• Proceedings of the Korean Society for Bio-Environment Control Conference
• /
• 1996.05a
• /
• pp.63-73
• /
• 1996

The importance of plant factory which blend agriculture and manufacture has been discussed widely. This company has researched hydroponics technique for cultivation which has been mainly developed in the sites of Okinawa and Hyougo Prefecture. In 1987, we stopped the previous research there, and started a new one far plant factory at the Agricultural Research Center of Chiba Prefecture. In 1989, we built four experimental plant factories (120㎡) at Chiba Oil Factory Refinery in Ichihara-city, developing techniques of cultivation, equipment production and environmental control for cultivation system of tomato, strawberry and leaf vegetables. (omitted)

• Journal of the Korea Safety Management & Science
• /
• v.10 no.2
• /
• pp.133-141
• /
• 2008

The need for total enterprise management that covers from accepting orders, design, cost, procurement, manufacture, and delivery has been recently raised in order for efficient project management of small and medium size plant construction enterprises. This trend is reflected in the introduction of EPM(Enterprise Project Management) solutions by some shipbuilding enterprises and large construction corporations. In step with the trend, small and medium size plant construction enterprises are enabled to provide knowledge base in terms of reducing cost and production period and managing portfolio for accepting orders and attaining contract by inducing customized EPM This study presents a design of customized EPM based on a case study of a company. It exhibits a collaborative/collaboration resource-supply model which can be universally applied to small and medium size job-order production enterprises. The research discusses that under the assumption that information is shared internally between departments on planning, supply, manufacture, and quality control in order to create collaborative environment and close participation is created externally between suppliers and orderers, productivity can be improved in cost reduction through planning efficient collaborative supply model.

• Proceedings of the Korean Society for Agricultural Machinery Conference
• /
• 2000.07a
• /
• pp.95-102
• /
• 2000

• Journal of Environmental Health Sciences
• /
• v.20 no.3
• /
• pp.1-12
• /
• 1994

Wastewaters being treated and final effluents were collected from 3 wastewater treatment plants of petrochemical industries, from August 31 to October 4, 1993 in an interval of 10 days, and further analysed by GC/FID to investigate discharge situation and removal efficiency on polycyclic aromatic hydrocarbons. The results were as follows: 1. The PAHs 294.57 $\mu$g/l were discharged in primary treatment effluent of plant A to manufacture vinyl acetate resin and acryl, and removed 54.51% by aeration and totally 84.71%. 2. The PAHs of the highest concentration were discharged in primary treatment effluent of plant B to manufacture PS resin and ABS resin, but removed 91.65% by activated sludge process and 98.19% by activated carbon to discharge PAHs of the lowest concentration comparing to another treatment operations. 3. The PAHs 99.96 $\mu$g/l of the lowest concentration were discharged in wastewater of plant C to manufacture epoxy resin, and removed 80.48% by activated sludge process. 4. B treatment system including activated carbon showed up the best removal efficiency of PAHs. Activated carbon therefore, seems to be effective as tertiary treatment. 5. Correlation coefficient of components to total PAHs was generally low, and correlation coefficients of phenanthrene, pyrene and acenaphthylene to total PAHs were each 0.98, 0.97 and 0.80, respectively. Correlation coefficient of the sum of phenanthrene, pyrene and acenaphthylene to total PAHs was 0.99, so that the sum of phenanthrene, pyrene and acenaphthylene was available as index to estimated total PAHs. 6. Phenanthrene and Chrysene were very well treated biologically and acenaphthylene and fluoranthene were untreated biologically. 7. Considering EPA standards, it seems that the concentration of phenanthrene, pyrene, fluoranthene, and benzo(k)fluoranthene is high level.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1994.10a
• /
• pp.405-414
• /
• 1994

The High Strength Concrete REsearch Team of the Dong-Ah Construction R&D Institute has achieved the preactical use of the PHC pile manufacture technique at the Dong-Ah Chang-dong PC Plant. Components of the high strength concrete are used high strength cement, admixtures(water reducing high range admixture, micro silion fume, fly ash, gypsum). The design strength required 800kg/$\textrm{cm}^2$ was developed raging from 870kg/$\textrm{cm}^2$ to 1010kg/$\textrm{cm}^2$. The new manufacture procedure of HPC pile which include placing, molding, steam curing is able to apply a current PC pile manufacture procedure easily without using the high pressure steam curing.

