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Method for degrading nitrogen and phosphorus in water body by coupling carbon dioxide with potassium ferrate

A technology of carbon dioxide and potassium ferrate, applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve unsatisfactory effects, eutrophication of water bodies has not yet come up with excellent methods, and water body conditions are complex and other problems, to achieve the effect of improving the degradation effect

Pending Publication Date: 2022-04-29
JIANGSU OCEAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in engineering practice K 2 FeO 4 The effect of using is not ideal, mainly because K 2 FeO 4 It has certain limitations in some processes when used alone, and the existing research has passed K 2 FeO 4 Combined with other water treatment technologies, such as UV / Fe(VI) synergistic oxidation of phenolic pollutants, ozone-K 2 FeO 4 Combined oxidation of phenol wastewater
However, in reality, the situation of water bodies is complex, and the synergistic method requires different technical combinations to deal with different pollutants, and no excellent method has been developed for eutrophication of water bodies.

Method used

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  • Method for degrading nitrogen and phosphorus in water body by coupling carbon dioxide with potassium ferrate
  • Method for degrading nitrogen and phosphorus in water body by coupling carbon dioxide with potassium ferrate
  • Method for degrading nitrogen and phosphorus in water body by coupling carbon dioxide with potassium ferrate

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Effect test

Embodiment 1

[0036] In this embodiment, the test is carried out by ammonium chloride (NH 4 Cl), potassium dihydrogen phosphate (KH 2 PO 4 ), potassium nitrate (KNO 3 ) and sodium nitrite (NaNO 2 ) simulated wastewater, the concentration of ammonium nitrogen in the wastewater is 20mg / L, the concentration of nitrate nitrogen and nitrite nitrogen is 1mg / L, and the concentration of phosphate is 2mg / L. The pH of the pure water used in the test is 6.5, and three factors (pH, K 2 FeO 4 Dosage, reaction time), each factor has 4 levels. The pH is lowered by the introduction of CO 2 , the pH increase is achieved by adding NaOH, and the results of the orthogonal test are analyzed as follows:

[0037] Table 1 CO 2 Coupling K 2 FeO 4 Degradation of NH 4 -N test results

[0038]

[0039] It can be seen from Table 1 that during the test, K 2 FeO 4 Ammonium nitrogen (NH 4 -N) The degradation effect is up to 13.35%, and the reduction of pH value has no significant effect on the removal ef...

Embodiment 2

[0050] Such as figure 2 As shown, the research area of ​​this example is located in the river channel (34.61°N, 119.22°E) on the north side of Jinying International Community, Haizhou District, Lianyungang, Jiangsu, and the main source of pollution is domestic sewage in the community. There is a passing culvert under the Huaguoshan Avenue of the river, and there is a pumping station under the culvert to pump water to the Hang Lung Sewage Treatment Plant. However, the Henglong Sewage Treatment Plant has been overloaded, and the current pumping station cannot completely discharge the sewage, so the generated sewage overflows from the pumping station to the river, flows to the west side, and flows to the current restoration river section, and then flows to Dongyan River, causing the water in the East Salt River to exceed the standard. The main pollutants are ammonia nitrogen, total nitrogen, total phosphorus, NH in water 4 -N is 20-23mg / L, NO 2 -N is 0.7-1mg / L, NO 3 -N is 0....

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Abstract

The invention provides a method for degrading nitrogen and phosphorus in a water body by coupling carbon dioxide with potassium ferrate, which comprises the following steps: sewage is added into a conical flask through a water inlet on the side wall of the conical flask, the pH value of the sewage is detected, then the conical flask is sealed, the top end of the conical flask is communicated with the top end of a carbon dioxide gas cylinder through a pipeline, and the carbon dioxide gas cylinder is communicated with the conical flask through a pipeline; a valve is arranged on the pipeline close to the carbon dioxide gas cylinder, carbon dioxide is continuously introduced into the conical flask by adjusting the flow of carbon dioxide, and then the valve is closed; adding potassium ferrate into the conical flask, stirring, and then standing for precipitation; the treated water body is discharged through a water outlet in the side wall of the conical flask; according to the method, the pH value of the water body is reduced by introducing carbon dioxide into the water body, so that the oxidability of potassium ferrate on nitrogen and phosphorus in the water body is better exerted, and the result shows that the influence on the removal effect of ammonium nitrogen and nitrate nitrogen is not obvious, but the degradation effect on nitrite nitrogen and phosphate is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of water body environment, in particular to a method of using carbon dioxide (CO 2 ) coupled with potassium ferrate to degrade nitrogen and phosphorus in water. Background technique [0002] The eutrophication of the water body is mainly due to the increase of nitrogen and phosphorus in the water body, which causes the rapid reproduction of algae and plankton, reduces the dissolved oxygen content of the water body, and leads to the deterioration of water quality. With human activities, a large amount of pollutants containing nutrients such as nitrogen and phosphorus flow into rivers, rivers, lakes, and sea waters, and the water body nitrogen is mainly composed of ammonium nitrogen (NH 4 -N), nitrate nitrogen (NO 3 -N) and nitrite nitrogen (NO 2 -N), phosphorus is mainly composed of phosphate (PO 4 -P) mainly. At present, there are bioremediation methods, physical adsorption methods and chemical oxidatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/10C02F101/16
CPCC02F9/00C02F1/66C02F1/72C02F1/50C02F1/5236C02F2001/007C02F2101/166C02F2101/105
Inventor 吴海龙李雪兵王开春田凤蓉张婧伟徐军田
Owner JIANGSU OCEAN UNIV
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