Research On Life Cycle Assessment And Environmentalimpact Assessment Of Oriented Strand Board

With the strengthening of global environmental awareness,in response to global climate change,so much countries around the world have proposed the low carbon economic development model,the top policy of environmental design of "Green Manufacturing System" and "Promote Green Consumption" have introduced rapidly in China.As an important material industry in China,wood-based panel industry is closely related to the national economic including the social development and people's life.For promoting the construction of resource-saving and environment-friendly society,great significance on Wood-based Panel industry and the development of economic society.How to use scientific data and detailed theory to demonstrate the practical impact of wood-based panel industry on the environment have studied in this paper.Based on this background,the common international standards?ISO14040-14043?and the national standard?GB / T24040-24043?environmental assessment methods were Cited by this study,the life cycle assessment?LCA?evaluation technology was frameworked into Orented Strand Board?OSB?industry with rapid development in China,and LCA was the first time to evaluate the China's OSB product directionally by GaBi ts software,and the evaluation method for the CML2001-Apr.2013 was used,the research data was collected from the typical OSB mill of China,functional units of 1m3.The conclusions were as follow:?1?The LCA evaluation process was carried out according to the purpose and scope of the study,the inventory analysis,the impact evaluation and the interpretation of the results in this paper.In the system boundary of Gate-to-Gate,the LCA models of material flow of OSB2 / OSB3 / OSB4 were established.Through the LCI inventory analysis shows that: take1 m3 OSB3 level for example,the bigest production process of energy consumption was the hot pressing process,which consumed the electricity for 52.08 degrees?26.6% of total energy consumption?;followed by directional flake process,48.45 degrees?24.8%?;then the drying process,32.58 degrees?16.7%?.Mills could be targeted to improve the energy efficiency of machinery and equipment to reduce energy consumption.?2?Through the LCA method,the six normal environmental impact categories?Including ADP,AP,EP,GWP 100,ODP and POCP?were used in this study,than the normalized reference value and the corresponding weight of China's three kinds of OSB products were calculated.The results showed that the total environmental impact potential of OSB2 / OSB3 / OSB4 was 3.26E-12,3.48E-12 and 5.87E-12 respectively,and sorted by OSB4? OSB2> OSB2,Where OSB3 is slightly larger than the OSB2 level,and OSB4 eventually has a much greater impact on the environment than OSB2 / OSB3.?3?From the environmental impact category: the most important types of environmental impact for the production of 1 m3 OSB3 were AP,POCP and GWP 100,environmental impact potential values were 1.81E-12,8.26E-13,7.24E-13.Accounting for 52.1%,23.7% and 20.8% of the total environmental impact potential respectively,and EP,ADP and ODP had little effect.From the point of view of production process,the environmental impact of OSB glueing process was the most serious,accounting for 28.4% of the total environmental impact of OSB life cycle,and the main influencing factors was AP;the hot pressing process taked for the second,accounting for 18.0% of the total,and the influencing factors were also AP.Then 16.8% for directional flake process,followed by drying process,accounting for 11.3%,while the proportion of other processes to the environment was about 25.5%.The multiple environmental indicators of the environmental performance had impacted significally by the electricity and adhesives of OSB,the power and adhesive consumption had need to focus on to reduce the environmental impact of OSB.?4?In the system boundary of Cradle-to-Gate,through for comparative analysis with the European / North American typical OSB products,came to the following conclusions: the hard coal was used extensivelly for China's OSB as the main energy,accounting for up to 77%,followed by hydroelectric power,and accounting for about 17.7%.The cleaner energy was tended to use in terms of energy supply in Europe and North America,relying more on natural gas and nuclear rather than coal.Europe's natural gas accounted for 47% of total energy,and up to 30% in North America.And North America nuclear power was up to 18%,14% in Europe.?5?The results of Non-renewable primary energy consumption have showed that typical OSB in Europe and North America consumed less non-renewable energy in the Cradle-to-Gate boundary,North America?4777.3 MJ?<Europe?5054.9 MJ?<China?5639.4 MJ?.In the OSB production phase alone,the typical OSB plant in Europe consumed only 1684.9MJ?about 33.3% of the total?,compared with 4698.3 MJ?83.3%?and 4439.7MJ?accounting for 92.9%?of the North American plant.Europe have benefited by equipped with.the biomass power plants to consume less renewable energy resources.?6?The analysis of carbon dioxide emissions have showed that the storage of CO₂ stored in raw materials was sequential,?1168.5 Kg CO₂?> China OSB?1157 Kg CO₂?> North American OSB?1098.94 Kg CO₂?.After balance calculation of CO₂ emissions,the actual storage of CO₂ was offset by logging and transport,and OSB production process of CO₂ emissions as follows: China's OSB?-811 Kg CO₂?> European OSB?-777 Kg CO₂?> Americas OSB?-811 Kg CO₂?which indicated that China still had 811 Kg of CO₂ stored in 1 m3 OSB until the entire life cycle after the end of the release.In addition,fresh water resources need to consume 28.96 kg of 1 m3 Chinese OSB,Chinese OSB saved 39.46% of fresh water consumption compared with North America.?7?The key environmental impact factors?KPIs?in OSB environmental impact assessment were identified in this study.Finally,5 sub-indicators including resource consumption,environmental classification,air pollution,water footprint,water pollution and ecological environmental toxicity,and 12 three-levle indicators categories were established.On this basis,a set template file of type ? environmental labeling certification of Chinese OSB was builded completely,which will help enterprises to achieve the goal of sustainable development.