Method for extracting humic acid substances from methane fluid

A humic and acid technology, used in organic chemistry and other directions, can solve the problems of low recovery rate and low purity, and achieve the effect of improving purity, improving purity and concentration, and improving the level of resource utilization.

Active Publication Date: 2011-08-10
TSINGHUA UNIV
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Problems solved by technology

[0007] Aiming at the problems of low recovery rate and low purity in the separation and purification of humic acid substances from biogas slurry, the present invention provides a method for extracting humic acid substances from biogas slurry

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  • Method for extracting humic acid substances from methane fluid
  • Method for extracting humic acid substances from methane fluid

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Embodiment 1

[0030] Landfill leachate is a typical biogas slurry. Taking a domestic waste landfill as an example, the amount of leachate produced is 100m 3 / d, after being treated by a membrane bioreactor (MBR), the effluent COD concentration is 1700mg / L, and the concentration of humic acid substances is 1000mg / L (HS content is 59%). In this embodiment, humic acid substances are separated and extracted from the above-mentioned treated water.

[0031] The 717 resin was selected, and the three-stage series method was used for adsorption. The total amount of resin required is 6t, the cross section of the resin column is Φ1.6m, and the height is 1.6m. Filter the biogas slurry through sand filtration to remove suspended matter, and the pretreated biogas slurry enters the 717 resin column. The apparent hydraulic retention time of the leachate is 2 hours, and then the desorption liquid prepared by the desorption agent (the desorption solution used here is The medicament consists of NaCl, NaOH ...

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Abstract

The invention discloses a method for extracting humic acid substances from methane fluid and belongs to the technical field of separation and purification of humic acid substances from methane fluid. In the method, by combining ion exchange resin and an ultrafiltration membrane, the humic acid substances are extracted from the methane fluid; through adsorption of resin, the humic acid substances are effectively separated from other impurities, and the purity of the humic acid substances in the products is improved; and the desorbed resin can be recovered to the initial state and recycled. Mixed solution of the humic acid substances and a desorption medicine, which is desorbed from the resin is separated through the ultrafiltration membrane, so that the purity and concentration of the humic acid substances can be further improved, the recycling level of the humic acid substances is improved, and the desorption medicine can be separated and recycled so as to reduce operating cost. The method solves the treatment problem that organic matters in the methane fluid are difficult to degrade, the humic acid substances are recycled, and the purity, concentration and recovery rate of the humic acid substances are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of separation and purification of biogas slurry humic acid substances, in particular to a method for extracting humic acid substances from biogas slurry. Background technique [0002] Biogas slurry is a high-concentration organic wastewater produced during anaerobic digestion of organic waste. Livestock manure, kitchen waste, wastewater from anaerobic digestion of sewage plant sludge, and leachate from domestic waste landfills all belong to biogas slurry. Biogas slurry generally has the characteristics of many types of organic pollutants, high concentration, many types of inorganic ions, imbalanced ratio of nutrient elements, poor biodegradability, and difficult treatment. Biogas slurry COD is generally about 20,000-50,000mg / L or more, and it is difficult to meet the discharge standard after biological treatment, and the biogas slurry after biological treatment is even more difficult to treat. Studies have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07G99/00C08H99/00
Inventor 岳东北聂永丰程熠晴宋建刚
Owner TSINGHUA UNIV
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