Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for removing nitrate in sewage and application of method

A technology of nitrate and nitrate nitrogen, which is applied in the field of nitrate removal, can solve the problems of substandard and poor nitrate removal effect, and achieve the effect of simple operation, good water effluent effect and high promotion value

Inactive Publication Date: 2018-11-16
HEILONGJIANG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for removing nitrate in sewage, to solve the problem that the existing biological treatment process is not effective in removing nitrate under low temperature conditions and does not meet the standard

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0007] Specific embodiment one: a kind of method for removing nitrate nitrogen in sewage in this embodiment, carry out according to the following steps: one, directly add FeOOH in the sewage containing nitrate, wherein, the dosage of FeOOH is 0.7g / L ; 2. Under the condition of temperature of 5-15 ℃, shake the solution added with FeOOH agent at the oscillation speed of 100r / min for 0.5h; 3. Add polyaluminum chloride to the solution after shaking for 0.5h The flocculant, the dosage of polyaluminum chloride is 0.3g / L; 4. The solution after adding the polyaluminum chloride flocculant is left to settle, that is, the removal of nitrate in the sewage is completed.

[0008] This removal method is simple and convenient to operate, and has a good removal effect on nitrate. The ion exchange effect of FeOOH is used to exchange nitrate nitrogen in water, and then the net trapping and sweeping effect of polyaluminum chloride in the solution is used to realize the removal of nitrate and nitra...

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the dosage of FeOOH in Step 1 is 0.5 g / L. Others are the same as the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: This embodiment is different from Embodiment 1 in that the dosage of FeOOH in step 1 is 0.3 g / L. Others are the same as the first embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for removing nitrate in sewage and an application of the method. The method aims to solve the problem that the nitrate removing effect of existing biological treatmentprocesses under the low-temperature condition is poor and cannot reach the standard. The method comprises the steps as follows: FeOOH is directly added to sewage containing nitrate; the solution withFeOOH added is oscillated at the temperature of 5-15 DEG C and the oscillation speed of 100-200 r / min for 0.5-2 h; polymeric aluminum chloride is added to the oscillated solution; the solution with the polymeric aluminum chloride flocculant is left to stand for precipitation, and nitrate nitrogen in the sewage is removed. The method is simple to operate, materials are easy to obtain, the removalrate of nitrate nitrogen in the sewage can reach 85%-95%, and the promotional value is high.

Description

technical field [0001] The invention relates to the technical field of removing nitrate in sewage. Background technique [0002] Nitrate nitrogen is one of the important causes of water eutrophication. Excessive nitrate nitrogen increases the nutrients in the water body, promotes the vigorous growth of autotrophic organisms, causes the deterioration of water quality, destroys the ecological environment, and ultimately endangers human health. Nitrate nitrogen is one of the important sources of nitrogen-containing pollutants. The treatment of urban domestic sewage and industrial wastewater has received great attention from the state and society. At present, the GB 18918-2002-level A discharge standard requires that the total nitrogen concentration not exceed 15mg / L. In some areas of our country, when the biochemical operation is not good in winter, the total nitrogen is often difficult to control. Moreover, the nitrogen in the biochemical tail water has a tendency to be hig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F101/16
CPCC02F1/5245C02F2101/16
Inventor 朱琦翁明媚邢子鹏万家峰杜世超
Owner HEILONGJIANG UNIV