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Biochar-based adsorbent for removing organic pollutants in sewage

A technology of organic pollutants and biochar, applied in the direction of water pollutants, water/sewage treatment, adsorption water/sewage treatment, etc.

Active Publication Date: 2020-09-29
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is to reduce the cost of sewage treatment and the difficulty of process operation, and improve the stability of effluent water quality for the biochar-based adsorbent used to remove organic pollutants in sewage

Method used

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Embodiment Construction

[0023] The biochar-based adsorbent used to remove organic pollutants in sewage is composed of large-particle biochar, medium-particle biochar and small-particle biochar. The particle size of large-particle biochar is greater than 20 mesh, and the particle size of small-particle biochar is Less than or equal to 60 mesh, the particle size of medium particle biochar is less than or equal to 20 mesh and larger than 60 mesh; sewage containing organic pollution flows through large particle biochar, medium particle biochar and small particle biochar in sequence.

[0024] In this embodiment, the steps of preparing large-particle biochar from rice husks and preparing small-particle biochar from rice straw are as follows:

[0025] (A1) The rice straw was dried in the sun, crushed, and passed through a 60-mesh sieve to obtain the rice straw powder, which was then soaked in a white rot fungus degradation solution for degradation. 3 There are 3 billion white rot bacteria in the white rot f...

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Abstract

The invention discloses a biochar-based adsorbent for removing organic pollutants in sewage. The biochar-based adsorbent is composed of large-particle biochar, medium-particle biochar and small-particle biochar, the particle size of the large-particle biochar is larger than 20 meshes, the particle size of the small-particle biochar is smaller than or equal to 60 meshes, and the particle size of the medium-particle biochar is smaller than or equal to 20 meshes and larger than 60 meshes. Sewage containing organic matter pollution sequentially flows through the large-particle biochar, the medium-particle biochar and the small-particle biochar. The biochar-based adsorbent is beneficial to reducing the sewage treatment cost and the process operation difficulty and improving the effluent qualitystability.

Description

technical field [0001] The invention relates to the technical field of sewage treatment. Specifically, biochar-based sorbents for the removal of organic pollutants in sewage. Background technique [0002] In the prior art, biochar is used to remove organic pollutants in sewage. In order to improve the adsorption efficiency, biochar with a smaller particle size is usually used. However, since the sewage entering the biochar adsorption unit carries suspended solids, a large amount of suspended solids will be intercepted on the water inlet surface of the biochar adsorption unit and the surface layer at a certain distance from the water inlet surface, which will make the upper and lower layers of the biochar adsorption unit The service life of biochar is different. In order to reduce the replacement cycle of biochar, the biochar adsorption unit is usually backwashed when the suspended solids in the upper layer of the biochar adsorption unit accumulate to a certain extent, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/28016B01J2220/4825C02F1/283C02F2101/30
Inventor 王宗爽谭玉菲徐舒郭敏赵国华顾闫悦
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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