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A method for deep purification of phosphorus in water
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A deep purification and filter technology, applied in chemical instruments and methods, water pollutants, neutralized water/sewage treatment, etc., can solve problems such as low adsorption capacity, limited adsorption capacity, and undeveloped phosphorus removal materials.
Active Publication Date: 2017-06-06
HEFEI UNIV OF TECH
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Problems solved by technology
[0005] The advanced treatment of trace phosphorus in water is generally treated by adsorption. The current problem is that the adsorption capacity of phosphorus removal adsorbents for low concentration phosphorus is low, and cheap and efficient adsorption and removal of phosphorus materials are still to be developed.
[0006] Although the above adsorption materials are economically cheaper than the use of precipitants and flocculants to a certain extent, the adsorption mechanism itself limits its adsorption capacity, and there are still deficiencies in deep phosphorus removal.
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Embodiment 1
[0025] Such as figure 2 As shown, in this embodiment, the water to be dephosphorized with a phosphorus concentration of 5 mg P / L is used as simulated water, and it is carried out in depth according to the following steps:
[0026] Choose chalky clayey dolomite as raw material, in which SiO 2 The molar ratio with CaO is in the range of 1:1-1.2;
[0027] Clayy dolomite is crushed and sieved to obtain 1-2mm clayey dolomite particles;
[0028] calcining clayey dolomite particles at 800°C for 60 minutes to obtain calcined clayey dolomite particles;
[0029] The calcined clay dolomite particles are filled in a glass column A with a diameter of 2 cm and a height of 30 cm;
[0030] Pack uncalcined clayey dolomite particles in a glass column B with a diameter of 2 cm and a height of 100 cm;
[0031] Part of the water to be dephosphorized flows through glass column A and then enters glass column B, and part of the water to be dephosphorized directly enters glass column B;
[0032]...
Embodiment 2
[0034] In order to detect the relationship between phosphorus removal efficiency and clayey dolomite calcination temperature, the following tests were performed:
[0035] Choose chalky clayey dolomite as raw material, in which SiO 2 The molar ratio with CaO is in the range of 1:1-1.2;
[0036] Crushing and sieving the clayey dolomite to obtain 1-2mm clayey dolomite particles E;
[0037] The clayey dolomite particles were calcined at 400°C, 500°C, 600°C, 700°C, and 800°C for 60 minutes to obtain calcined clayey dolomite particles E400, E500, E600, E700, and E800.
[0038] The 1000 mg P / L stock solution was diluted to 5 mg P / L with 0.01 M NaCl electrolyte solution. Accurately weigh 0.1g of the above-mentioned experimental materials into a 150ml Erlenmeyer flask, add 50ml of 5mg P / L simulated phosphorus-containing wastewater, seal the Erlenmeyer flask and place it in a constant temperature oscillator in a water bath, and shake it at 180r / min for 2h at 25°C , centrifuge the mix...
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Abstract
The invention discloses a method for deeply purifying water containing phosphorus. The method is characterized in that chalky clayey dolomite ores are crushed and screened to obtain granules with the granular size ranging from 0.5 mm to 10 mm, and the granules are calcined at the temperature of 700-1000 DEG C to obtain calcined granules; the calcined granules and non-calcined granules are respectively arranged into a filter pond A and a filter pond B, a part of water flows through the filter pond A and then flows into the filter pond B, a part of water directly flows into the filter pond B, a pH value of outflow water of the filter pond A is stabilized to be 10-11 by regulating the filtering speed of the filter pond A and adding new materials, a pH value of outflow water of the filter pond B is 8.7-9.0, and the phosphorus concentration of the outflow water of the filter pond B is kept to be below 0.2 mg / L.
Description
[0001] 1. Technical field [0002] The invention relates to a water phosphorus removal treatment method, including the phosphorus removal treatment of industrial phosphorus-containing wastewater, domestic sewage, and eutrophic landscape water bodies. [0003] 2. Background technology [0004] With the aggravation of water pollution, eutrophication has generally occurred in surface water bodies in my country. This requires more stringent phosphorus removal treatment of sewage. Domestic sewage and industrial wastewater generally use biological treatment to reduce the concentration of phosphorus in the drainage. Even if the treated secondary effluent reaches the first-level A standard, the phosphorus concentration in it is still 0.3-0.5mg / L, which is the standard for the second-class water body on the ground. 15-25 times the phosphorus concentration. Therefore, many sewage treatment plants need chemical phosphorus removal to assist biological phosphorus removal to ensure that th...
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