Zeolite

Zeolite Zeolite is a group of natural or synthetic hydrated aluminosilicate minerals which contain alkali and alkaline metals. It is characterized by a framework structure that encloses interconnected cavities occupied by ion-exchangeable large metal cations and water molecules permitting reversible dehydration. Zeolite is recommended in detergent manufacturing for the applications of the removal of hardness and heavy metal ions and neutralisation of acid waters. Zeolite is a silicate mineral, It is a crystal formed by the volcanic eruption. It has well-developed gap, Strong adsorption which is an inorganic substance ion removal agent, In water treatment it can also exchange with others balance weight of metal ions in order to reduce the hardness of water. In addition, it also has the features with large area and strong internal electrostatic which can make you water quality achieve the water quality of discharge and drinking water quality compliance of high-tech goods. Natural zeolite (clinoptilolite)The natural zeolite is alumino silicate mineral, and it is white or brick red, and it belongs to weak acid cation exchange agent. It is possessed by man-made leading active constitutes with new cation exchange or absorption ability, so its absorption volume also increases. It can be mainly used in middle and small boiler water’s soften treatment, in order to remove the Ca Mg ion and decrease the growth of the incrustation, the corrosion of the metal, so as to lengthen the boiler’s lifetime. In the waste water treatment, it can remove the P and Pb. When it loses efficiency, it can be reused after it has been reverse flowed by heavy salty water. The natural ’s characteristics and index: Specific weight g/cm3 2.0 2.6 Mud % ≤1.0 Volume weight g/cm3 1.6 Moisture % ≤1.5 Wear rate % ≤1.0 Na+ exchange capacity g/cm3 ≥800 2. Activate zeolite filter media 　Activate zeolite is made from the natural zeolite by many special techniques. Its absorption ability is stronger than the natural zeolite, and its cation exchange ability is also very good. So it can not only remove the turbidity, color and stink in the water, also can remove the harmful heavy metal, such as Zn, Hg, Fe cation and organic matter. It also avails to remove kinds of polluted matters, and its lixivium doesn’t include neither poison nor harmful matter. It especially is notable for removing the iron and the fluorine in the water. In short, it is a good and idea filter for industrial and waste water treatment. Characteristics: Density g/cm3 1.8 2.2 Filter race m/h 4 12 Volume weight g/cm3 1.4 Wear % <0.5 Holes % ≥50 Broken race % <1.0 Specific surface area m2/g 500 800 Mud content % <1.0 Dissolve race of HCl% ≤0.1 Total exchange volume mg/g 2.2 2.5 Usage and analysis of aeration biological filter pond. Using zeolite as BAF filter can effectively remove COD, NH4 and turbidity, the best water load is 2.2m/h when it is tested. This time, the removal percentage fo COD, NH4 and turbidity is 73.9%, 88.4% and 96.2%. the average concentration is 43.4mg/L, 3.5mg/L and 3.7NTU, Which can reach the colden recycle water’s concerned indexes proposed by the national environmental protection Bureau and TianJin University. Zeolite and sand filter can treat textile waste water as BAF filter. The cell counting result shows that nitrosoation Xanthomonas and nitrobacterium’s quantity are 3.0×108and 2.2×109 CFU/mL But the nitrosoation and xanthomonas growing on the sand filter is 4.5×108 and 6.5×108 CFU/mL. From the gems quantity’s point of view, the zeolite filter is more suitable for micro biological organisms to nitrify. From the point of removing organism and TKN, the effect of BAF Using zeolite as filter can remove COD from textile waste water to a percentage of 86% 92% and remove color to a percentage of 77%-79%. This is because that the natural zeolite filter’s specific area is larger than sand filter, and it is suitable for the micro organism to attach, also the zeolite filter’s cation exchange ability is strong, so it can absorb NH4+ in water. The growth of the Xanthomonas which can adapt to the environment can make the NH4+ to transfer into nitrates. The granular diameter can be made according to the requirement, the water flowing current is good, filter cycle is long, back washing can be easily done, and the intercepting dust ability is also very strong. Zeolite is a silicatemineral, which is a crystal produced by volcano eruption. It has many pores, and its adsorption ability is very strong, also it is an inorganic cation exchange agent. It has a good removal function to remove NH4-N. It can also exchange kation in the water to lower the hardness of the water such as Ca+, Mg+, Cs+, Na+ ect. Furthermore, zeolite has high mechanical strength, large specific surface area, strong internal static electricity to make the water meet the drainage and drinking standard. We have white, red, and gray dark three type of natural zeolite for water treatment.