Ammonia / Water In Inorganic Composite Membrane Gas / Liquid Separation Process

The water resources are the foundation natural resource and one ecological environment controlling factor. However, with the development of the industry and agriculture, the population increase and urbanize. Massively the life sewage and the industrial waste contained the ammonia nitrogen disperses into the natural water body and creates the water body serious pollution. The ammonia nitrogen in the water body has the certain toxicity to the human being and the under-water biology. Therefore the separation of the ammonia nitrogen in the water body has the extremely important practical significance.There are many researches removed ammonia nitrogen in the related water body. This paper mainly takes the diatomite as the inorganic membrane material. The membrane parting method removes ammonia nitrogen in the water body. Because the diatomite and the zeolite all have many big pore, higher surface area, strong absorbability, they take suitably the inorganic membrane material. In order to enhance the surface area of the diatomite and the zeolite, their pore structure were improved. The experiments are employed to determine the best choosed diatomite condition. The following is the best conditions: H₂SO₄ is the acid treatment, the density is 8%, the time of ultrasonic vibration is 60min, and the content of raw material is 12%. The ultrasonic wave processing diatomite is analyzed with X- ray diffraction and TEM. The results indicate that the diatomite diffraction peak and non-crystal SiO₂ corresponded. So the choosed diatomite is mainly non-crystal SiO₂. The diatomite is analyzed through chemical analysis and the SiO₂ content reaches 92%. Second, activating the diatomite and the zeolite by heating up method, the experimental result indicates, the diatomite best modified temperature is 600℃ and the removal rate of ammonia nitrogen enhances 71% from 48% before;But the zeolite best modified temperature is 400℃ and the removal rate of ammonia nitrogen reaches 88.6%.Finally, with Ag modifies the diatomite and the zeolite, thej experimental result indicates, the Ag modified diatomite can enhance the separationeffect of ammonia water. On the contrary, the silver-loaded zeolite drops to ammonia nitrogen separation. The Ag modified zeolite is not successful.We employ the prepared silver-loaded diatomite to prepare inorganic membrane;we spread silver-loaded diatomite on the formed membrane tube and form silver-loaded diatomite inorganic membrane. The experimental temperature and the amount of adhesive have influence to the ammonia nitrogen separation effect. Finally, we determined the experimental temperature is 600 °C and the quantity of adhesive is 1²%. Considered the membrane level silver content, the ammonia nitrogen density, the process time, the pH, the orthogonal experiments is employed to determine the best condition of removing ammonia nitrogen in wastewater. The ammonia nitrogen process time is 60min, the ammonia nitrogen density is 6g/L in the waste water, the pH is in the neutrality or in the alkali, the water speed of flow is 1.6L/min and the temperature is 25 "C about.In the research of removing ammonia nitrogen in pollution water source with silver-loaded diatomite, we treat the high density ammonium wastewater with silver-loaded diatomite inorganic membranes. The density of ammonia nitrogen in ammoniated effluent had greatly reduced. Therefore the experiments on adsorbing of ammonia nitrogen in ammoniated effluent were carried out using silver-loaded diatomite. The experiments indicate, after the highly concentrated ammonia nitrogen waste water is carried on two times of modified diatomite processing, the ammonia nitrogen density in wastewater may fall to 1.0mg/L below.