Porous dephosphorization material for distributed sewage treatment, and preparation method and application thereof
A technology for dispersing sewage and water treatment, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of small adsorption capacity and low adsorption efficiency, and achieve easy operation and improved Adsorption efficiency and adsorption capacity, effect of increasing active sites
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Embodiment 1
[0039] The autoclaved lightweight concrete particles were dried in an oven at 80 °C for 2 h, and then taken out, and then mixed with ZrOCl 2 ·8H 2 O is the source of zirconium. Weigh 468.4 g of autoclaved lightweight concrete particles and add them to 10 L of pre-configured zirconium oxychloride solution with a zirconium concentration of 0.05 mol / L. After mechanical stirring for 2.5 hours, add NaOH solution to adjust the pH value to 9.0, after continuing to stir for 1h. The material was taken out and placed in an oven at 105°C for 4 hours to obtain a phosphorus-removing porous material.
[0040] To test the phosphorus adsorption capacity of the above materials, the method is as follows:
[0041] In order to verify the phosphorus removal performance of the obtained materials at different phosphorus concentrations, potassium dihydrogen phosphate was used to prepare standard solutions with phosphorus concentrations of 5mg / L, 20mg / L, 60mg / L, 100mg / L, and 150mg / L, and the actual ...
Embodiment 2
[0048] The autoclaved lightweight concrete particles were dried in an oven at 105 °C for 2 h and then taken out, and the Zr(NO 3 ) 4 ·5H 2 O is the source of zirconium. Weigh 473.1g of autoclaved lightweight concrete particles and add them to 10L of pre-configured zirconium nitrate solution with a zirconium concentration of 0.02mol / L. After mechanical stirring for 2.5 hours, add NaOH solution to adjust the pH value to 8.3. After stirring for 1h. The material was taken out and placed in an oven at 105°C for 4 hours to obtain a phosphorus-removing porous material.
[0049] According to the method described in Example 1, the phosphorus adsorption capacity of the obtained porous material for phosphorus removal was tested.
[0050]The results obtained are shown in Table 2. It can be seen that the adsorption capacity of the obtained material in different concentrations of phosphorus solutions has been significantly improved, and the adsorption capacity has increased by nearly 35%...
Embodiment 3
[0054] The phosphorus-removing porous material obtained in Example 1 is applied to a distributed sewage treatment device to treat domestic sewage and to adsorb phosphorus. Load the porous material for phosphorus removal into the adsorption device (such as image 3 As shown), the adsorption device is installed at the end of the dispersed sewage treatment equipment. The water inflow of the adsorption device is the outlet water of the dispersed sewage treatment equipment. The hydraulic retention time of the adsorption device is 72h. Zhou) The change of phosphorus concentration in and out of the adsorption device, the obtained results are shown in Table 3.
[0055] It can be seen from Table 3 that the porous material for phosphorus removal has excellent phosphorus adsorption capacity, and the phosphorus concentration in the effluent is below 1 mg / L, which meets the requirements of Class I B in the Discharge Standard of Pollutants for Urban Sewage Treatment Plants (GB18918-2002). ,...
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