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Method for treating copper-containing wastewater by forming granular sludge through microorganism sediment

A technology of granular sludge and microbial flocculation, used in biological water/sewage treatment, biological treatment devices, water/sludge/sewage treatment, etc. problems, to achieve the effect of clean and sustainable production process, low production cost and reduced disposal cost

Active Publication Date: 2016-06-22
湖南益石科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these flocculants are usually expensive, and polyacrylamide has certain toxicity. Due to the low molecular weight of polysaccharides and amino acids, the sedimentation performance of the formed granular sludge is not very ideal.

Method used

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  • Method for treating copper-containing wastewater by forming granular sludge through microorganism sediment
  • Method for treating copper-containing wastewater by forming granular sludge through microorganism sediment
  • Method for treating copper-containing wastewater by forming granular sludge through microorganism sediment

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Inoculate Aspergillus (CGMCC No.5858) onto potato solid medium at 37°C, and cultivate for 7 days to activate. The activated Aspergillus was inoculated into 100mL liquid potato medium, and cultured at 30°C for 3 days. After 3 days of growth, Aspergillus formed loose mycelium balls. Use 1500rpm magnetic stirring to disperse large mycelium balls to obtain loose mycelium. Take 5 mL of the dispersed bacterial liquid and re-inoculate it into 100 mL of liquid potato medium, and incubate at 30°C for 48 hours to form a large number of small mycelial balls with a diameter of about 2 mm. Adjust the pH value of the living filamentous fungus to 11.0±0.2. The living filamentous fungus is stored in a Erlenmeyer flask for future use.

[0033] A reaction beaker was placed on a constant temperature magnetic stirrer, and 100 mL of a suspension containing CuO seed crystals (solid concentration: 2.5 g / L) was added thereto. The reaction temperature was controlled at 25° C., and the rotati...

Embodiment 2

[0036]Inoculate Aspergillus (CGMCC No.5858) onto potato solid medium at 37°C, and cultivate for 7 days to activate. The activated Aspergillus was inoculated into 100mL liquid potato medium, and cultured at 30°C for 3 days. After 3 days of growth, Aspergillus formed loose mycelium balls. Use 1500rpm magnetic stirring to disperse large mycelium balls to obtain loose mycelium. Take 5 mL of the dispersed bacterial liquid and re-inoculate it into 100 mL of liquid potato medium, and culture it at 30°C for 48 hours to form a large number of small mycelial balls with a diameter of about 2 mm. Glutaraldehyde solution was added for inactivation. The concentration of glutaraldehyde after addition was 2.5%. It was left standing at room temperature for 6 hours, and its pH value was adjusted to 11.0±0.2. The inactivated mycelium was placed in a glass bottle for later use.

[0037] A reaction beaker was placed on a constant temperature magnetic stirrer, and 100 mL of a suspension containin...

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Abstract

The invention belongs to the technical field of environment protection and in particular relates to a method for treating copper-containing wastewater by forming granular sludge through microorganism sediment. In a copper-containing wastewater chemical sediment treatment process, efficient aggregation of the sediment is the key for determining whether rapidly settled granular sludge can be formed or not. Therefore, a branched net-shaped structure and microorganism-based filamentous fungi with a stronger non-covalent-bond mutual effect between micro-nano particles are applied to a formation process of the chemical sediment granular sludge; the filamentous fungi are low in cost, wide in source and stable in characters, and are convenient for large-scale application. The sedimentation rates of the chemical sediment granular sludge, obtained by a living filamentous fungus method and a dead filamentous fungus method, reach 2.4cm / s and 2.5cm / s respectively, and are much higher than that of flocculent sludge. Therefore, the method is a cheap, safe and efficient formation method for accelerating the chemical sediment granular sludge.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating copper-containing wastewater by using microbial flocculation to form granular sludge. Background technique [0002] In the process of copper-containing wastewater treatment, the sedimentation and separation performance of the sludge is a very important indicator. If the sedimentation and separation effect of the generated sludge is poor, it is easy to cause the sludge to dissolve in the subsequent sedimentation and transportation process, and the copper in the sludge It will return to the supernatant, making the effluent water quality worse. In the process of chemical precipitation to treat copper-containing wastewater, the sludge formed is generally flocculent, and its sedimentation rate is often less than 1cm / s, which makes it difficult to achieve the purpose of efficient solid-liquid separation. In order to solve this problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/20
CPCC02F3/347C02F2101/20C02F2203/004C02F2305/06
Inventor 柴立元李青竹叶丽君颜旭王庆伟闵小波杨志辉廖骐
Owner 湖南益石科技有限公司
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