• Cement
• /
• s.30
• /
• pp.44-50
• /
• 1969

To manufacture portland cement and sulfuric acid from gypsum has long been established in Europe. As sulfur, more Precisely sulfuric acid, is getting around shortage, it boosts hunt for alternate sources and for new fertilizer process. As the result, all

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2006.04a
• /
• pp.469-471
• /
• 2006

• Journal of Korean Society on Water Environment
• /
• v.34 no.1
• /
• pp.77-83
• /
• 2018

This paper aims to evaluate the results of toxicity testing with Daphnia magna and Vibrio fischeri on wastewater samples which might be influenced by ion imbalance. The effluents from factories were found to be more toxic with high salinity levels than those from public wastewater treatment plant (WTP) and sewage treatment plant (SWP). Clion composition was highest in the effluent, in terms of percentage, which was followed by $Na^+$, $SO_4^{2-}$ and $Ca^{2+}$. $K^+$ and $Mg^{2+}$ ion was relatively low. The sensitivity of D. magna test results was higher than V. fischeri. Among samples which were proved by V. fischeri testing to be nontoxic, the composition ratio of each ion whether toxic samples or nontoxic samples which were decided by D. magna toxicity testing, were compared. $Na^+$, $K^+$, $Ca^{2+}$, $Mg^{2+}$ ion composition ratio showed high level in nontoxic samples whereas $SO_4^{2-}$ and $Cl^-$ ion composition ratio was high in toxic samples. Accordingly, $SO_4^{2-}$ and $Cl^-$ ion seemed to be considered the ions causing toxicity in effluent. Toxicity from some categories of industries (Mining of non-metallic minerals, Manufacture of basic organic petrochemicals, Manufacture of other basic organic chemicals, Manufacture of other chemical products etc.) seemed to be influenced by salinity. The Ion concentration in influent and effluent were similar. Concentration of $Na^+$, $Cl^-$, $K^+$, $Ca^{2+}$ ions were high in influent, however $Mg^{2+}$ and $SO_4^{2-}$ ions were high in effluent.

• Advances in Traditional Medicine
• /
• v.9 no.3
• /
• pp.207-216
• /
• 2009

Bauhinia variegata Linn (Mountain Ebony) is a medium-sized, deciduous tree, found throughout India, ascending to an altitude of 1,300 m in the Himalayas. The plant is widely used by the tribals throughout India and popular in various indigenous systems of medicine like Ayurveda, Unani and Homoeopathy. Following the various traditional claims on utility of this plant in curing number of diseases, considerable efforts have been made by researchers to verify its utility through pharmacological screenings. The notable biological activities reported are anthelmintic, antiulcer, antitumour, antimicrobial, anti-inflammatory, antigoitrogenic, hepatoprotective and haemagglutination. Industrially, the plant is widely used for the manufacture of wood wool board, production of tannin, oil, gum and fibre. The plant is also utilized for afforestation to conserve the nature. In this article, a comprehensive account of the cultivation, microscopy, phytochemical investigation, traditional and biologically evaluated medicinal uses of B variegata is presented.

• Proceedings of the Safety Management and Science Conference
• /
• 2009.11a
• /
• pp.209-221
• /
• 2009

In the steel industry, steel is manufactured and processed to produce a variety of steel products. The industry provides fundamental materials to the whole range of industries including car, ship, electric appliance and construction industries, so that it is very important as an infrastructure industry. The steel manufacture process involves aerial work, many danger factors caused by the treatment with hazardous gases including BFG and COG and by high pressure gases including H2, O2, N2 and LPG. It requires the management over the large area because many workers work in a plant. The potential dangers in the steel plant were identified and the effect of the danger assessment was verified through the analysis of the danger assessment for the steel plant. The allowed degree of danger was lowered after the improvement through the danger assessment in the plant where the case studies were conducted, which indicates that the danger assessment is highly effective.