Microcystis sp. Cell의 부패와 염소 소독부산물 생성

Formation of disinfection by-products (DBPs) including trihalomethans (THM), haloacetic acid (HAA) and haloacetonitriles (HAN) from chlorination of extracellular organic matter (EOM) and cells + intracellular organic matter (IOM) of Microcystis sp., a blue-green algae, during decomposed period was investigated. Microcystis sp. cells + IOM and EOM of Microcystis sp. exhibited a high potential for DBP formation. HAAFP (formation potential) was higher than THMFP during decomposed period. In the variations of HAAFP species during decomposed period, the ratio of di-HAAFP species was gradually decreased and the ratio of tri-HAAFP species was gradually increased in the case of EOM during decomposed period, while the opposite result was in the case of cells + IOM during decomposed period. In the variations of HANFP species during decomposed period, the ratio of di-HANFP species was much higher than the ratio of tri-HAAFP species. Microcystis sp.의 부패과정에서 수중으로 용출되는 AOM 특성과 염소 이들에서의 disinfection by-products (DBPs) 생성특성을 조사하였다. 수중으로 용출된 EOM과 cell + IOM에서의 염소 DBPs 생성특성을 조사한 결과, EOM은 보관기간 초기부터 지속적으로 증가하였으나 cell + IOM의 경우는 급격한 감소경향을 나타내었으며, 생성된 DBPs 중 HAAFP가 가장 높은 생성비율을 나타내었다. 또한, 이 때의 DBP 구성종들의 변화를 살펴본 결과, HAA 구성종들의 경우는 EOM에서는 di-HAA 구성종들의 비율은 점점 감소하였고 tri-HAA 구성종들의 비율은 점점 증가하였다. 그러나 cell + IOM의 경우는 EOM의 경우와는 반대 경향을 나타내었다. 또한, HAN 구성종들의 경우는 EOM과 cell + IOM 모두 di-HAN 구성종들의 생성비율이 월등히 높았다.