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응집공정과 전산화처리를 이용한 규조류(Stephanodiscus) 및 남조류(Microcystis)의 제거에 관한 연구
임용승 ( Im Yong Seung ),김영진 ( Kim Yeong Jin ),이철우 ( Lee Cheol U ),강임석 ( Kang Im Seog ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.1
Algae in water source causes many problems not only to the quality of treated water, but also to the operation of drinking water treatment processes. Therefore, it is essential to remove algae throughout water treatment process, especially during coagulation and preoxidation process. At coagulation experiment of a different coagulant species for removal algae, Microcystis showed that the removal efficiency was similar to alum, PSO-M, PASS and PAC coagulant. The coagulation efficiency of Stephanodiscus and Microcystis after prechlorination and preozonation treatment was increased the one that than use of only alum coagulant. Therefore circumstances of ozone treatment was prefitable removal efficiency of dissolved organic matter(DOC) and was few production of 1㎛ particles than chlorine treatment. The result of Algogenic Organic Matter (AOM) classification for Stephanodiscus and Microcystis, hydrophilic, humic and fulvic acid component showed each 59%, 26%, 15% and 38%, 36%, 26% order. The result after two day that only Microcystis input in Milli-Q water, DOC released from showed 1.16㎎/L. DOC released from the Microcystis after chlorine and ozone treatment increased to about 15∼62%. Also, According to the rapid sand filter tests after preoxidation processes of Stephanodiscus and Microcystis, the preoxidation process using ozone or chlorine lead to reduce the rate of headloss development and prevent from breakthrough of turbidity than only alum treatment.
김영진(Young Jin Kim),임용승(Yong Seung Im),김용순(Yong Soon Kim),권동민(Dong Min Kwon),신판세(Pan Se Sin) 한국수처리학회 2002 한국수처리학회지 Vol.10 No.2
N/A The formation of disinfection by-products(DBPs) is one of the major issue for drinking water quality control. Whenever raw water or organic compounds extracted from natural water are chlorinated, significant concentrations of Trihalomethanes (THMs) and Haloacetic acids (HAAs) are produced. With recent advances in the analysis of chlorination by-products and their health effects, numerous organic halides HAAs, THMs, haloacetonitriles, etc have been identified at low level. Animal studies have demonstrated that dichloroacetic acid(DCAA) causes carcinogen. Five of HAAs (MCAA, DCAA, TCAA, MBAA and DBAA) are regulated under the U.S Environmental Protection Agency`s proposed Disinfectant/Disinfection By-Products Rule. The goal of this study was to control HAAs contaimed in Pusan`s drinking water. The results obtained from this study are as fellow. 1) HAAs concentrations of H, D, M water treatment plants are 1∼22㎍/l (6.8), 1∼16㎍/l (8.4), 0.4∼16㎍/l (2.6) respectively. This results is very low value comparing to USEPA DBPs Rule of HAAs. 2) HAAs speciation in Pusan`s drinking water is generally in the order : DCAA(41∼51%) > TCAA (23∼38%) > DBAA(18∼30%) > MBAA(2∼5%) > MCAA(O%), which shows DCAA and TCAA were the dominant compounds. 3) HAAs was seen to be decreased rapidly in the sand filter of a water treatment plant. This was caused by the HAAs biodegraded in the sand filter. In addition, HAAs can be removed in the advanced treatment process althought an adsoption of the THMs is gone. 4) From the results of the batch experiment, HAAs was seen to be removed by the biodegradation by microorgarnism in the sand filter. 5) THMs and HAAs in distribution system were 1.3∼1.6. 1.4∼2.1 times higher than in final water in plant, respectively so it can be concluded that the longer distance from the plant, the more concentrations of them.