Advanced Materials Research Vols. 518-523

Abstract: In order to recycle the waste peanut hull and TPU(thermoplastic urethanes), the composite made from peanut hull powder which was used as reinforcing material and TPU which was used as matrix material by the method of blending and hot pressing was discussed. The parameters of molding process were designed by orthogonal experiment. The tensile property, bending property and impact property of composite materials were tested in this study. The molding process parameters were optimized with the methods of range analysis and single factor analysis. The results showed that the optimum conditions were given as followings: concentration of peanut hull powder was 60%, hot pressing temperature was 170°C, hot pressing pressure was 12Mpa, and hot pressing time was 5min. Under above conditions, excellent mechanic properties were achieved, which were that tensile strength was 19.63MPa, bending strength was 25.74MPa, impact energy absorption was 1.33 KJ/m2.

Abstract: In this study, we use questionnaires, interviews and some other research methods to investigate the implementation outcome of the household appliance ‘Old for New’ trade-in program (hereafter the trade-in program), and apply the methods of comparative analysis and stakeholder analysis to evaluate the program. This paper, taking the city of Nanjing as an example, aims to provide insights to these questions, and more significantly, to advance some practical and efficient suggestions as how to formulate a reasonable, efficient waste household appliances (hereafter WHA) recycling system in Nanjing.

Abstract: It is analyzed in the paper that the production and composition of waste gas, such blowing gas, associated in the chemical production of the chemical enterprise in Shandong. The calorific value of the waste gas is calculated. Thermoelectricity cogeneration is realizable with using the waste gas as fuel. The scale remaining heat generate electricity is determined. The types of main equipment are discussed. The technical process of cogeneration using chemical waste gas is analyzed. economic benefit is studied in detail.

Abstract: Municipal solid waste (MSW) is a common problem for the mankind. Chinese MSW disposal is characterized with an intense population, the limited land resources, complex composing in MSW, coupled with a weaker environmental awareness and poor public administration. This paper introduces the features and its current situations of the waste industry, analyzes the superficial phenomenon, the underlying factors and the dilemma of the waste proposal industry. The author holds that the hard part of MSW proposal lies in sorting; the focal point community and the core issue management. It is of vital importance to 1) realize the significance of waste sorting, and strengthen the sorting management; 2) highlight the community’s function; 3) standardize the recycling system; 4) perfect the processing system; 5) regulate the industry; 5) establish the industrial development mechanism.

Abstract: Two key products were isolated and purified from liquid mixture composition of wheat straw, by means of a combination of organic solvent extraction and column chromatography. Their structures were identified on basis of nuclear magnetic resonance (1H-NMR, 13C-NMR, DEPT), mass spectrometry (MS), and infrared (IR). The mechanism of liquefaction of straw was inferred from the structures of products and changes of hydroxyl value and liquefaction residue, which make up the lack of mechanistic studies of overall utilization of plant fibers.

Abstract: With the increase of urban population, the large number of municipal solid waste(MSW) has increasingly become a major threat to the urban environment and the health of urban residents. So the treatment of MSWs is very important and urgent. This paper analyzed the major factors influenced on the output of MSW in Nanchong city, the dominant factors influenced the output of MSW are urban population, per capita consumption expenditure of urban residents. And the output of MSW in the next future decades was predicted using the Binary Linear Regression Model. Finally, put forward some suggestions to provide a reference for the reduction, recycle and safe treatment of MSW in Nanchong City.

Abstract: For the large number of waste cotton/hemp blend fiber, the molding technology of manufacturing waste blend composites was designed and optimized by mixed hot pressing in this paper, and the mechanical properties of composites were analyzed. Through the orthogonal experiment, the optimum conditions were given as follows: cotton, hemp, TPU fiber composite: the ratio of waste blending fiber 40:60,hotpressing temperature180°C，the concentration of TPU 60%,hotpressing pressure 10Mpa,.The density of composite made by this condition was1.220 g/cm2. Under above conditions, the composites had the density 1.220g/cm2, the tensile strength32.30Mpa, the bending strength 28.51Mpa and the energy absorption of impact 37.25 KJ/m2, heat transfer coefficient 0.0018W/M•K.

Abstract: Biomass is an important renewable and sustainable source. Aromatic plants are biomasses and are widely used in the fragrance industry. The recovery of aromatic plant wastes is important not only for the prevention of environmental issues, but also for the rational utilization of natural resources. In this paper, the utilization of aromatic plant waste resource is depicted. The prospects of utilization of rose waste are offered.

Abstract: Fossil oil as a nonrenewable energy resource, with the development of global economy, the need for energy increases continuously. Biodiesel is a renewable and clean energy, which is made by vegetable oil or animal fat and methyl alcohol to produce fatty acid esters. This research shows that waste cooking oil can be used for biodiesel by the means of esterification and transesterification, at the same time waste cooking oil can be reused. Through orthogonal design, the optimum conditions are that at first ,using sulfuric acid 5wt% of waste cooking oil as catalyst, the molar ratio of methanol and oil is 30:1, the reaction temperature is 65 °C，and the reaction time is 3h ; the second step, KOH is used as catalyst, the amount of the KOH is 0.15wt%, the levels of methanol to oil ratio is 25:1, reaction temperature is 60 °C， reaction time is 1h. The maximum yield of biodiesel is 93.24wt%.

Abstract: Three dining rooms located in east and south campus of Zhengzhou Institute of Aeronautical Industry Management were selected as the sampling points for the research. The kitchen waste disposal in Zhengzhou city was in a disorder state, and there was great space for the policy and social demand of the concentrating recycling of kitchen waste. The kitchen waste contained 19.52% of crude protein, 4.08% of crude fiber, 21.19% of fat, and 29.67% of total starch. After enzymolysis of the organic matter in the kitchen waste, the crude protein was degraded 61.17%, the crude fiber was degraded 50.90%, the crude fat was degraded 27.42%, the total starch was degraded 71.22%. The next stage of important research problems for the kitchen waste treatment were desalination and degrease technology, secondary pollution control technology, and the technology of reducing the inputs of auxiliary material.