Papers by Keyword: Recycle

Abstract: The concern for environmental problems has been increasing rapidly in recent years. Water-soluble coolants are widely used in machining processes. To reduce management costs and the environmental load of water-soluble coolants, the authors studied a recycling system for water-soluble coolants. With this recycling system, water is extracted from a waste coolant by chemical or biochemical treatment; the recovered water is re-utilized as a diluent for a new coolant. Coolant recyclability depends on the coolant type. Most water-soluble coolants contain alkanolamines for corrosion inhibition and maintenance of putrefaction prevention. However, alkanolamines are difficult to eliminate from water-soluble coolants by chemical and physical waste treatment processes. Some amine-free, water-soluble coolants have been developed and are commercially available. The reduction of environmental load in the treatment of waste coolants is anticipated for amine-free coolants. We applied the recycling process to a commercially available amine-free, water-soluble coolant. The amine-free coolant showed good recyclability and lubricating performance. However, the corrosion inhibition performance of the coolant was inadequate for use in general machining. Recently, our cooperative company developed a prototype amine-free, water-soluble coolant with improved corrosion inhibition. In this study, we experimentally examined the recyclability and performance stability of this newly developed coolant. The experimental results showed that the new amine-free coolant has good corrosion inhibition equivalent to conventional amine-containing coolants. In addition, the recyclability, stability, and cooling and lubricating performance of the coolant are equal to conventional amine-free coolants. The amine-free, water-soluble coolant with improved corrosion inhibition has the advantage that it can be used in the recycling system for water-soluble coolants.

Abstract: With the Industrial revolution and modernization, many other issues related to it are also increasing. Problems of resource exploitation, pollution etc. has emerged as global issue and matter of high concern. Out of various industries, construction industry is one such sector which contributes highly for problems like emission of green house gases into atmosphere. Materials like cement, steel, bricks are highly energy intensive materials. Many of the conventional materials and technology options for building construction do not meet sustainability criteria. Lesser use of theses material and alternative environmentally friendly material contributes significantly in reducing CO₂ gas emission and problems associated with it. The strategy of 3R that is Reduce, Reuse and Recycle is one of the important techniques in the construction industry to achieve the sustainability. The same strategy is applied in this research work for finding appropriate substitute for major construction resource that is concrete and on basis of experimental strength results and property findings, the structural stability of various waste mix concrete elements is analyzed and designed so as to find corresponding changes in RCC design if any appears. The comparative results of analysis and design for various such percentage replaced waste mix concrete is highlighted. The analysis and design results obtained on the basis of innovative materials having specimen properties are fair enough for utilizing in construction practices.

Abstract: Recycle, reuse and reduce are commonly heard as the activities to support for green environment. However, without or lack of self awareness and voluntary to contribute to the green it can cause a failure effort and projects from the government and other sectors. Furthermore, the public could not be expected to keep recycling without enough motivation, assistance and facility. Alternatively, we proposed a web application as an e-platform for the community and business entity including shopping mall, green business and other agencies to support and collaborate between each other in supporting for recycle and reuse. We have investigated through survey and interview with those involved including the public and representatives from the selected shopping malls to collect data of the current scenario regarding their awareness and willingness to contribute to green. Our solution called e-Reward for Recyclers purposely to motivate people to recycle their used items from home at one stop recycling centre by collaborating with shopping malls. Lastly, we wanted to connect people from the green business including recycle factory, reused company and welfare organization to the recycle centre for them to collect mass recycled items to be reused for their purposes.

Abstract: Renewable energy is a source of energy that can be recovered and recycled. The recyclable material is removed first before energy is recovered from the residual waste. In this study, the effect of pyrolysis temperature on the calorific value of sustainable materials and gas emission quality were carried out. Pyrolysis and non-pyrolysis processes were initially conducted before calorific value determination. Calorific values of the samples were measured by bomb calorimeter. The sample that contains the highest calorific value was chosen and compared with coal. Testing of the prepared samples was accomplished using combustion process. The characterizations of the samples were determined by TGA analysis, SEM, FTIR and elemental analysis. From the results obtained, it is observed that the calorific value of sustainable material depends on the number of hydrogen, carbon and thermal energy.

Abstract: Based on the development of the construction and demolition waste recycle, this paper expands comprehensive thinking and analysis on the current situation and problem of construction waste recycle supervision and management system. From business management, administration, economic and public opinion etc, this thesis proposes establishing sound construction waste recycle monitoring mechanism and providing the basic system guarantee for construction waste recycle.

