• Resources Recycling
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• v.10 no.2
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• pp.41-49
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• 2001

In this study, the properties of cement mortar and concrete using ceramic wastes as fine aggregates and coarse aggregates are considered experimentally. Flow value of mortar using ceramic waste as fine aggregates is increased more or less, and the com- pressive strength of mortar using ceramic wastes as fine aggregates is increased with elapsed age. The slump value of concrete using ceramic wastes fine aggregates and coarse aggregates is somewhat decreased. The compressive strength of concrete using ceramic wastes as fine aggregates and coarse aggregates is lower than that of OPC concrete in early age, but has gradually increased in long ages.

• Journal of Family Resource Management and Policy Review
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• v.7 no.1
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• pp.119-133
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• 2003

The purpose of this study, thesis is to find out the main cause which influences recycling behaviors regarding package wastes. For this purpose, it discusses the difference of recycling behaviors based on socio-demographic factors and lifestyle categories and, it analyzes the relative influencing power of socio-demographic factors and lifestyle on recycling. The results are as follow: First, recycling behaviors on grounds of socio-demographic factors showed considerable difference as regards to age and income. At the income level of 3 Million Won (per month) and the higher the age, recycling behaviors were well established. Second, recycling behaviors based on lifestyle categories demonstrated considerable difference. While the pragmatists and sincere-devoted showed quite positive recycling behaviors, the social activity-oriented and other-directed fashion-pursued did not. Third, the most influential factor on recycling was the parsimony-oriented lifestyles.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 2006.09a
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• pp.3-12
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• 2006

The main feature of these total technologies is that we can constitute the optimum treatment scheme fitting to the property of wastes, amount of wastes and energy requirement. For high moisture content wastes or biomass resources, high pressure steam process (MMCS) for crush, dry and deodorize wastes to produce high quality fertilizer of fuel is most appropriate. For dry or semi-dry solid wastes, the STAR-MEET system can be applied to produce low-BTU gases for power generation using duel fueled diesel engines of Stirling engines, and the REPRES and HyPR-MEET systems can be applied to produce hydrogen rich medium-BTU gas. For waste plastics and oils, liquefaction technology is best fit to produce light oil or kerosene equivalent fuel oils. These total technologies are completely different from the existent waste treatment technologies based on land-filling or incineration, and are expected to disseminate all over the world in the near future.

• Journal of the Korean association of regional geographers
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• v.10 no.4
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• pp.775-786
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• 2004

Establishments of wholesale of recycling materials are located in the region where an amount of recyclable wastes generated as artery industry developed and the region of rather many population. And they are located not in underpopulated area as noxious facilities, but located in the non-residential area of many population regions in the whole country. Also, establishments of recycling of metal wastes and scrap, and non-metal wastes and scrap are mainly located in the peripheral region of metropolitan cities, regional centered cities, and adjacent regions of industrial area, because of high coefficient of localization, and agglomerated effects of production. The factor influencing the location of recycling industries is deeply connected with the location of wholesale of recycling materials, and thus, the transportation costs to carry recycling materials from supplied regions to plants are important but population is not so important.

• Resources Recycling
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• v.23 no.3
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• pp.71-77
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• 2014

It is believed to have the international competitiveness of the domestic petrochemical in conjunction with the production of high value-added new product and variety of application by supercritical fluid process and the reaction of infusible/insoluble plastic wastes recycling. In this article, the patents and papers for the recycling of organic residues from the plastic wastes using supercritical fluids were collected and analyzed. The open patents of USA (US), European Union (EP), Japan (JP), and Korea (KR) and SCI journals from 1993 to 2012 were investigated. The patents and journals were collected using key-words and filtered by the definition of the technology. The patents and journals were analyzed by the years, countries, companies, and technologies and the technical trends were discussed in this paper.

• The Journal of the Korea Contents Association
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• v.17 no.1
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• pp.485-495
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• 2017

The purpose of this study was to analyze research trends on recycling of construction wastes. Total 72 research papers published in domestic academic journals from 1995 to 2016 were analyzed. Four indicators were used for analytical framework of this study: research period, research field, research method, and research theme. The greatest amount of researches related to construction wastes recycling were executed during 2006-2010. Over half of the researches were done in architecture area. The most frequently used research method was combined method which used qualitative and qualitative method simultaneously. In terms of research theme, many of the subject researches were interested in understanding the current state of construction wastes recycling. It is recommended for further research to perform meta analysis which extends research subjects and range of keyword in macro perspective.

