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Siderite-based nitrogen and phosphorus removal material and application method thereof

A simultaneous denitrification and dephosphorization, siderite technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of high price and little prospect, and achieve high porosity , Strengthen the effect of chemical adsorption and effect

Active Publication Date: 2014-05-21
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0012] Choose siderite ore, the siderite content is not less than 60%.

[0013] Crushing the siderite ore through 40 meshes;

[0014] According to the mass percentages of siderite powder, cement binder, and pulp fiber porogen are as follows: siderite powder 91%, binder 8%, porogen 1%, weigh the material, mix evenly, add the mass of the mixture Stir evenly with 25% water, use a ball forming machine to form the mixture into balls, the diameter of the ball is 3-8mm, and maintain at room temperature and 100 saturated humidity for more than 20 days;

[0015] Fill the prepared particles into the water treatment column, inoculate and enrich the nitrate-dependent iron-oxidizing bacteria culture, and the ODP value of the bacteria solution is greater than 0.2;

[0016] The volume of the bacterial solution is 2% of the volume of the experimental column, and the culture medium in the experimental column is circulated with a peristaltic pump for 5 days, and the nitrate concentration in th...

Embodiment approach 2

[0020] Choose siderite ore, the siderite content is not less than 60%, crushed through a 100-mesh sieve;

[0021] According to the following mass ratio ingredients: 83% siderite powder, 15% cement binder, 2% foaming agent and surfactant thereof, the foaming agent is such as aluminum powder, and the surfactant is alkylbenzene sulfonate salt;

[0022] Then add water with a mass ratio of 30% of the mixed material, mix evenly, shape into 4~8mm particles, and maintain at room temperature and saturated humidity for more than 20 days;

[0023] Fill the prepared particles into the water treatment column, inoculate and enrich the nitrate-dependent iron-oxidizing bacteria culture, and the ODP value of the bacteria solution is greater than 0.2;

[0024] The volume of the bacterial solution is 2% of the volume of the experimental column, and the culture solution in the experimental column is circulated with a peristaltic pump for 5 days, and the nitrate concentration in the system is mai...

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Abstract

The invention discloses a preparation method and applications of a siderite-based nitrogen and phosphorus removal material. The preparation method is implemented through steps of crushing siderite ores, enabling the obtained ores to pass through a 40-mesh sieve, and adding a foaming agent into siderite ore powder in an appropriate proportion of the siderite ore powder, a binder and a pore-foaming agent or in an appropriate proportion of the siderite ore powder and a binder so as to obtain a porous granular material taking the siderite ore powder as a main body; and the porous granular material has the characteristics of high particle strength, high porosity, large specific surface area, large microbial load, and the like. The material is a microbial carrier, an anaerobic microorganism electron donor and a phosphorus removal adsorbent. The material is fed in a fixed bed to treat wastewater by way of filtering, and vaccinates nitrate-depended iron-oxidizing-bacteria-based anaerobic strain liquid, and under anaerobic conditions, microorganisms reduce nitrates into nitrogen by taking ferrous irons in siderite as electron donors, and the adsorption effect on phosphorus is enhanced. The material is mainly used for synchronously removing nitrate nitrogen and phosphates in wastewater.

Description

1. Technical field [0001] The invention relates to a method for advanced treatment of slightly polluted source water. 2. Background technology [0002] Due to my country's rapid economic development and accelerated urbanization, a large amount of nutrients nitrogen and phosphorus have entered lakes and other water bodies, resulting in serious eutrophication in lakes such as Chaohu Lake, Taihu Lake, Dianchi Lake and urban landscape water bodies. In order to control environmental pollution, the state has invested heavily in the construction of urban sewage treatment facilities to increase the treatment rate of urban domestic sewage. However, at present, the aerobic activated sludge process is commonly used in urban domestic sewage treatment, and scholars at home and abroad are also vigorously studying biological phosphorus removal technology, but the concentrations of total nitrogen and total phosphorus in the biologically treated water still reach 20-35mg / L and 0.3 mg / L, resp...

Claims

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Application Information

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IPC IPC(8): B01J20/06C02F3/00C02F3/30C02F1/28
Inventor 陈天虎邢波波杨哲庆承松谢晶晶
Owner HEFEI UNIV OF TECH
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