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반순환여과장치에서 무지개송어의 적절한 사육밀도와 수질환경조건
윤종만,박홍양,장계남,전태성 ( Jong Man Yoon,Hong Yang Park,Kye Nam Chang,Tae Sung Jun ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.2
This experiment was carried out for the determination of the optimal breeding density of rainbow trout(Oncorhynchus mykiss) and environmental conditions in semi-closed recirculation system. Since under the conditions of various research programmes, comparable trout origins rank differently, it must be supposed that genotype-environment interaction can occur under different stress situation (e. g. different density/PVC rearing unit). Thus, control of test environment of utmost importance both for performance testing and for breeding decisions. The recirculation system consists of 35 single PVC-cylinder with a water volume of 80 litre, respectively. In this experiment water renewal was lOm^3/day and density 75∼400 fries or fingerlings in each cylinder. The concentration of ammonia, nitrite, nitrate, and pH were measured weekly during the experiment . The final fish: water ratio was 1: 18.6(or 150kg live body weight per 2.8m^3 water), Water temperature(9±1˚C), the values of pH(7.3∼7.8), the concentration of ammonia(0.1∼1.Oppm), nitrate(15∼20ppm), total nitrogen(8.7∼9.8ppm), and phosphate(0.3∼2.Oppm) were within the safe range. The feed efficiency was better than any other domestic animal and was 1.46. The mortality was 5.6%, and the optimal stocking density was considered to be 200fish/cylinder It can be concluded that the breeding experiments implemented at the aquacultural test station, except for the beginning phase of each test, have not been affected by environmental factors.
조병렬 ( Byung-yeol Cho ),전태성 ( Tae-sung Jun ),연익준 ( Ik-jun Yeon ) 한국환경기술학회 2006 한국환경기술학회지 Vol.7 No.3
본 연구에서는 고농도 질산성질소를 포함하는 NaNO<sub>3</sub> 합성 모의용액을 만들어 Psudomonas halodenitrifications sp. nov.를 이용하여 아세트산을 탄소원으로 하여 미생물에 의한 탈질과정에서 pH, 온도, 질산성질소 농도 및 기질과 전자공여체의 비 등을 변수로 하여 탈질현상을 관찰하였으며 이를 바탕으로 폐기물의 미생물을 이용한 탈질처리에 대한 가능성을 검토하였다. 생물학적 탈질을 이용하여 고농도 질산성 질소를 함유한 산업폐기물의 처리가 가능 가능하였고, 고농도의 NaNO<sub>3</sub>에 의한 저해현상은 없었고, 미생물의 성장과 안정성을 고려할 때 바람직한 운전 조건은, pH는 6.5∼8.5, 온도는 300℃ 부근, acetic acid/nitrate 비율 1.2 부근이 바람직한 것으로 나타났다. This study is a biodenitrification for synthetic industrial waste with high concentrated sodium nitrate using Psudomonas halodenitrifications sp. nov. The experiment carried out biodenitrification using carbonaceous substrate from acetic acid in batch reactor under various experimental conditions such as pH, A/N(acetic acid/nitrate) ratio, temperature, rpm and concentrations of nitrate etc. It was found the possibility that biodenitrification is able to denitrify the industrial waste included with high concentrated sodium nitrate solution. Optimal conditions for cell growth and biodenitrifications were as follow; pH range; 7.5-8, Temperature; 30℃, Acetic acid/Nitrate ratio; 1.0, rpm; above 20, respectively.
철 전기분해 장치를 이용한 SBR공정에서 인 제거에 관한 연구
이호식 ( Ho Sik Lee ),송대현 ( Dae Hyeon Song ),전태성 ( Tae Sung Jun ) 한국수처리학회 2011 한국수처리학회지 Vol.19 No.3
The purpose of this study was to remove an phosphorus ion using iron electrolysis device in a sequential batch reactor(SBR) and to analyze the effect phosphorus efficieny. Iron electrolysis device was applied to SBR process plant which is appropriate to the processing facilities of small scale and which is excellent in disposal capacity about flux change of 60㎥/day flowed real sewage. It was designed in a fashion that the output voltage of iron electrolysis device was 12V, current density was 3mA/cm2, interval of iron plate module was 1.3cm, size of iron plate module 40cm×40cm, and number of iron plate module was 6set. It was operated in the aerobic process. When the iron was used, the nitrogen remove efficieny increased from 71.6% to 75.2% and phosphorus increased from 81.5% to 91.4% respectively. Especially, BOD, CODMn, SS, T-N, and T-P of process efficiency increased about 2.2%, 6.1%, 2.0%, 18.3%, and 24.8% respectively when iron electrolysis device was used. This result concluded that iron electrolysis device compensates the decline of biographical process efficiency because of the decline of microorganism activity.
하수처리시설에서 인 고도처리를 위한 자동제어시스템 개발에 관한 연구
김선국 ( Seon Gok Kim ),이호식 ( Ho Sik Lee ),전태성 ( Tae Sung Jun ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.2
It has a limitation to satisfy the phosphorus effluent criteria of 0.2 mg/L which will be reinforced from 2012 with the Biological Nutrient Removal (BNR) process. The chemical coagulation process has been operated in parallel with the biological treatment process for advanced treatment of phosphorous in the developed countries including Europe. However, the coagulation process has some disadvantages such as the desired goal may not be achieved without injecting the optimum dosage of the coagulant. This study developed the automatic control system to inject the optimum dosage of phosphorous coagulant into the coagulation process. The adopted coagulant was 10% Poly Aluminum Chloride (PAC) in this study. The automatic control system developed in this study was adopted for the treatment of the phosphorus from the effluent in SBR process. The automatic control system was composed of the data receiving part, the optimum coagulant dosage control part and the data transmit part. The result of the phosphorous advanced treatment of the SBR effluent using the automatic control system showed the removing efficiency over 95% consistently with the phosphorous concentration under 0.02~0.15 mg/L. The reproducibility analysis for checking the safety of automatic control system showed more than 95% correlation.