| Title |
Estimation of Removal Behavior of Microorganisms in Water Treatment Process with Laboratory Scale Test |
| Authors |
염철민 ( Yeom Cheol Min ) ; 조순행 ( Jo Sun Haeng ) ; 정현미 ( Jeong Hyeon Mi ) ; 손진식 ( Son Jin Sig ) ; 박수영 ( Park Su Yeong ) ; 윤제용 ( Yun Je Yong ) |
| Keywords |
HPC; Heterotrophic Plate Counts; Bacillus subtilis; flocculation; sedimentation; filtration |
| Abstract |
The removal behavior of indicating microorganisms, such as HPC (Heterotrophic Plate Counts) and Bacillus subtilis endospore in water treatment process was investigated. Jar and column test were chosen to simulate flocculation/sedimentation. filtration process, and disinfection individually. The 1.7-1.8 log removal of HPC was achieved in flocculation/sedimentation. And 2.5 -2.6 log and 2.8-2.9 log total removal of HPC was reached by combined process of sand filter and dual media filtration process. This result indicates that a good flocculation/sedimentation process is important to acquire a high level of removal of indicating microorganisms. This tendency may be more important for protozoa removal such as Giardia and Cryptosporidium which is much larger in size. In addition, the flocculation/sedimentation/filtration process contributed to the 35 % reduction of CT values required for achieving the inactivation of 2-109 Bacillus subtilis under the same chlorine exposure environment. |