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Carbon source carrier filler for repairing nitrate pollution of underground water

A pollution remediation and nitrate technology, applied in water pollutants, water/sludge/sewage treatment, chemical instruments and methods, etc. Anaerobic microorganisms and other problems, to achieve good microbial carrier performance, conducive to attachment growth, and improve the effect of denitrification efficiency

Inactive Publication Date: 2012-09-26
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many technologies, these methods have their own limitations in practical application: physical and chemical treatment cannot convert nitrate into harmless substances, there is secondary pollution, and the efficiency is low, the selectivity is poor, the investment is high, and the operating cost is high. Suitable for large-area groundwater nitrate pollution remediation
[0004] From the two aspects of completely eliminating nitrate pollution in groundwater and reducing the cost of denitrification, biological denitrification method is the most economical and effective method that has been put into use at present. carbon source, and the dissolved oxygen contained in the water makes it difficult for the groundwater environment to reach anaerobic conditions; if an external carbon source is added, the effluent often contains biological solids and dissolved organic matter

Method used

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  • Carbon source carrier filler for repairing nitrate pollution of underground water
  • Carbon source carrier filler for repairing nitrate pollution of underground water
  • Carbon source carrier filler for repairing nitrate pollution of underground water

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Embodiment Construction

[0015] In order to better understand the present invention, the present invention will be further described below in conjunction with the examples, but the protection scope of the present invention is not limited to the scope described in the examples.

[0016] Coating composition:

[0017] Hemp fiber powder: 55%; animal hide glue: 20%; water: 15%; trace element mixture: 3%; sodium erythorbate: 3%; oxygen scavenger: 2%; pH regulator: 2%.

[0018] Production Process:

[0019] The prepared coating material solution is sent to the solution tank, and then pumped to the high-level tank, and the solution flows out from the high-level tank by the high-level difference, and is distributed to each injector. The compressed air of 0.3~0.5MPa is sent into the ejector from the outer pipe, and sprayed through the nozzle to produce suction, and the coating material solution is sucked into the ejector, and after the gas-liquid combination, it is sprayed into the prilling tower in the form of...

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Abstract

The invention provides a carbon source carrier filler for repairing nitrate pollution of underground water. The carbon source carrier filler is formed by cladding biological ceramsite surface with an organic carbon source coating. The coating of the carbon source carrier filler comprises the following main components of: by weight, 10-50% of a natural carbon source material powder, 10-20% of a solvent, 1-5% of trace element, 10% of animal glue, 0-5% of a deoxidant, 0-5% of a pH conditioning agent and 0-2% of a surfactant. The carbon source carrier filler prepared in the invention has good mechanical properties and biological endophilicity, can achieve the aim of long-acting sustained release of carbon source, is suitable for underground water in-situ and ex-situ remediation technologies, and can be used to effectively avoid the secondary pollution problem of additional carbon sources.

Description

technical field [0001] The invention relates to a carbon source carrier filler for nitrate pollution restoration of groundwater, belonging to the technical field of groundwater pollution restoration. Background technique [0002] 68% of the fresh water sources suitable for drinking on the earth are groundwater, and about 50% of the world's population uses groundwater as their drinking water source. However, whether in industrially developed countries or developing countries, due to the discharge and leakage of domestic sewage and industrial wastewater, the application of a large number of chemical fertilizers and pesticides in rural areas, the leaching and infiltration of fecal garbage and solid waste, atmospheric nitrogen oxides Wet and dry deposition, as well as unreasonable recharge of sewage, etc., lead to an upward trend in the concentration of nitrate nitrogen in groundwater, and become an important environmental problem. [0003] Previously, the remediation methods f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/16
Inventor 李頔王鹤立姜廷亮
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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