We investigated the effect of temperature and pressure in breakthrough performance of various sorbents for dechlorination and desulfurization. Based on the results obtained during the desulfurization (Fe2O3, Fe3O4, ZnO) and the dechlorination (Na2CO3, NaHCO3, trona) screening tests, ZnO and trona were selected as preferred optimum sorbents. H2S breakthrough time corresponds to an effective capacity of approximately 11 g H2S/100 g of sorbent. Also, HCl breakthrough time corresponds to an effective capacity of approximately 5 g HCl/100 g of sorbent. ZnO and trona at high temperature of around 550oC display high sorption performance and removal efficiency for synthsis gas from waste gasification. Although there is an issue of CO2 recovery in hot gas cleanup technology for desulfurization, we have obtained an interesting new alternative hot gas cleanup system with heat budget merit.

The effects of NaCl concentration on bio-hydrogen production and microbial community by dark-fermentation were evaluated. The examined NaCl concentration was varied from 0 to 5%. When NaCl concentration ranged from 0 to 3%, the hydrogen production was insignificantly affected. 4% or more NaCl concentration decreased accumulated hydrogen production and the lag time was longer. In addition, the metabolite pathway of the bacteria were shifted from butyrate to acetate by microbial community changes with high concentration of NaCl. FISH analysis was achieved to analyze the microbial community after the dark-fermentation performance. Hydrogen producing bacteria, Clostridium sp. Cluster I and Cluster XI, was dominated with 0 ~ 3% of NaCl, while Eubacteria, general bacteria, was dominated with 4 ~ 5% of NaCl. Therefore, the growth and hydrogen production of the hydrogen producing bacteria were inhibited with over 4% of NaCl.

Simulated waste-derived synthesis gas has been tested for hydrogen production through water gas shift (WGS) reaction in the temperature range of 240oC ~ 400oC over supported Pt catalysts prepared by an incipient wetness impregnation method. MG30, MgO, ZrO2, Al2O3 and CeO2 were employed as supports for WGS reaction in this study. 1 wt.% Pt/ CeO2 catalyst exhibited the highest CO conversion as well as 100% CO2 selectivity. This is due to easier reducibility of Pt/CeO2 and high oxygen mobility and oxygen storage capacitiy of CeO2. Pt/CeO2 catalyst can be a promising catalyst for WGS reaction from waste-derived synthesis gas.

Odor from sewage treatment plants have the potential to cause significant annoyance and to impact the amenity. In this study, odor emission characteristics at unit process of 48 sewage treatment facilities in 39 plants were evaluated using composite odor concentration and hydrogen sulfide (H2S) concentration. The values of composite odor concentration (geometry mean) and H2S concentration (median) for sludge treatment processes are higher than those for the other treatment processes. The composite odor concentration and H2S concentration are distributed over a wide area in each process. Composite odor concentration (dilution ratio) was found to have the significant correlation with H2S concentration (p=0.000<0.05). The H2S concentration accounted for 67.1% of composite odor concentration.

Destruction and removal efficiency (DRE) of SF6 was tested with low degrees of ionization. The applied dose of ionization energy varied from 63.70 to 212.34 kGy. The initial concentration and flow rate of SF6 gas were 1,000 ppm and 50L/min, respectively. In order to increase the DRE, injection of conditioning agent (H2) were conducted. The DRE of SF6 increased about 2 times with injection of H2 gas.

Article 215 of the Criminal Procedure Act does not limit explicitly the time limit that public prosecutor should request a warrant to seize, search or inspect evidence. But after the public prosecutor filed the charges, he cannot request a warrant by article 215 of the Criminal Procedure Act. After the indictment, the court may seize any articles which, it believes, may be used as evidence, or liable to confiscation, by article 106 of the Criminal Procedure Act. And the court may, if necessary, search the defendant, effects, or dwelling or any other place of the defendant, by article 109(1) of the Criminal Procedure Act. The court may search the person, effects, dwelling or any other place of a person other than the defendant, only when there are circumstances which warrant the belief that there are articles liable to seize therein. If the public prosecutor collected the evidence by a search warrant issued from a district court judge other than the court in charge of the case, those evidence are not admissible in principle, because those collection of evidence does not follow legal procedures, which are prepared for human rights. Supreme Court decided it April 28, 2011, on 2009Do10412 case.