Pots
1
조회
0
다운로드
2
인용
0
참고문헌
초록
Abstract
A study was performed to examine the effects of reclaimed-water irrigation on microorganism concentration in ponded-water of paddy rice plots. Several treatments were used and each one was triplicated to evaluate the change of indicator microorganisms (total coliforms (TC), fecal coliforms FC), and E. coli) concentrations in 2003 and 2004 growing seasons. Their concentrations increased significantly right after irrigation, but decreased about 45% in 24 hours. It implies that agricultural activities such as plowing and fertilizing should be practiced one or two days after irrigation considering health-risks. Treatments with UV-disinfected water irrigation demonstrated significantly lower concentrations than others including control plots where natural surface water was irrigated. The monitoring results from actual paddy rice fields and experimental paddy plots showed that concentrations of indicator microorganisms ranged from 102 to 105 MPN/100mL. A comprehensive assessment of existing agricultural practices and a thorough monitoring in the field as well as treatment-plots are recommended to make more realistic national guidelines more applicable. UV-disinfected water irrigation reduced microorganism concentrations in paddy fields down to below the concentration of conventional paddy rice culture, and is thought to be an effective and feasible measure for agricultural reuse of secondary effluent.
참고문헌 (14)
- "Standard Methods for the Examination of Water and Wastewater 19th Ed" (1995)
- "Evaluation of the WHO nematode egg guidelines for restricted and unrestricted irrigation.", 33(10-11), pp.277~283 (1996)
- "Surface water-quality modeling" (1997)
- "The epidemiology of enteric infections in agricultural communities exposed to wastewater irrigation: perspectives for risk control.", 8, pp.203~213 (1998)
- "Disinfection and reactivation of microorganisms after UV irradiation for agricultural water reuse of biofilter effluent.", 45(7), pp.94~106 (2003)
- "The Water Quality Reports of Wastewater Treatment Plant." (2003), Ministry of Environment (M.O.E.).
- "A review of policy and standards for wastewater reuse in agriculture: a Lain American perspective", pp.15~18
- "Report of application for wastewater reclamation and reuse(SWRRC)", 4-5, pp.1~ (2002)
- "UV disign: Comparison of probabilistic and deterministic design approaches", 33(10-11), pp.251~260 (1996)
- "J. A. 1987. Principles of Surface water quality modeling and control. Harper & Row"
- "USEPA. 1992. Manual - Guidelines for water reuse. US EPA", 625[DOI]
- "Guidelines for the microbiological quality of treated wastewater used in agriculture recommendations for revising WHO guidelines: Special Theme- Environment and Health." (2000)
- "Feasibility study of natural systems for sewage treatment and agricultural reuse.", 45(6), pp.194~206 (2003)
- "Reuse of reclaimed water for irrigation on paddy rice culture and its effect.", 44(7), pp.12~14 (2002)