Life Cycle Assessment Of Landfill Leachate With Persulfate Instead Of Reverse Osmosis

Landfill leachate is a highly degradable organic wastewater content,the conventional process can not effectively remove the organic matter.The reverse osmosis membrane technology suffer with the existence of a one-time investment,membrane fouling,short using time,high operating and handling costs,thus limiting the promotion of the technology,persulfate advanced oxidation technology because of its fast response,Secondary pollution and other characteristics of the treatment of refractory wastewater has a greater advantage of the two types of process evaluation for the process options to provide reference has a very important significance.LCA(Life Cycle Assement)is a life cycle environmental impact assessment method,through the persulfate advanced oxidation technology and reverse osmosis membrane treatment technology life cycle evaluation,for the process to provide a reliable basis for comparison,this article The following work was carried out: 1.to determine the scope of the study of reverse osmosis membrane technology and the required inventory data,through the field test and collection of daily reports to obtain the list of life cycle assessment of reverse osmosis membrane technology,life cycle modeling and economic analysis;2.The results of the study were used to determine the scope and objectives of the study.The response surface methodology was used to optimize the reaction parameters of UV + heat+ Persulfate technology,Fe~0 + UV + Persulfate technology from the construction,operation,waste three stages of material depletion,energy consumption,pollution emissions;3.Building a model.Simapro8.0 lifecycle evaluation software,CML-IA baseline impact evaluation method and Ecoinvent3.0 database were used to evaluate the completeness,contribution analysis and explanation of the results.The main conclusions of this paper are as follows:1.The reverse osmosis process has the greatest impact,and marine ecological toxicity is the main environmental impact of reverse osmosis process.2.The main factors influencing the environmental impact of the reverse osmosis process are the energy consumption during the operation phase and the concentrate treatment stage.The main environmental factors of the Fe~0 + UV + persulfate process are pharmaceutical consumption,UV + heat activation + persulfate The main factors affecting the environmental impact of electricity consumption and consumption of electricity consumption.3.Three processes in the environmental impact of the life cycle: Operation phase> Construction stage> Scrap removal stage,treatment cost: UV + heat activation + persulfate> Fe~0 + UV + persulfate process> reverse osmosis process.4.Ultraviolet + heat activated + persulfate process in the economic reverse osmosis process is not an alternative,in the environmental impact of the alternative is weak;Fe~0 + UV + persulfate process in the environmental impact of the reverse osmosis process is relatively strong,There is no alternative to the economy.Reducing the cost of persulfate agents is the key to enhancing the viability of persulfate processes.