Composite phosphorus removal material based on collophanite and application method thereof

An application method, collophosite technology, applied in the field of phosphorus pollution control, can solve the problems of low phosphorus fixation efficiency, difficulty in applying domestic sewage and farmland water return treatment, etc., and achieve the effect of improving phosphorus removal effect, pore development, and sufficient contact

Pending Publication Date: 2020-08-11
陈赫然
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above chemical dosing precipitation method and adsorption method are not suitable for advanced domestic sewage treatment, urban initial rainwater treatment, eutrophic river water treatment, and farmland dewatering treatment.
Constructed wetlands and submersible filtration systems are potential technical methods for treating eutrophic water, but the difficulty lies in the low fixation efficiency of phosphorus by ordinary sandstone and other materials, and chemically precipitated calcium phosphorus, aluminum phosphorus, and iron phosphorus are not Phosphorus in a stable state, which will be released into the water again due to changes in pore water composition and pH

Method used

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  • Composite phosphorus removal material based on collophanite and application method thereof
  • Composite phosphorus removal material based on collophanite and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 50kg of colloidal ore was purchased from a phosphate mine, and its mineral composition was obtained by chemical phase analysis: 70.4% apatite, 15.7% dolomite, and 13.9% quartz. The apatite morphology was as follows figure 1 shown.

[0030] 50kg of anhydrite ore was collected from Hanshan, and its mineral composition was obtained by chemical phase analysis: 96.4% of anhydrite, 2.6% of dolomite, and 1% of quartz.

[0031] 50 kg of calcined magnesite was purchased from Liaoning, and its mineral composition was obtained by chemical phase analysis: 88.4% of periclase and 11.6% of talc.

[0032] The three raw materials were crushed and sieved respectively to obtain particles with a particle size of 0.5-1mm, and then mixed uniformly according to the mass percentage of 40% of collophanite particles, 20% of calcined magnesite particles, and 40% of anhydrite particles, that is A composite phosphorus removal material for filtration is obtained.

[0033] Pack the composite phosph...

Embodiment 2

[0037] In this example, the same raw materials of calcined magnesite and anhydrite as in Example 1 were used, which were crushed and sieved respectively to obtain particles with a particle size of 0.8-2 mm.

[0038] 5kg of low-grade collophosite ore was collected, and its mineral composition was obtained by chemical phase analysis: 37.8% apatite, 39.3% dolomite, and 22.7% quartz. It is crushed and sieved to obtain particles with a particle size of 1-2mm.

[0039] Put the collophanite particles in a muffle furnace for calcination at 800°C for 1 hour, the dolomite in it is completely decomposed into periclase, rinse with water for 5 minutes after cooling, and dry to obtain calcined collophanite ore.

[0040] According to the mass percentages of 60% of calcined collophanite, 10% of calcined magnesite particles and 30% of anhydrite particles, the three raw materials are evenly mixed to obtain a composite phosphorus removal material for filtering.

[0041] Fill the prepared compos...

Embodiment 3

[0043] In this example, the same collianite and anhydrite raw materials as those in Example 1 were used, which were crushed and sieved respectively to obtain particles with a particle size of 0.8-2 mm.

[0044] The dolomite is crushed and sieved to obtain particles with a particle size of 1-2mm, which are calcined in a muffle furnace at 800°C for 1 hour, and then placed in a humid air environment for more than 10 days to obtain calcined dolomite particles.

[0045] According to the mass percentages of 20% collophosite particles, 30% calcined dolomite particles and 50% anhydrite particles, the three raw materials are evenly mixed to obtain a composite phosphorus removal material for filtration.

[0046] Pack the composite phosphorus removal material prepared in this embodiment into a plastic pipe with a diameter of 5 cm and a height of 50 cm to form a water treatment filter column. The simulated phosphorus-containing water with a phosphorus concentration of 4 mg / L prepared with ...

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Abstract

The invention discloses a composite phosphorus removal material based on collophanite and an application method of the composite phosphorus removal material. The composite phosphorus removal materialis a granular material prepared by taking collophanite, a material rich in active magnesium oxide and calcium sulfate as main raw materials. The obtained material is used as a filtering and percolating medium material for phosphorus removal, is used for deep phosphorus removal of phosphorus-rich water such as domestic sewage, black and odorous water bodies and farmland water, and has the advantages of wide raw material source, low material preparation cost and good phosphorus removal effect.

Description

technical field [0001] The invention relates to phosphorus pollution control technology of waste water and surface water body, in particular to a material for removing phosphorus in water. Background technique [0002] The eutrophication of water body is becoming more and more serious, and it is necessary to strengthen the deep purification treatment of phosphorus in water. At present, the aerobic activated sludge process is generally used in the treatment of urban domestic sewage. In many cases, it is difficult for domestic sewage to meet the national Class A discharge standard after secondary treatment. Advanced treatment facilities need to be added to ensure that the effluent meets the standard. And even if domestic sewage treatment meets the drainage standard, for eutrophic water bodies, more stringent phosphorus removal is required to ensure the ecological environment of the water bodies. The secondary treatment effluent of domestic sewage treatment plants needs to fur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C01B25/32C02F101/10
CPCC02F1/58C01B25/32C02F2103/007C02F2101/105
Inventor 陈赫然陈天虎汝琳琳
Owner 陈赫然
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