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산업폐기물 매립지의 매립가스 발생특성에 따른 안정화 조사 연구
박동일(Dong Il Park),최석규(Seog Gyu Choi),강동수(Dong Soo Kang),안재동,장인용(In Yong Chang) 한국환경보건학회 1999 한국환경보건학회지 Vol.25 No.1
Stabilization of industrial wastes landfill was investigated, comparing landfill gases(LFG) which were generated from a land site with those from three sets of lysimeter. Lysimeter-packing wastes consisted of 7.2∼17.0 wt.% of combustible component and theoretical gas production rate with their elemental analysis was 0.31∼0.49 ㎥/kg-dry waste. Gas production rate(㎥/kg-dry waste) from lysimeter A, B and C was 0.0009, 0.014 and 0.0067, respectively, and different from each other according to the landfill period of wastes. Applying the Landfill Air Emissions Estimation model of EPA to the landfill site of this research, the production rate of CH_4 is 1.963 × 10 exp(7) ㎥/year in 1998 and reaches to maximum in 2000. Methane and carbon dioxide accounted for 0∼10.2% in gases discharged from gas discharge pipes in the landfill site and were not detected in efflux gases on the landfill surface.
張仁鏞 忠州大學校 1967 한국교통대학교 논문집 Vol.1 No.-
In order to determine the optimun temperature and time for the activation of acid clays, the specific area and preferential properties as index of the adsorbity were carefully studied. In this work the acid clays of Yong-Il Were treated with 20% sulfuric acid of 6 times in weight to the clay. Then the specific area of activated. clay was measured by A. A. I. method, preferential properties by E. A. I. Method, and the adsorbity was checked by S. E. A. I. Method. The optimum activating temperature and time for this work were varied in range of 3-4 hours at boiling point depend on the raw materials used.
교반탱크 내에서 부유물 유체의 열전달에 관한 연구(1)
張仁鏞 건국대학교 부설 산업기술연구소 1987 논문집 Vol.12 No.-
Heat transfer to agitated Newtonian suspensions has been studied in a herical heating coil, 6-flat blade flat turbine impeller, flat-bottomed tank for evaluating the effect of i)impeller speed, ii)properties of solid-liquid suspension, iii) slid concentration, iv) size of particles, v) physical properties of solid and liquid forming the suspension on heat transfer. Experimal data have been obtained for the suspensions of sea sand, copper, iron and zinc powder in water under batch heat transfer conditions. The following dimensionless empirical correlation has been developed from metal powder (copper, iron, zinc) in water (average deviation: ±10%, range of ?? ; ??). ?? and sea sand powder in water. (average deviation: ±13%, range of ?? ; ??). ?? An analysis of the experimental results observed that heat transfer coefficient were increased as well as decreased with the particle characteristics. Comparison of the correlation with other correlations on heat transfer to solid-liquid suspensions shows good agreement.
張仁鏞 건국대학교 1981 學術誌 Vol.25 No.1
Blending times in aerated stirred tanks with different aqueous solutions were measured in the turbulent region near the impeller. From the pH response to a pulse input it was shown that these blending times increased with increasing gas holdup. This phenomenon was more pronounced in solutions with higher viscosities. It can be concluded that the blending efficiency of a stirrer is adversely affected by the interaction between gas bubbles and the eddies which are generated by the stirrer under turbulent conditions.
嫌氣性 固定層 反應器에서 有機城 廢水로 생성된 Biogas의 특성 및 速度論에 관한 硏究
張仁鏞 建國大學校 附設 産業技術硏究所 1992 논문집 Vol.17 No.-
In this study an experimental procedure has been carried out to investigate biogas characteristics produced by treatment of biomass in an anaerobic bioreactor using biological method. Therefore, biogas production and methane contents with C/N ratios, the range of mesophilic and thermophilic temperature, COD concentrations was studied. The first-order reactor model supposed by kinetic study was in good agreement with the experimental results.
張仁鏞,李昌成 忠州大學校 1968 한국교통대학교 논문집 Vol.2 No.-
Active carbon which is produced through various chemical and physical processes, is a porous carbon with tremendous surface area and is a typical adsorption agent that absorbs other materials by a complex physical mechanism. Adsorption, an operation of applying the Active Carbon, is one of the common and important operation of the many chemical engineering Unit Operations. According to their characteristics, the Active Carbons are devided into two classes ; they are gas absorbent, such as sovant adsorption, and the liquid phase absorbent which is used for the refining and decolorization of liquid. Active Carbon for the gas absorbent is mixed with a certain binder and prepared as granular pellets prior to the carbonization proces. In the main process, the carbonization and activation are carried out through two separate processes. The active carbon for this purpose is rather expansive and can be reused by regeneration ofter it has passed through the adsorption operation. On the other hand, that for the adsorbent in liquid is produced as a powder and costs less then former. The powdered active carbon is left with absorbed impurity as a sluage. Therefore it should have the proper range of particle size and particle strength for good filterability.
嬚氣性 固定床 生物反應器에서 담체의 種類에 따른 유기성 폐수의 처리 특성에 관한 연구(Ⅱ)
姜東秀,張仁龍,金正圭 조선대학교 생산기술연구소 1992 生産技術硏究 Vol.14 No.2
In an attempt to develope the packing materials, two types of carriers was investigated in wastewater treatment using an anerobic packed bed bioreactor. The followings are the results of this experiment. 1. Soft stone A as a carriers was superior to soft stone B in biogas production and methane content. 2. Soft stone A enhanced the COD removal efficieucy which was 90% above, and stabilized in volatile acid. 3. The slope of methane production with respect to the removal COD was 0.58㎥ CH₄/㎏ COD for soft stone A, and 0.35 for soft stone B. 4. The result of SEM photographs has shown that a lot of microoganisms are was attached in the soft stone A, and enwrapped it. 5. The mass transfer rate of microoganisrns from the liquid phase to the biofilm surface for soft stone A and B is C_(b)=C_(bo) exp(-0.025Θ_(AF)). C_(b)=C_(bo) exp(-0.034Θ_(AF)) respectively. It was recommened that the effective carriers in wastewater treatment using an packed bed bioreactor in this experiment be soft stone A carriers.