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폐타이어 담체가 충전된 유동상 생물막법을 이용한 도시하수 처리
송준상,문형극,이홍근 ( Jun Sang Song,Hyung Keuk Moon,Hong Keun Lee ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.3
Samkwang Aqua-Clear, Inc. has developed the fluidized bed biofilm method using the SAC Bio-Carrier made of waste tire powder and called Bio-SAC Process. The removal rate of organic matter of this method can treat the wastewater 4 times faster than the conventional activated sludge method and it has specially designed aerobic bio-reactor filled with 20% SAC Bio-carrier of the volume of reactor. We have done the application research for the municipal sewerage treatment and the results are summarized as follows: The removal rate of biochemical oxygen demand(BOD) and chemical oxygen demand(COD-Mn) was around 90% and the Hydraulic retention time(HRT) of the aerobic bio-reactor is 1.5 hours. Although the suspended solids(SS) concentration of raw water was very high and varied widely because this method has no primary sedimentation tank, its concentration of the effluent is only around 10㎎/L. Also nitrification reaction was occurred and the removal rate of total kjeldahl nitrogen(TKN) was around 80% during the short HRT. The removal rate of total phosphorus was around 70% with chemical coagulation process using the alum and polymer. Its rate was higher than that of the conventional activated sludge method. The bio-film microorganism grew abundantly on the surface of the SAC Bio-carrier. Epistylis spp. was observed as a predominant species, and the depth of the biofilm was 0.3∼1.0㎜. This species is one of the peritrichita that grow well in the aerobic reactor at the good treatment condition. The treatment coefficient(T₁) of Bio-SAC^R process from the Grau`s multicomponent degradation model was four times higher than that of the activated sludge method. This SAC treatment method can not only reduced the 50% of the building area of the wastewater treatment plant, but also reduced the 20% of the capital cost. Because the removal rate of the total phosphorus is much higher than the activated sludge method, this treatment method is more effective process as the tool of the prevention method for the point source control of the eutrophication.
송준상,고순순 한국물환경학회 1987 한국물환경학회지 Vol.3 No.1
소독제로 널리 사용되어 온 크레졸은 생물체에 독성을 나타낼 뿐 아니라, 주요한 환경오염물질로 지적되고 있다. 본 연구에서는 o-Cresol을 유일한 탄소원 및 에너지원으로 이용하는 균주를 하천저질, 오염된 하천수, 임야의 토양으로부터 분리 , 동정하고 분리된 각 균주의 대사다양성을 실험하였다. 그리고 각 균주의 호흡률을 구하고, 균주중 호흡률이 가장 높은 균주에 대해o-Cresol의 농도별 분해활성을 실험한 결과를 요약하면 다음과 같다. 1) 총 20개의 시료에서 4주의 o-Creso분해균주가 분리되었는데, 그중 1주는 Acinetobacter SP.에 나머지 3주는 Pseudomonas SP.에 속한 것으로 동정되었다. 2)각 균주는 o-Cresol외에도 각종 탄수화물, 아미노산, 알코올 그리고 Phenol, Salicglate등과 같은 방향족화합물로 탄소원으로 이용할 수 있었다. 3)호흡 측정결과, Straio No, III의 호흡률이 344ng O₂/g·biomass .hr로서 분리된 균주중 가장 높았다. 4) Strain NO. III에 대해서 실시된 분해활성 실험결과, Strain No. III는 84시간 배양동안 o-Cresol 1500㎎/ℓ을 92%까지 분해시킬 수 있는 활성이 우수한 균주임이 밝혀졌다. Cresol has been used as a disinfectant. But this chemical is not only toxic to the biota, but recalcitrant environmental pollutant. This study was carried out to examine the o-cresol biodegradation by isolated strains in nature. The following results were obtained. From twenty samples, 4 strains were isolated. One of the strains, was identified as Acinetobacter sp., the rest were identified as Pseudomonas sp. Each strain showed very different diversity in the substrate utility, as a sole carbon and energy source. Substrates were all 44 kinds including carbohydrates, amino acids, alcohols and other aromatic compounds. In the measurement of respiration rate by each strain, strain No. III was an excellent degrader in respiration rate as 344ng O₂/g·biomass·hr. In the test of biodegradation activity, strain No. III degraded o-cresol-1500 ㎎/ℓ of 92 percent for 84 hr.
우리나라에서 分離한 腸티브스菌에 對한 抗菌劑 感受性 調査硏究
宋準相 서울大學校保建大學院 1976 公衆保健雜誌 Vol.13 No.2
The antimicrobial susceptibility tests with ampicillin (AM), chloramphenicol (CM), colistin (Co), gentamycin (GM), kanamycin (KM), neomycin (NM), streptomycin (SM), tetracycline and trimethoprim/sulfamethoxazole (TS) were performed to 121 cultures of Salmonella typhi isolated in various parts of Korea during the period from February to December, 1975. Single disc method and MIC and MCC by the tube dilution method were performed in this experiments and the results obtained were summarized as follows: 1. The distibution of susceptible cultures tested by the single disc method to the various antimicrobial agents were as follows: AM: 92.6%, CM: 99.2%, Co: 76.0%, GM: 99.2%, KM: 99.2%, NM: 96.7%, PG: 44.6%, SM: 61.0%, TM: 37.2%. 2. The distribution of susceptible cultures tested by the MIC method to the various antimicrobial agents were as follows: AM: 85.3%, CM: 93.4%, Co: 91.7%, GM: 94.2%, KM: 85.3%, NM: 100%, PG: 52.9%, SM: 43.8%, TM: 37.2%, TS: 100%. 3. The distribution of the cultures within the range of susceptibility by the determining MCC to subculture to the various antimicrobial agents were as follows: AM: 78.5% CM: 45.5%, Co: 72.7%, GM: 80.2%, KM: 33.9%, NM: 97.5%, PG: 33.1%, SM: 2.5%, TM: 7.4%, TS: 89.3%. 4. The somparison between the Antimicrobial susceptibility tests employing single disc and MIC method were performed and their agreements were as follows: AM: 92.6%, CM: 94.2%, Co: 81.0%, GM: 95.0%, KM: 84.3%, NM: 96.7%, PG: 78.5%, SM: 74.4%, TM: 86.0%. 5. The Bactericidal action of the various antimicrobial agents appeared in following times concentration than MIC. AM: 1.9 times (SD: 1.30), CM: 3.9 times (SD: 1.33), Co: 2.2 times (SD: 1.62), GM: 2.1 times (SD: 1.29), KM: 4.5 times (SD: 3.74), NM: 2.2 times (SD: 1.47), PG: 2.2 times (SD: 2.24), SM: 4.6 times (SD: 3.64), TM: 3.8 times (SD: 3.06), TS: 2.5 times (SD: 1.54).