毕业论文英文翻译及原文封面(12)

transfer station deal through the hydrolysis process and recover oil, fertilizer

production, and the remaining waste could be transferred to the North God tree landfill in Beijing for final disposal. After handling the restaurant garbage with the method of thermal hydrolysis, then the solid-liquid separation is followed by. Solid material adjustments to the moisture content of 50% begin the aerobic composting. After being made to achieve stability in the bio-organic fertilizer, the compost aerobic part of the algorithm, is the same to environmental emissions compost aerobic part of Nan palace. To deal with some of the heat and power consumption, according to the known hydrolysis restaurant garbage treatment plant process design technology of the main technical and economic indicators to estimate, we can see to deal with a ton of restaurant garbage that the power consumption of 36 kWh. In addition, only CO2 and NH3 are considered to be pollutant gases. Specific treatment process is shown as Figure 1 (b).

3.3 LCI modeling and impact assessment

The life cycle of each system contains a list of not only the system's energy

consumption, waste treatment and disposal of the environmental burden, but also the production of alternative energy-saving products. If a product, such as electricity, fertilizer or feed to replace the system of external demand, the product must contain its host system, the revenue generated. In order to obtain a list of the life cycle of fuel and electricity consumption, the use of IWM-2-type model is made. To consider the power consumption of restaurant garbage treatment system, the paper used the data from China's electric power released by National Bureau of Statistics in 2007(thermal power 82.85 percent, 15.24 percent water, nuclear energy, 1.91%). However, if the system beyond the capacity of its own power requirements, and the assumption of

power over an alternative to conventional energy (coal 54.8 percent, 8.1 percent of oil, gas and 13.2%, 23.2% nuclear energy, water 0.8%), profits of power can be calculated according to State power grid construction and operation. This shows that the output of electricity through the garbage disposal can reduce the power consumption of grid, as well as to defer the construction of new power plants.

In this study, scattery collection and transportation were excluded from the steps outside the borders of the system; comparing to the same process, the unit

consumption of water resources, chemicals, as well as the system's construction and loss brought about by the relative burden on the environment are smaller, so the

burden of the same type of environment is ignored . Each flow diagram of the system and parameters are shown in Figure 1. According to the University of Tennessee law , all the environmental burden predicted is to be divided into five categories: global warming (GWP100, in order to kg CO2 eq. / kg total), the eco-toxicity (ISAQ, in order to kg 1,4-DCB eq. / kg total), acidification (AP, in order to kg SO2 eq. / kg total), eutrophication (EP, in order to kg PO43-eq. / kg total).

4. Results and Discussion

4.1 Environmental charactertic impacts of each system

From figure 1 we can obtain list results of the life cycle of two kinds of resources to deal with waste including aerobic composting and thermal hydrolysis, as shown in