• Asian-Australasian Journal of Animal Sciences
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• v.12 no.4
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• pp.642-650
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• 1999

Options available for utilization of animal wastes include sources of plant nutrients, feed ingredients for farm animals, substrate for methane generation, and substrate for microbial and insect protein synthesis. The wastes have the most economic value for use as animal feed. Performance of animals fed diets containing animal wastes is similar to that of animals fed conventional diets. Processing of animal wastes to be used as animal feed is necessary for destruction of pathogens, improvement of handling and storage characteristics, and maintenance or enhancement of palatability. Feeding of animal waste has not adversely affected the quality and taste of animal products. In the USA copper toxicity has been reported in sheep fed high-copper poultry litter, but this is not a serious problem with cattle. Potential pathogenic microorganisms in animal wastes are destroyed by processing such as heat treatment, ensiling and deep stacking. Incidents of botulism, caused by Clostridium botulinum, have been reported in cattle in some countries, and this problem was caused by the presence of poultry carcasses in litter. This problem has not occurred in the USA. With appropriate withdrawal, heavy metal, pesticide or medicinal drug accumulation in edible tissues of animals fed animal wastes is not a problem. Feeding of animal wastes is regulated by individual states in the USA. The practice is regulated in Canada, also. With good management, animal wastes can be used safely as animal feed.

• Journal of Korea Technology Innovation Society
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• v.2 no.2
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• pp.290-308
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• 1999

In this study a system for the treatment or recyling of organic wastes from both urban and rural area was recommended. It was developed based on the resource recovery system regarding human being by four tectnologies; forage, methane production, high-grade composting and complete decomposition. High quality compost can be produced by combining several kind of wastes produced from urban and agricultural areas. High quality compost must possess not only general characteristics of ordinary compost, but also a superior ability to improve the soil properties and must contain more nutrients for plant. Cedar chips were recommended as the main bulking agent to adjust moisture contents and air permeability. Charcoal and zeolite can be used not only as the second bulking agent but also as fertilizer for improve the soil amendment. Complete decomposition of organic wastes is defined by organic matter being completely converted to $CO_2$ and water. All the input water was evaporated by the heat produced through the oxidation of organic matter, In the present study, the complete treatments were successfully achieved for Shochu wastewater, swine wastes, thickened excess sewage sludge, wastes produced by Chinese restaurant and anaerobic digested sludge. First of all, recycling center of organic wastes should be established for the protect the environments and effective recovery of organic resources. This may means the way to derive the recovery of human value.

• Resources Recycling
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• v.6 no.3
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• pp.22-27
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• 1997

Recycling of radioactively contaminated metal wasles is very attractive to reduce thc final disposal volumc of the radioactive wastes, thereby maximizing the usage of nahrral rzsuunts and minimizmg the detrimental effects of thz rzdioaclive wastes on the environment. In the recycling process, many complicated processes arc involved. Among those processes the 'surface contamination removal techniques such as physical, chemical and electrochern~calm ethods are the most critical and Ircquently applied in accordance with the contamination characteristics and the chemical compositions of the metal wastes. In this sludy, the sulfuric acid-cerium method and electmchemical methods were applied lu removc the conatiminated suhce. The results showed the surface contaminalion could he lowered to the background levcl by lhasc mclhods.

• Elastomers and Composites
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• v.47 no.2
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• pp.96-103
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• 2012

This paper reviews recent technologies for recycling poly (ethylene terephthalate) wastes. Wide application and non-biodegradability of the PET creates huge amounts of waste and disposal, leading to an environmental problem and economic loss. Chemical recycling can be a promising technology to deal with these problems by converting the waste into useful feedstock material for polyester production. Chemical recycling of polyethylene terephthalate are processes where the PET polymer chain is destructed by the impact of glycol (MEG) causing glycolysis, methanol causing methanolysis or water causing hydrolysis. After intensive purification polyester oligomers or the monomers MEG, dimethyl telephthalate (DMT) or purified terephthalic acid (PTA) are received which are re-used to produce polyester products.