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Multifunctional nitrogen and phosphorus removing agent as well as preparation method and application thereof

A multi-functional technology for nitrogen and phosphorus removal, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. High, affecting the use effect and other problems, to achieve the effect of in-situ repair, easy separation and recovery, and reduce the content of heavy metals

Inactive Publication Date: 2017-12-15
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption material modified with rare earth elements has high phosphorus removal efficiency, but it has the disadvantage of being expensive
Generally speaking, the adsorption phosphorus removal agent may have the disadvantages of low selectivity of the adsorbent, small adsorption capacity, frequent regeneration, and no secondary pollution.
[0005] Because there are certain defects in various phosphorus removal technologies, the single function of phosphorus removal agents also affects its use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Nano Fe 3 o 4 Preparation: Weigh 67.5g FeCl 3 and 69.5g FeSO 4 Dissolve in 250mL and 500mL ultrapure water respectively; FeCl 3 The solution was slowly poured into FeSO 4 Add 800mL of 3mol / L ammonia water dropwise to the solution under ultrasonic conditions at 55°C, and react for 35min; centrifuge to discard the supernatant, and wash with ultrapure water for 4 times; transfer to a vacuum oven at 45°C to dry for 5h, then take out Put it in a sealed bottle for later use;

[0036] 2) Nano Fe 3 o 4 / PAM composite material preparation: 1.50g nanometer Fe was synthesized by in situ polymerization 3 o 4 Add 300mL of ultrapure water into the three-necked flask to dissolve it under ultrasonic and magnetic stirring. After standing still for 0.5h, add 50g of monomer AM and stir it in a water bath at 30°C to dissolve it. Add 0.25g of monomer AM from the condenser. Potassium persulfate initiator in 100mL ultrapure water, and rinse the condenser tube with 100mL ultrapure ...

Embodiment 2

[0042] 1) Nano Fe 3 o 4 Preparation: Weigh 67.5g FeCl 3 and 69.5g FeSO 4 Dissolve in 250mL and 500mL ultrapure water respectively; FeCl 3 The solution was slowly poured into FeSO 4 Add 800 mL of 3 mol / L ammonia water dropwise to the solution under ultrasonic conditions at 55°C, and react for 35 minutes; discard the supernatant by centrifugation, and wash 4 times with ultrapure water; transfer to a vacuum oven at 45°C to dry for 6 hours, and then take out Put it in a sealed bottle for later use;

[0043] 2) Nano Fe 3 o 4 / PFS composite material preparation: 1.0g nano-Fe 3 o 4 The powder was added into 1% 500mL PFS solution, and reacted in a constant temperature water bath at 60°C for 2h while stirring vigorously. Then ultrasonic dispersion was used for 30 minutes, the composite material was separated with a magnet, cleaned with deionized water / ethanol mixed solution, and dried in vacuum for 24 hours;

[0044] 3) Cultivation of biological strains: select cyanobacteria ...

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Abstract

The invention discloses a multifunctional nitrogen and phosphorus removing agent as well as a preparation method and an application thereof. The preparation method of the multifunctional nitrogen and phosphorus removing agent comprises steps as follows: nano Fe3O4 is prepared from ferric chloride and ferrous sulfate with a coprecipitation method, an inorganic polymeric flocculant is deposited on the surface of nano Fe3O4 with a deposition process or an organic polymeric flocculant is deposited on the surface of nano Fe3O4 with an in-situ polymerization method, a nano Fe3O4 / polymeric flocculant composite material is obtained and supported with microbial strains, and the multifunctional nitrogen and phosphorus removing agent is obtained. The agent has quite strong capacity of molecular bonding capture, flocculating settling, biodegradation and adsorption, can synergistically remove nitrogen and phosphorus compounds, organic matter and heavy metal such as Pb(II), Cd(II), Mn(II), Cr(III) and the like in a water body, is low in sludge yield, can rapidly realize solid-liquid separation under the action of external magnetic field force without secondary pollution, is environment-friendly and has good application prospect.

Description

technical field [0001] The invention relates to a sewage treatment agent, in particular to a multifunctional agent for removing phosphorus, nitrogen and heavy metals in a water system, and in particular to a flocculating agent and microorganisms supported on magnetic nano ferric oxide The multifunctional denitrification and phosphorus removal agent and its preparation method and application method belong to the field of sewage treatment. Background technique [0002] In recent years, with the development of my country's economy, a large amount of sewage rich in nitrogen and phosphorus has been discharged into rivers, lakes, oceans and other water environments, which has led to eutrophication of water bodies and even black and odorous water bodies. Among them, phosphorus pollution is a key factor. Due to the use of agricultural nitrogen and phosphorus fertilizers, a considerable amount of nutrients are accumulated in the soil, and they can flow into the adjacent surface water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F9/14C02F101/20C02F101/22C02F101/30C02F1/56C02F1/28C02F1/48
CPCC02F1/28C02F1/488C02F1/56C02F3/34C02F3/348C02F9/00C02F2101/20C02F2101/206C02F2101/22C02F2101/30
Inventor 乔瑞平刘君曾毅夫
Owner AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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