먹는 샘물의 개봉 후 음용과정에서의 보관 조건에 따른 미생물학적 수질 변화
배경선 · 김지혜 · 장준형 · 김정명 · 이원석 · 정현미 · 박상정
†국립환경과학원 상하수도연구과
Change of Microbiological Quality according to Various Storage Conditions in the Drinking Process of Bottled Mineral Water
Kyung-Seon Bae, Jihye Kim, JunHyeong Jang, Jeong Myeong Kim, Wonseok Lee, Hyen-Mi Chung, and Sangjung Park
†Water Supply & Sewerage Research Division, National Institute of Environmental Research
ABSTRACT
Objective: This study was conducted to investigate changes in microbiological quality according to various storage conditions in the drinking process of bottled mineral water.
Methods: Heterotrophic plate counts (21
oC and 36
oC) and pathogenic indicators (total coliforms, fecal Streptococcus, Pseudomonas aeruginosa, Clostridium perfringens, Salmonella, and Shigella) were analyzed in commercial bottled mineral water stored under different conditions (4
oC, 20-25
oC, 36
oC) after injecting saliva.
The heterotrophic plate counts were analyzed twice per day for the first week and once per day for the three weeks after. Pathogenic indicators were analyzed at the beginning and end (initial and final).
Results: The results of the microbiological quality of the bottled mineral water in contact with saliva showed that heterotrophic plate counts (21
oC) had a tendency to be sustained or decrease slightly after 10 days.
Heterotrophic plate counts (36
oC) had a high population in the initial samples and gradually decreased at 4
oC storage, but it remained constantly high in storage at 20-25
oC and 36
oC. In the general drinking condition, the population was slightly higher than the control, but the overall trend was similar.
Conclusions: As a result of the microbiological quality of mineral bottled water in contact with saliva during the process of drinking, heterotrophic plate counts (21
oC and 36
oC) showed a high population compared to the control, which was only opened and not in contact with saliva. In some samples, pathogenic indicators were also detected. Therefore, it is desirable to consume bottled mineral water as soon as possible after opening.
Keywords: Bottled mineral water, hterotrophic plate count, pathogenic indicator
I. 서 론
국민들의 생활수준이 향상되고 건강에 대한 관심 이 높아짐에 따라 최근 사람에게 영향을 미치는 모 든 환경인자들에 대한 불신감이 점차 커지고 있으며
먹는물은 직접 사람이 음용한다는 점에서 더욱 우려 가 커지고 있다. 이러한 문제점 등으로 수돗물에 대 한 불신감이 쌓이게 되고 수돗물보다 더 안전한 먹 는물을 원하는 사람들이 증가하는 등 먹는샘물에 대 한 수요가 급증하고 있는 추세이다.
1)†
Corresponding author: Water Supply & Sewerage Research Division, National Institute of Environmental Research, 42, Hwangyeong-ro, Seo-su, Incheon, Republic of Korea, 22689, Tel: 032-560-8353, Fax: +82-32-563-7085, E-mail: [email protected] Received: 20 November 2017, Revised: 6 December 2017, Accepted: 14 December 2017
원 저 Original articles