Application Of Nano Material Composite Membrane In Treatment Of Wastewater Containing High Concentration Of NH₄Cl

With the development of fertilizer industry in China, the influence to the environment that caused by the industrial wastewater with ammonium-chloride was more and more severe , the large amount of the wastewater discharging of ammonium-nitrogen and Cl-(chloride ion)would do harm to the environment. If the concentration of ammonia-nitrogen was too high, it would cause the eutrophication of the water and do harm to the health of human beings to some degree. The large amount of chloride ion would also change the structure of the soil and do damage to the crops and underground buildings. However, to study the economical and efficient technology of dealing with the high concentration of ammonium-chloride industrial waster water was much of important.In this thesis, the author looked up a lot of documents and considered the present situation of membrane technology and mechanism of separation. Considering the wastewater of Lunan fertilizer factory, when the concentration of ammonia-nitrogen was more than 13000 milligram per liter in ammonium-chloride wastewater, chemical fertilizer could be made by technique now available. Using the patent production—nano material composite membrane, a separating device was designed and assembled by the author.With the simulated high concentration ammonium—chloride wastewater, the optimizes operating situation was obtained with the treatment of the separating device. According to the relationship between the desalination, fresh water production and operation parameters, the treatment conditions were optimized as follows: membrane separation pressure was 5.5Mpa, wastewater temperature was at 35℃, pH value was 6. When this device was used for the dispose of the wastewater with NH4+-N of 1304mg·L-1~14071mg·L-1 and Cl- of 3255mg·L-1 ~30152mg·L-1, a desalination over 95% could always be maintained, and the fresh water production changed from 48% to 13%. For a kind of NH4Cl wastewater discharged from a fertilizer plant, which contained Cl- of 28710 mg·L-1 and NH4+-N of 9457 mg·L-1, a disposal system consisted of three same membrane devices was designed, a fresh water which was up to the water quality standard for...