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Preparation method of biomass carbon composite material for removing phosphorus in wastewater

A technology of biomass carbon and composite materials, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of high equipment requirements, high reaction temperature, harsh conditions, etc., and achieve low cost, Mild reaction conditions and good stability

Active Publication Date: 2014-04-16
BIOGAS SCI RES INST MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Elements such as calcium, iron, magnesium, aluminum and lanthanum have been widely used in the preparation of high-efficiency phosphorus adsorption materials. At present, the doping of these elements in high-efficiency phosphorus adsorption materials is mainly through high-temperature pyrolysis of biomass, but high-temperature pyrolysis method There are defects such as high reaction temperature, harsh conditions, high requirements for equipment, and high cost

Method used

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  • Preparation method of biomass carbon composite material for removing phosphorus in wastewater
  • Preparation method of biomass carbon composite material for removing phosphorus in wastewater
  • Preparation method of biomass carbon composite material for removing phosphorus in wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 30 mL of 0.01 M LaCl to a 50 mL Teflon jar 3 Add 1.5g of rice straw to the solution, stir thoroughly for 30min, add 0.3mL 1M KOH, continue stirring for 30min, and finally hydrothermally carbonize at 140°C for 4h. After the hydrothermal carbonization was completed, the hydrothermal reaction kettle was taken out from the oven, cooled to room temperature in the air, and the resulting product was filtered with a 0.45 μm filter membrane, and then washed twice with deionized water and ethanol respectively, and then heated at 60 Dry at ℃ to constant weight, pass through a 40-mesh sieve for later use.

Embodiment 2

[0027] Add 30 mL of 0.1 M LaCl to a 50 mL Teflon jar 3 solution, add 4.5 g of rice straw, stir thoroughly for 30 min, add 4.5 mL of 3M KOH, continue stirring for 80 min, and finally hydrothermally carbonize at 200 °C for 30 h. After the hydrothermal carbonization was completed, the hydrothermal reaction kettle was taken out from the oven, cooled to room temperature in the air, and the obtained product was filtered with a 0.45 μm filter membrane, and then washed twice with deionized water and ethanol respectively, and then heated at 105 Dry at ℃ to constant weight, pass through a 120-mesh sieve for later use.

Embodiment 3

[0029] Add 30 mL of 0.2 M CaCl to a 50 mL Teflon jar 2 Add 6g of kitchen waste to the solution, stir thoroughly for 30 minutes, then add 7.5 mL of 6M KOH, continue stirring for 120 minutes, and finally hydrothermally carbonize at 280°C for 48 hours. After the hydrothermal carbonization is completed, the hydrothermal reaction kettle is taken out from the oven, cooled to room temperature in the air, and the resulting product is filtered with a 0.45 μm filter membrane, and then washed twice with deionized water and ethanol respectively, and then heated at 120 Dry at ℃ to constant weight, pass through a 180-mesh sieve for later use.

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Abstract

The invention provides a preparation method of a biomass carbon composite material for removing phosphorus in wastewater. The preparation method comprises the steps of adding waste biomass into a metal salt solution to stir and mix evenly, then adding an alkali solution to continuously stir for 30-120 minutes, then performing hydrothermal carbonization, cooling a product to room temperature after reaction is ended, filtering, washing unreacted substances on the surface by using water and / or ethyl alcohol, then drying to constant weight at a temperature of 60-120 DEG C and sieving through a sieve with 40-180 meshes to obtain the biomass carbon composite material. According to the preparation method, the waste biomass serves as the raw material, so that the preparation method is low in cost; due to the adoption of hydrothermal carbonization, the preparation method is warm in reaction condition and simple in whole preparation process; and the prepared biomass carbon composite material is good in stability and efficient in phosphorus removal effect.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and relates to a method for preparing a biomass-carbon composite material, in particular to a method for preparing a biomass-carbon composite material for wastewater phosphorus removal by using a hydrothermal carbonization method. Background technique [0002] Phosphorus is one of the main elements that cause eutrophication in water bodies. Controlling phosphorus elements is more effective in controlling water body eutrophication than controlling nitrogen elements. In water bodies polluted by phosphorus, algae blooms in large numbers, dissolved oxygen drops sharply, and water quality becomes smelly. It affects the survival of aquatic organisms such as fish; phosphorus is also a limiting factor for the biological stability of water quality in water distribution systems, and its removal in water supply treatment has also received more and more attention. On the other hand, phosphorus f...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58
Inventor 代立春何明雄胡启春王文国吴波
Owner BIOGAS SCI RES INST MIN OF AGRI
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