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2단 활성슬러지 시스템을 이용한 저온에서 하수의 질소제거
정금희,손정희,박종복,이용희 ( Keum Hee Jung,Jung Hee Shon,Jang Bok Park,Yong Hee Lee ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.1
Nitrogen removal study of municipal wastewater was carried out in A City`s Wastewater Treatment Plant with dual sludge system. The dual sludge system consists of anoxic tank, oxic tank, and clarifier followed by Modified Ludzack-Ettinger(MLE) system. For nitrogen removal, methanol was used as an external carbon source in the anoxic tank. This process showed the effluent quality, achieving 81% of COD_(Cr), removal and 71% of total nitrogen removal. Influent wastewater contained 199∼548㎎/l of COD_(Cr), and 51∼83.8㎎/l of total inorganic nitrogen. The final effluent contained 42∼150㎎/l of COD-Cr and 11.2∼33.5㎎/l of total nitrogen. The specific denitrification rate and C/N ratio in the anoxic tank were 0.1∼0.34 (gNO₃-N/gVSS/d) and 3.06∼4.64 (gCOD consumed/gNO₃-N removed), respectively, at the range of 4∼14℃ of temperature.
뇌사환자의 갑상선 기능, 전신대사 및 중증도에 관한 연구
이영주,정금희,왕희정,문봉기,한연희,이영석 아주대학교 의과학연구소 1999 아주의학 Vol.4 No.1
Background and Objectives : Brain death may lead to hormonal depletion, metabolic derangement and multiple organ dysfunction. We have carried out present study to examine the effects of brain death on the thyroid function, metabolic indices, and the severity scoring systems. Methods : 13 adults patients admitted for organ donation or brain death evaluation were examined after brain death was confirmed. Thyroid hormones measured were .thyroid stimulating hormone (TSH), triiodothyronine (T3), thyroxine (T4), and free thyroxine (FT4). The metabolic indices measured were arterial ketone body ratio (AKBR), lactic acid (LA), and base defiat (BD). as for reference to the severity scoring systems, APACHE Ⅲ and multiple organ failure score (MOFS) were assessed on the day of brain death confirmation. Arterial blood was drawn for all measurements. Results : As for the thyroid function, there were significant decreases in T3 (40.48±20.96 ng/dL) and T4 (3.47±2.15 ㎍/dL), but no significant change in FT4 (0.75±0.31 ng/dL) and TSH (1.12±1.37 uIU/mL) compared to the normal range. Significant decreases in AKBR (0.39±0.31) and BD (-9.46±5.83 m㏖/L), and significant increase in LA (2.57±2.46 m㏖/L) In metabolic indices, were shown, as for severity scoring systems, APACHE Ⅲ score (101.54±19.41) and MOF score (9.11±2.57) indicated a high mortality. There were significant correlation between thyroid hormones (r=0.565 -0.781) but no correlation among other indices. Also, significant inverse correlations were shown between base deficit and lactic acid (r=-0.660), APACHE Ⅲ score (r=-0.726) and MOF score (r=-0.604). The highest correlation was observed between APACHE Ⅲ score and MOF score (r=0.851). Conclusions : As for the thyroid function, significant decrease in T3 and T4, and almost normal range of FT4 and TSH imply the euthyroid sick syndrome. Abnormal finding of the metabolic parameters indicates an inhibition of the aerobic metabolic rate of the body as a whole. And the severity scoring parameters are compatible with high mortality.