Abstract: This research established a density separation system by using sorting media such as calcium chloride solution (CaCl₂), sodium chloride solution (NaCl) and ethyl alcohol solution (C₂H₅OH) to study the density separation experiment involving nine different waste plastics. The results showed that PVC(or POM or PET), PC, PA6, PS(or ABS), HDPE and PP could be progressively separated from their mixtures by CaCl₂(1.3005g/mL), NaCl (1.1604g/mL), NaCl (1.0861g/mL), tap water (0.9969g/mL) and C₂H₅OH(0.9039g/mL) with a 100% of sorting rate, respectively.

Abstract: Based on the shortage of materials during emergency rescue after the earthquake, it proposes the self-rescue principle for the temporal relocation of victims. Through analyzing different types of emergency shelter, and combined with features and purposes of local materials that can be directly used after the earthquake, it puts forward the method of locally selecting materials and rapidly building emergency shelters. It provides victims with a new choice for the temporal relocation during emergency rescue after the earthquake.

Abstract: The effects of different particle sizes of recycled latex glove (rLG) on curing characteristics of SMR L were examined. Two different size ranges of rLG particles, i.e., 100-300μm, 2-3 cm were used in this study. The SMRL/rLG composition of 100/0, 100/5, 100/15, 100/25, 100/35 and 100/50 were prepared using a two roll-mill at room temperature. The characterization results of the blends shows that scorch time, t₂, and cure time _t90 of the SMRL/rLG blends decreased with increased rLG content as well as decreasing sizes of rLG particles due to the existence of cross-linked precursors and unreacted curative in the recycled rubber. Among all blend ratios, the SMRL/rLG blends with fine size of rLG particles exhibit lowest minimum torque (M_L) compared with the coarse size of it in SMRL/rLG compound which resulted in more efficient processing. The maximum torque (M_H) of SMRL/rLG compound shows a declining trend with increasing rLG content probably due to the poor interactions in SMRL/rLG compound. As the particle size decreased, the contact surface area increased which provided more efficient interfacial bonds, leading to better properties. Results indicated that the fine size of rLG filled SMR L contributed to the better properties compared to coarser size of rLG filled SMR L mainly at 15 phr of rLG.Key words: Recycled – rubber – latex – glove – SMR L

Abstract: In recent years, the abrupt public affairs occur frequently. Emergency resources as a kind of special resource which have a key role in the rescue after disaster happen suddenly. Then whether emergency resource management is high efficiency directly affect the emergency rescue work can achieve the desired results. In this article we analysis each phase of emergency resources supply chain based on the four stages of emergency rescue process theory. Then integrate the emergency resources management with various stages. At last, we will find a way which satisfying emergency management in different stages and the whole process of emergency resource management. Meanwhile, we combine the current situation that emergency resource often more than enough for the emergency rescue arousing the public’s attention and mainly analysis how to recycle the resource that is in the recovery stage.

Abstract: Recently, the concern for the environment has been increasing rapidly. In machining processes, the treatment of water-soluble coolants waste has caused environmental problems. Water-soluble coolants contain surfactants, preservatives, and corrosion inhibitors for maintaining the stability and performance of the coolants. To reduce the management cost and environmental effect of water-soluble coolants, the authors have been studying a recycling system for water-soluble coolants. In the recycling system, oil-free recycle water is isolated from the coolant waste and reused as a diluent of the new coolant. The authors have been developing different types of water recovery methods for the recycling system, and the recovered water from the coolant waste has potential as a diluent for a new coolant. In this report, we focused on the amine (alkanolamine) -free water-soluble coolant. Some amine-free water-soluble coolants have been developed and are commercially available. A reduction in the environmental effect in the waste treatment of coolants is expected with amine-free coolants. We have demonstrated that the amine-free water-soluble coolant has equal or better cooling and lubricating performance compared with the conventional amine-containing coolant. In addition, the amine-free coolant shows good recyclability for the recycling system. The processing time of the recycling treatment of the amine-free coolant has been decreased by half with our recycling process compared with the conventional amine-containing coolant. In this report, we examined the stability, cooling performance and lubricating performance of the recycle amine-free water-soluble coolant in long term operation. The recycle amine-free water-soluble coolant is operated in a 3-axis machining center for several months. We observed concentration, pH, corrosion inhibition performance, cooling performance, and lubricating performance of the coolant. The results from these experiments show the amine-free water-soluble coolant has the advantage to use in the recycling system for water-soluble coolant.