Method for simultaneously recovering phosphorus and removing antibiotics in water body based on sludge-based biochar

A technology of antibiotics and biochar, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problem that phosphorus recovery products are easily contaminated by antibiotics, and solve the problem of sludge treatment and disposal, The effect of high-efficiency catalytic degradation performance and excellent adsorption performance

Pending Publication Date: 2021-08-31
HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method based on sludge-based biochar that can simultaneously recycle phosphorus and remove antibiotics in water bodies for the purification of complex polluted water bodies and the problem that phosphorus recovery products are easily contaminated by antibiotics

Method used

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  • Method for simultaneously recovering phosphorus and removing antibiotics in water body based on sludge-based biochar

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Experimental program
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Effect test

Embodiment 1

[0016] Put the plate and frame filter sludge (moisture content 40%, organic matter content 35%, iron element content 4%, magnesium element content 2%, aluminum element content 5%) of urban sewage treatment plant into a porcelain crucible, cover it Placed in a muffle furnace, after 400 oC Calcined at high temperature for 2 hours and then naturally lowered to room temperature to obtain MBC air -400.

[0017] 30 mg MBC air -400 was added to 30 mL of composite polluted wastewater containing 5-200 mg / L phosphorus and 20 µg / L tetracycline, and 0.1 mM oxidant PMS was added at the same time to conduct simultaneous phosphorus adsorption and antibiotic degradation experiments. The results of the study showed that MBC air The adsorption capacity of -400 for phosphorus is 30 mg / g, and the removal rate of antibiotics is over 99%.

Embodiment 2

[0019] Put the plate and frame filter press sludge (moisture content 60%, organic matter content 55%, iron element content 8%, magnesium element content 0.4%, aluminum element content 0.2%) of the papermaking sewage treatment plant in a porcelain boat, and put it in a tube In the furnace, under nitrogen atmosphere, after 800 oC Calcined at high temperature for 2 hours and then naturally lowered to room temperature to obtain PBC N2 -800.

[0020] 30 mg PBC N2 -800 was added to 300 mL of composite polluted wastewater containing 5-200 mg / L phosphorus and 1000 µg / L sulfamethazine, and 1 mM oxidant PMS was added at the same time to conduct simultaneous phosphorus adsorption and antibiotic degradation experiments. The results of the study showed that PBC N2 The adsorption capacity of -800 for phosphorus is 85 mg / g, and the removal rate of antibiotics is over 99%.

Embodiment 3

[0022] Put the sludge discharged from the sewage treatment plant in the industrial park (water content 50%, organic matter content 45%, iron element content 10%, magnesium element content 1%, aluminum element content 0.5%) in a porcelain boat, placed in a tubular In the furnace, under vacuum conditions after 600 oC Calcined at high temperature for 2 hours and then naturally lowered to room temperature to obtain IBC vac -600.

[0023] 30 mg IBC vac -600 was added to 60 mL of composite polluted wastewater containing 5-200 mg / L phosphorus and 500 µg / L ciprofloxacin, and 0.5 mM oxidant H 2 o 2 , for simultaneous phosphorus adsorption and antibiotic degradation experiments. The results of the study showed that IBC vacThe adsorption capacity of -600 for phosphorus is 12 mg / g, and the removal rate of antibiotics is above 99%.

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Abstract

The invention discloses a method for simultaneously recovering phosphorus in a water body and removing antibiotics based on sludge-based biochar, and belongs to the field of sludge resource utilization and the field of compound polluted water body purification. The method comprises the following steps: (1) taking sludge generated in a sewage treatment process as a main raw material, and preparing sludge-based biochar through the steps of anoxic pyrolysis, drying, grinding and the like; (2) adding the sludge-based biochar obtained in the step (1) into a phosphorus and antibiotic combined polluted water body, then adding an oxidizing agent, transferring and enriching phosphorus in the water body to the surface of the sludge-based biochar through an adsorption effect, and removing antibiotics from the water body through a catalytic oxidation reaction; and (3) carrying out solid-liquid separation on the suspension obtained in the step (2) to complete purification treatment on the phosphorus and antibiotic combined pollution water body and obtain the sludge-based biochar which is rich in phosphorus and free of antibiotic pollution. The method has a wide application prospect in the fields of sludge resource utilization and combined polluted water body purification.

Description

technical field [0001] The invention relates to a method based on sludge-based biochar that can simultaneously recover phosphorus and remove antibiotics in water bodies, and belongs to the field of sludge resource utilization and the field of complex polluted water body purification. Background technique [0002] Phosphorus, as a non-renewable and irreplaceable mineral resource, is facing a crisis of increasing shortage as the global demand for food and phosphate fertilizers increases. Phosphate rock has been listed by my country as one of the 20 minerals that cannot meet the needs of national economic development after 2010. Corresponding to the shortage of phosphorus resources, phosphorus, as one of the three major nutrients, can easily cause eutrophication of water bodies after being discharged into natural water bodies with wastewater. Therefore, using technical means to recover phosphorus from wastewater has become one of the research focuses in recent years. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/28C02F1/72C05G3/40C05G3/80C02F101/10
CPCC02F1/283C02F1/725C02F1/722C05G3/40C05G3/80C02F2101/105
Inventor 王静杨育红寇丽栋田振邦田之涯赵亮段文杰黄做华
Owner HENAN ACADEMY OF SCI CHEM RES INST CO LTD
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