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Method for treating landfill leachate with composite photocatalytic biosorbent

A biosorbent and landfill leachate technology, applied in biological water/sewage treatment, chemical instruments and methods, energy wastewater treatment, etc., can solve problems such as high content of refractory biodegradable substances, large changes in water quality and quantity, and high ammonia nitrogen concentration , to achieve the effects of improving processing efficiency, improving mechanical properties, and improving photocatalytic performance

Inactive Publication Date: 2017-03-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Landfill leachate has the characteristics of high COD and ammonia nitrogen concentration, large chroma, high content of refractory biodegradable substances, toxicity, and large changes in water quality and quantity. It is currently an internationally recognized technical problem in sewage treatment.

Method used

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  • Method for treating landfill leachate with composite photocatalytic biosorbent
  • Method for treating landfill leachate with composite photocatalytic biosorbent
  • Method for treating landfill leachate with composite photocatalytic biosorbent

Examples

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Effect test

Embodiment 1

[0038] A composite photocatalytic biosorbent of the present invention, the composite photocatalytic biosorbent is based on white rot fungus living mycelia as a carrier, the mycelium is wound into a ball, and the inside of the ball is embedded with nitrogen-modified TiO 2 Nanoparticles and calcium alginate, calcium alginate as the immobilization medium to mycelium and nitrogen modified TiO 2 The nanoparticles are tightly connected together, and the nitrogen-modified TiO embedded in the bacteria ball 2 The mass ratio of nanoparticles to calcium alginate was 1:4 (nitrogen-modified TiO 2 It can be implemented when the mass ratio of nanoparticles and calcium alginate is 1:3-5).

[0039] A preparation method of the above-mentioned composite photocatalytic biosorbent of the present embodiment, comprising the following steps:

[0040] (1) Preparation of nitrogen-modified TiO by sol-gel method 2 Nanoparticles: First weigh 0.282g of urea into a 250mL Erlenmeyer flask, add 40mL of abs...

Embodiment 2

[0050] A method for treating landfill leachate by a composite photocatalytic biosorbent, the composite photocatalytic biosorbent is derived from Example 1, comprising the following steps:

[0051] (1) Prepare landfill leachate with COD concentrations of 100mg / L, 200mg / L, 400mg / L, and 600mg / L, adjust the pH value to 6.0, and fill the landfill leachate with the above concentrations in 250mL conical flasks 100mL, sterilized at 105°C for 30min.

[0052] (2) In the sterile landfill leachate, add the composite photocatalytic biosorbent after immobilized culture in Example 1, and the addition amount is to add the composite photocatalytic biosorbent with wet weight in every 100mL sterile landfill leachate. Biosorbent 4.0g (the addition amount of composite photocatalytic biosorbent is 20g / L~80g / L, can be implemented), at 37°C, rotation speed 150rpm, 20W incandescent lighting conditions, vibration adsorption and degradation for 96h (oscillation adsorption The rotation speed is 150rpm-1...

Embodiment 3

[0063] In this embodiment, the composite photocatalytic biosorbent is used for treating landfill leachate with different initial pH values. The composite photocatalytic biosorbent is derived from Example 1 and includes the following steps:

[0064] (1) Prepare landfill leachate with a COD concentration of 200mg / L, adjust the pH values ​​to 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5 in a 250mL Erlenmeyer flask Fill them with 100mL of landfill leachate with the above pH values, and sterilize at 105°C for 30min.

[0065] (2) In the above-mentioned sterilized landfill leachate, add the composite photocatalytic biosorbent after immobilized culture in Example 1, and the addition amount is to add the compound type of wet weight in every 100mL sterile landfill leachate Photocatalytic biosorbent 4.0g, oscillating adsorption and degradation at 37°C, 150rpm, 20W incandescent light for 96 hours, separated the liquid phase and solid phase after standing, adjusted the liquid...

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Abstract

The invention discloses a method for treating landfill leachate with a composite photocatalysis bio-adsorbent. The method comprises the following steps: adding the omposite photocatalysis bio-adsorbent into the landfill leachate at a dosage of 20g / L-80g / L by wet weight, performing light vibration and adsorption degradation, separating solid and liquid after reaction is completed, and adjusting pH of the filtrate to neutral to accomplish the treatment of the landfill leachate. The method for treating the landfill leachate with the composite photocatalysis bio-adsorbent has the advantages of simple treatment process and adsorption equipment, convenient operation, very low cost, high adsorption volume, high adsorption efficiency, no pollution, very good treatment effect of the landfill leachate. By virtue of the method, the operation cost of the treatment of the landfill leachate can be effectively reduced, and the landfill leachate can be effectively treated. The method can be widely adopted.

Description

technical field [0001] The invention belongs to the field of biological adsorption treatment of waste water, and relates to a method for treating landfill leachate, in particular to a method for treating landfill leachate by using a composite photocatalytic biosorbent. Background technique [0002] The research on landfill leachate in my country began in the early 1990s, but until now there is still a lack of systematic and in-depth research on the water quality of landfill leachate, its changing law, and leachate treatment technology. Landfill leachate has the characteristics of high concentration of COD and ammonia nitrogen, large chroma, high content of refractory biodegradable substances, toxicity, and large changes in water quality and quantity. It is currently an internationally recognized technical problem in sewage treatment. Therefore, it is imperative to strengthen the research work in this area and study the treatment technology suitable for the water quality char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
CPCY02W10/37
Inventor 胡亮何益斌曾光明陈桂秋陈安伟郭志武海鹏万佳于志刚
Owner HUNAN UNIV
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