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RISS 인기검색어
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- 저자 : ( E. Sembiring ) (검색결과 2 건)
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( R. Audi ),( E. Sembiring ) 한국폐기물자원순환학회(구 한국폐기물학회) 2015 한국폐기물자원순환학회 3RINCs초록집 Vol.2015 No.-
Waste is become one of many environmental problems in Bandung, Indonesia, especially plastic waste. Every year, there is increasing trend of the need of plastic about 200.000 tons annually in the country. Taking focus of plastic bag waste, it poses real environmental impacts because of its characteristic of low degradability so it may cause flooding by clogging the drainage, polluting the ocean, and producing toxic gases when burned. The first method of 3R concept, reduce, is used in this study by implementing the provision of shopping bags so that waste can be reduced. This study aims to determine the effect of intervention on plastic bag waste reduction. There are six sites with three levels of economic differences. Intervention is given to the three sites, while others are not. Waste sampling carried out by two phases, phase I performed before intervention and phase II performed after the intervention is completed. Intervention contains provision of shopping bags and information related to plastic bags. The result, Bandung produces waste up to 2.16 litres/person/day or 0.40 kg/person/day with the average composition of the waste plastic bag is 5.66% from total waste. In detail, ccomposition of plastic bag waste in the upper class community is 7.45%, the middle class is 5.35%, and the lower class is 4.18%. Test of significance, t-test of plastic bag waste from phase I and phase II, shows that the intervention has a significant effect on plastic bag waste reduction. On average, shopping bag intervention approach successfully reducing plastic bag waste up to 35% in the study area.
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( Tomy Listyanto ),( Galihaji Saka Felix E. K. Sembiring Colia ),( Harry Praptoyo ),( Yus Andhini ),( Joko Sulistyo ) 韓國木材工學會 2017 한국목재공학회 학술발표논문집 Vol.2017 No.1
This study was aimed to investigate the effects of various incising density and two type of drying schedules on drying characteristics of teak wood (Tectonagrandis, L.f). Three teaktrees with the diameter of 300-400 mm were cut and sawn into columns with the dimension of 100 x 100 x 5000 mm. Each columnwas cut into five parts with the length of 500 mm. A total of 50 columns with the dimension of 100 x 100 x 500 mm, were used for drying samples. A small sample with the dimension of 20 x 20 x 25 mm was taken in between drying sample to measure initial moisture content. Mechanical incisicing was applied to the the drying sample. Four various incising densities, which were 0, 500, 1000, and 1500 holes/m², were applied to the drying samples. Samples were dried with two different drying schedules, which were low and high temperature, until the moisture content of 12%. Five samples for each factor were used as replication. To evaluate the drying quality, drying rate, defects, and moisture distribution were measured. Static bending test was performed to investigate the strength properties. The results indicated that incising densities of 1500 holes/m² and high-temperature drying could significantly improve drying rate without significants defects. No significant decrease of strength properties among five incising densities was found in this research.
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