중국의 2012년도 가정용 음식물처리기 수입 시장 규모는 1억호 이상의 가정 중 1%에도 못 미치는 보급률에도 불구하고 약 2400만 달러로, 현재까지는 가정용음식물 쓰레기에 대해서는 특별한 규제가 없으며 정부의 수거 및 재활용 계획이 일부 시범지역에 국한되어 있었으나 점차 확대될 전망으로 향후 큰 시장잠재력을 가지고 있음. 선호 가격대와 타겟에 대한 분석 이후, 분리수거가 활성화된 지역 중심으로 중국 하수관거의 특징 등을 고려한 기술을 채택한 제품을 개발하여 진출하는 것이 바람직함

In this study, we aim at the workplace which is report target about person who emits much food waste, apartment house and detached house. We respectively selected 3 places in this study. Density of average complex bad odor which is generated in storage container of food waste appears high in order of workplace(2,523.8 OU/m3), apartment house(2,135.7 OU/m3) and detached house(1,556.5 OU/m3). And then, it doesn’t seem like big difference. However, these appear degree of bad smell intensity which is more than 3. Meanwhile, bad smell intensity about 3 same occurrence sources which are classified (three places which are respectively workplace, apartment house and detached house)appears big difference. Therefore, we must completely follow the meter-rate system of food waste to reduce the bad smell intensity of storage container of food waste. Also, we must use verified products in order that quality of exclusive storage container prohibits leakage of bad odor. And then, we must periodically clean the storage container and sterilize it. In addition, when we discharge food waste, we must decrease moisture content to squeeze included water. Also, we must make an effort to reduce storage period , as much as possible. And then, it is necessary to prepare countermeasure about this.

The objective of this study is to investigate partial oxidation of NO with desulfurization in dry sorbent injection(DSI) process using dry sorbent and additives. The effect of the main operating variables directly related to desulfurization efficiency has been also tested. These variables are Ca/S ratio, temperature, inlet SO2 concentration and gas flow rate. The experiment was carried out for partial oxidation of NO with desulfurization in dry sorbent injection process using NaClO2 and CaCl2. The experimental results showed that partial oxidation of NO with desulfurization was increased in DSI process using little NaClO2. It was also found that the injection of CaCl2 was effective in increasing only SO2 removal efficiency. Increase of SO2 removal performance and promotion of partial oxidation of NO using the two additives at low temperature was confirmed.

This study evaluated the concentration(OU/m3) of a complex odor being discharged from tire, feedstuff, bakery, paper, casting and painting manufacturing process, correlation between odor concentration(OU/m3) and the odor sensor was investigated. 4 type(A, B, C, D) gas sensors of metal oxide compounds are used in this study. Each odor sample of manufacturing process is diluted with odorless air and diluted odor samples were prepared for five different concentrations. Correlation results(R) of odor sample of tire, feedstuff, bakery, paper manufacturing process ware 0.86~0.99, and odor sample of casting, painting manufacturing process ware more than 0.93. Thus the odor concentration(OU/m3) evaluation by odor sensor was to determine the possible. In particular odor sensor B and D are likely to be effective for evaluation of odor concentration. However, odor samples before evaluation is needed the calibration process depending on the field odor sample to field apply.

Quality management system(QMS) made by international standard organization(ISO) for the testing and analysis bodies is increasingly required when countries trade their goods according to global trade regulations. This paper mentioned how to build the quality management system on domestic environmental measurement institutions and international trends on global environmental market. A conformity assessment system corresponded with the global standard and regulations has sharply been on the rise in all industrial fields as well as the environmental markets. Accordingly we should construct an appropriate QMS operation to promote analysis precision and spreading to all industrial sectors in order to survive on rapidly changing the current tendency of the times. Through this way, we can have global competitiveness. Especially, the settlement of a systematic and scientific quality assurance system is the key subject from the environmental analytical bodies to every societal industrial institutions.

Most small laundry factory has been operated without not only environmental expertise but also technical process. The objective of this study is to get the optimal coagulation dosage for satisfaction of discharge permission standard of laundry wastewater treatment plant(WTP) effluents by jar test.The coagulants are alum and sodium hydroxide(NaOH), coagulants aids is polymer. Also, the best coagulation reaction was shown in the following conditions ; Alum 4.13g/L, NaOH 1.03g/L, Polymer 0.27g/L on average. The optimal coagulation dosage could be reduced costs to 4.43 million won a year. It was considered that operating a small WTP was an important technical data in same industry.

The purpose of this study is to provide the data for sewage policy by selection of demending section and priority for interceptor renovation in Daejeon Metropolitian City. The order of priority for interceptor renovation in this city is Daejean-cheon, Youdeng-cheon, Gab-cheon, Youseong-cheon and Jinjam-cheon. Length of demanding section for renovation is 5.6 km for Daejean-cheon, 11.9 km for Youdeng-cheon, 13.8 km for Gab-cheon, 10.4 km for Youseong-cheon, and 3.9 km for Jinjam-cheon, respectively. The total length for interceptor renovation is 45.6 km. Assuming 30% as partial repair and 70% total repair on trenchless replacement, total renovation cost is calculated 98.2 billion won, 3.5 billion won for Daejeon-cheon, 1.2 billion won for Jinjam-cheon, 49.7 billion won for Gab-cheon, 4.3 billion won for Youseong-cheon, and 39.5 billion won for Youdeng-cheon.

The purpose of this sudy is to get characteristics of water quality in separated sewer overflows. In dry weather the water quality of sewage in the outfall of the separated sewer was an average BOD of 2.7 mg/L, CODmn of 4.9 mg/L, TN of 3.8 mg/L, TP of 1.9 mg/L, and SS of 5.3 mg/L, Because the quality except for TP was less than the water quality standard of wastewater treatment plant (WTP), a prevention facility was needed to prevent the sewage inflow to interceptor. When the separated sewer overflows (SSO) were overflowed, the maximum pollutant load was be found to be about from 2.7 to 5.4 times as a BOD base, about from 3.2 to 4.6 times as a SS base higher than average load. There was a big difference according to rainfall intensity and rainfall continuous time. In case the quality of SSO was less than water quality standard or water quality in dry season, SSO was required to discharge to the stream not to inflow to WTP by operating the floodgate in the outfall with water quality data using sensors, such as turbidity sensor, etc. Because removal efficiency by an intercepter load was calculated as low as about 10~20% as a BOD base, removal efficiency could be increased by installing a separated wall within the sewer.