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A method for deep removal of phosphorus in water by calcined siderite

A technology of siderite and water removal, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc., can solve problems such as high price, little prospect, and waiting for development

Active Publication Date: 2018-06-15
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorption materials modified with rare earth elements have high phosphorus removal efficiency, but are expensive and have little prospect for popularization and application
Inexpensive and efficient adsorbents for phosphorus removal are still to be developed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Select sedimentary siderite ores with a siderite content greater than 60%;

[0020] Crush and sieve siderite ore to obtain siderite particles with a particle size between 1-2mm;

[0021] Calcining the above-mentioned siderite particles at 600-700°C to rapidly decompose them into hematite to obtain nanostructured calcined siderite particles;

[0022] Fill the above-mentioned calcined siderite particles into a filter column with a diameter of 100mm and a height of 1500mm, as a simulated deep phosphorus removal filter tank, with a filling height of 1000mm;

[0023] The simulated water with a phosphorus concentration of 10mg / L prepared from tap water was used as the experimental water, and flowed through the above-mentioned simulated deep phosphorus removal filter with a hydraulic retention time of 1h. It was detected that the phosphorus concentration in the water was always less than 0.1mg / L until it was operated for 8 months. After the effluent phosphorus concentration b...

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Abstract

The invention discloses a method for deeply removing phosphorus in water by calcining siderite, which is characterized in that: siderite particles with a particle size between 0.5-3mm are calcined at 500-850°C to quickly decompose them into hematite ore to obtain nanostructured calcined siderite particles; then the calcined siderite particles are filled into the deep phosphorus removal filter tank as a phosphorus removal adsorbent to absorb and remove trace amounts of phosphate in the water, and the phosphorus concentration in the effluent reaches the third-class standard for surface water bodies .

Description

1. Technical field [0001] The invention relates to a method for deeply removing phosphorus from domestic sewage and ground water. 2. Background technology [0002] With the aggravation of water pollution, eutrophication has generally occurred in surface water bodies in my country. The state has set up a major special project for water pollution control to conduct research, invested huge sums of money in the construction of urban sewage treatment facilities, and improved the treatment rate of urban domestic sewage. However, at present, the aerobic activated sludge process is generally used in the treatment of urban domestic sewage, but the concentrations of total nitrogen and total phosphorus in the effluent water of aerobic biological treatment still reach 20-35 mg / L and 0.3-3.0 mg / L respectively, which are the main factors for lake water. 10-50 times of the second standard. In many cases, it is difficult for domestic sewage to meet the national first-class A discharge sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F3/30C02F101/16
Inventor 陈天虎邢波波陈斌邹雪华庆承松
Owner HEFEI UNIV OF TECH
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