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Modification method of granular carbon material for anaerobic digestion of low-concentration wastewater

An anaerobic digestion and granular carbon technology, applied in anaerobic digestion treatment, chemical instruments and methods, granular microbial carrier treatment, etc., can solve the problems of reduced specific surface area, complicated preparation methods, etc. Ease of implementation and effect with few influencing factors

Inactive Publication Date: 2019-08-30
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex preparation methods and reduced specific surface area in the existing modified activated carbon loaded with ferroferric oxide particles, and to provide a modified granular carbon material for anaerobic digestion of low-concentration wastewater. method

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  • Modification method of granular carbon material for anaerobic digestion of low-concentration wastewater

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specific Embodiment approach 1

[0018] Specific Embodiment 1: This embodiment is a method for modifying granular carbon materials used for anaerobic digestion of low-concentration wastewater. Specifically, it is completed in the following steps: dissolve iron salt and ferrous salt in a solvent, and first add For the granular carbon material, add an oxidizing agent after stirring and mixing, carry out co-precipitation reaction, wash the solid matter obtained by the co-precipitation, obtain the solid matter after washing, and dry the solid matter after washing to obtain the modified granular carbon material;

[0019] The molar ratio of the iron salt to the ferrous salt is 6:(1~6), the volume ratio of the amount of the substance of the iron salt to the solvent is 1mol:96mL~6153mL; the molar ratio of the iron salt to the granular carbon material The ratio is 1:(5-15), the molar ratio of the iron salt to the oxidant is 1:(5-40); the particle size of the granular carbon material is 10-30 mesh.

specific Embodiment approach 2

[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the iron salt is ferric chloride or ferric nitrate. Others are the same as the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the ferrous salt is ferrous chloride, ferrous nitrate or ferrous sulfate. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a modification method of a granular carbon material for anaerobic digestion of low-concentration wastewater, and relates to the modification method of the granular carbon material. The invention aims to solve the problems that existing modified activated carbon loaded with ferroferric oxide particles is complex in preparation method and the specific surface area is reduced.The modification method comprises a step of preparing the modified granular carbon material by using an iron material as a dopant of a modified granular carbon material by adopting a coprecipitationmethod. The method has the advantages that the method is simple and feasible, the production process is short, total time consumption is less, influence factors are few, consumed raw materials are few, high-temperature heating is not needed, cost is low, and economical efficiency is achieved. In addition, the specific surface area, conductivity, hydrophilicity and electron exchange capacity of thegranular carbon material are increased. The modification method is mainly used for preparing modified granular carbon materials.

Description

technical field [0001] The invention relates to a method for modifying granular carbon materials. Background technique [0002] my country is one of the countries with water shortages, and the per capita water resources are only a quarter of the world average. At the same time, the problem of water pollution is becoming more and more serious. The total amount of sewage discharge in the country is increasing year by year, among which low-concentration organic wastewater—urban sewage accounts for more than 50%. The discharge of urban sewage is huge and contains a large amount of biodegradable organic carbon sources. Recycling it can not only recover a large amount of energy, alleviate the current energy crisis, but also eliminate its pollution to the water environment. Anaerobic digestion technology is a resource technology that can oxidize and degrade organic matter in wastewater, and recover the energy contained in it in the form of methane, etc. It is an effective way to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/30
CPCC02F3/2806C02F2003/001C02F2003/003C02F2101/30
Inventor 冯玉杰宋向茹刘佳蒋晴
Owner HARBIN INST OF TECH
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