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A method for simultaneous removal of manganese and nitrate in groundwater

A groundwater and nitrate technology, applied in chemical instruments and methods, contaminated groundwater/leachate treatment, water pollutants, etc., can solve problems such as excessive pollutants, and achieve strong adaptability, high biological activity, and operating costs. low effect

Active Publication Date: 2020-04-24
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a method for synchronously removing groundwater manganese and nitrate pollutants using biological methods, effectively solving the problem of groundwater Mn 2+ and NO 3 - The problem of excessive pollutants

Method used

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  • A method for simultaneous removal of manganese and nitrate in groundwater
  • A method for simultaneous removal of manganese and nitrate in groundwater
  • A method for simultaneous removal of manganese and nitrate in groundwater

Examples

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Embodiment 1

[0032] This example provides a method for simultaneously removing manganese and nitrate from groundwater. The groundwater to be treated in Example 1 comes from the self-use groundwater of a farmer in Guodu Town, Xi'an City.

[0033] Include the following steps:

[0034] Step 1. Take 10L of groundwater to be treated and add it to the closed reactor. In the morning, middle and evening, nitrogen gas is introduced into the reactor 3 times, each time for 5 minutes. At the beginning of acclimatization, nutrient solution I was used as the acclimatization medium.

[0035] During the domestication process, the concentration of nutrient solution I was gradually reduced until the concentration of nutrient solution was 0.1g / L sodium bicarbonate, 0.02g / L NaNO 3 , 0.02g / L KH 2 PO 4, 0.02g / L MgSO 4 ·7H 2 O, 0.02g / L CaCl 2 , 0.4ml trace element solution, using the above method to domesticate for 30 days to complete sludge enrichment to obtain sedimentation sludge.

[0036] The formula ...

Embodiment 2

[0047] This embodiment provides a method for synchronously removing manganese and nitrate from groundwater. The groundwater to be treated in Embodiment 2 comes from a certain groundwater well in Qianyang County, Shaanxi Province, including the following steps:

[0048] Step 1, get 5L groundwater to be treated and add in the airtight reactor, other is with embodiment 1;

[0049] Step 2, with embodiment 1;

[0050] Step 3: Take bulk sludge and add nutrient solution III to make enriched and domesticated bacterial solution, use ceramsite with a particle size of 5mm as the filter material, add 2L of enriched and domesticated bacterial solution and an equal proportion of nutrient solution per kilogram of ceramsite Ⅲ. The reactor was sealed, and the film was hung at 25°C for 9 days, and the nitrogen was used every 8 hours. 2 Carry out aeration and stirring once, every 30 minutes. The light yellow biofilm formed on the surface of the ceramsite indicates that the hanging film is ove...

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Abstract

The invention discloses a method for synchronously removing manganese and nitrate in groundwater, which comprises the following steps: step 1, under closed anaerobic conditions, adding nutrient solution I to the groundwater to be treated for cultivation and collecting sedimentation sludge; After adding nutrient solution II to the sludge for cultivation, discard the supernatant, and carry out further cultivation of the obtained sediment; step 3, use the bulk sludge obtained in step 2 to carry out filter material hanging film to obtain biological filler, and use the groundwater to be treated Simultaneous removal of manganese and nitrate by biomedia. The biological method of the present invention for treating groundwater subverts the previous technicians to remove nitrate and manganese ions separately through two reaction devices, and the present invention can realize the synchronous removal of nitrate and manganese ions in groundwater, greatly reducing infrastructure and operating costs.

Description

technical field [0001] The invention belongs to the technical field of groundwater treatment, in particular to a method for removing manganese and nitrate pollutants in groundwater. Background technique [0002] The increasingly serious problem of groundwater pollution has attracted the attention of many countries around the world. In China, the common pollutants in groundwater are nitrate, iron and manganese ions, etc. In northern areas, especially in rural areas, nitrate pollution is more serious. [0003] Excessive intake of nitrates can lead to various chronic diseases or cancer. Nitrate can be converted into nitrite through the human digestive system. Nitrate nitrogen that enters the human body through diet can be reduced in the gastrointestinal tract to form nitrite nitrogen, which can quickly enter the blood to form methemoglobin that cannot carry oxygen, resulting in hypoxia and methemoglobinemia. Excessive manganese ions in water will affect the sensory propertie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F103/06C02F101/16C02F101/20
CPCC02F3/28C02F2101/163C02F2101/206C02F2103/06C02F2305/06
Inventor 苏俊峰高一畴黄廷林高椿寓郭东鑫
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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