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Biochar-based adsorbents for the removal of organic pollutants in sewage

A technology of organic pollutants and biochar, applied in water pollutants, water/sewage treatment, adsorbed water/sewage treatment, etc., to prevent adhesion

Active Publication Date: 2021-08-10
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, which is composed of large-particle biochar, medium-particle biochar and small-particle biochar. The particle size of the biochar is less than or equal to 60 mesh, and the particle size of the medium particle biochar is less than or equal to 20 mesh and greater than 60 mesh; the sewage containing organic pollution flows through the large particle biochar, medium particle biochar and small particle biochar in sequence. The biochar-based adsorbent of the invention is beneficial to reduce the cost of sewage treatment and the difficulty of process operation, and improve the stability of effluent water quality.

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 Patents(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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