Treatment method for enhancing degradation of methyl orange by anaerobic organisms

An anaerobic biology and treatment method technology, which is applied in the field of strengthening the treatment of anaerobic biodegradation of methyl orange, can solve problems such as lack, and achieve the effects of reducing treatment costs, improving degradation and decolorization efficiency, and reducing costs.

Inactive Publication Date: 2019-08-30
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the study of extracellular electron transfer mediated by conductive iron oxide materials in anaerobic biological reduction of azo dye systems is still lacking.

Method used

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  • Treatment method for enhancing degradation of methyl orange by anaerobic organisms
  • Treatment method for enhancing degradation of methyl orange by anaerobic organisms
  • Treatment method for enhancing degradation of methyl orange by anaerobic organisms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 80mL of wastewater containing methyl orange with a concentration of 50mg / L into a 100mL anaerobic bottle, fill it with high-purity nitrogen to exhaust the residual oxygen in the wastewater to an anaerobic state, and add 20mL of domesticated anaerobic sludge (sludge Mud MLSS is 15.6g / L), COD concentration is 9.78mg / L sodium acetate and 0.5g / L nano Fe 3 o 4 , sealed anaerobic bottle, and constructed an iron oxide coupled anaerobic biological system. According to the same steps above, only the same amount of anaerobic sludge and only nano-Fe 3 o 4 The anaerobic biological control system and the iron oxide control system. The specific composition of each system is shown in Table 1.

[0029]

[0030]

[0031] The above three systems were placed in a constant temperature oscillator for full reaction, the control speed was 200r / min, and the temperature was 35°C. During the reaction period, at the set sampling time point, the water sample was filtered with a 0.22...

Embodiment 2

[0035] Add 80mL of wastewater containing methyl orange with a concentration of 50mg / L into a 100mL anaerobic bottle, fill it with high-purity nitrogen to exhaust the residual oxygen in the wastewater to an anaerobic state, and add 20mL of domesticated anaerobic sludge (sludge Mud MLSS is 15.6g / L), COD concentration is 9.78mg / L sodium acetate and 0.5g / L nano Fe 3 o 4 , sealed anaerobic bottle, and constructed an iron oxide coupled anaerobic biological system. Following the same steps above, add 1g / L, 1.5g / L and 5g / L nano-Fe to the anaerobic sludge respectively. 3 o 4 , to build a coupling system with different dosages. The specific composition of each system is shown in Table 2.

[0036]

[0037]

[0038] The above four systems were placed in a constant temperature oscillator for full reaction, the control speed was 200r / min, and the temperature was 35°C. During the reaction period, at the set sampling time point, the water sample was filtered with a 0.22 μm filter m...

Embodiment 3

[0041] to nano-Fe 3 o 4 The coupling system with a dosage of 1g / L, under the action of an external magnetic field, conducts nano-Fe 3 o 4 separation and extraction. For the obtained nano-Fe 3 o 4 After cleaning its surface with 2% NaOH solution, the obtained nano-Fe 3 o 4 Join the coupling system again to explore nano-Fe 3 o 4 Recyclability and reuse of methyl orange degradation in a coupled system.

[0042] The result is as image 3 As shown, with the nano-Fe 3 o 4 With the increase of the number of cycles, the degradation effect of the coupling system on methyl orange is relatively stable. When the number of cycles reached 15, the removal rate of methyl orange by the coupling system was 95.57%. When the number of cycles was further increased to 25, the removal rate of methyl orange by the coupled system was only slightly decreased to 94.71%. The above results show that the added nano-Fe 3 o 4 It is relatively stable in the coupling system and can be reused ma...

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Abstract

The invention discloses a treatment method for enhancing degradation of methyl orange by anaerobic organisms. The method comprises steps as follows: simulated wastewater with methyl orange concentration of 10-50 mg/L is added to anaerobic sludge, and sludge acclimatization is completed; ferric oxide is added to the acclimatized anaerobic sludge, and a ferric oxide coupled anaerobic organism systemis constructed; a carbon source and methyl orange wastewater are added to the ferric oxide coupled anaerobic organism system; the methyl orange wastewater is subjected to sufficient mixing reaction in the ferric oxide coupled anaerobic organism system. According to the method, the methyl orange degradation efficiency of anaerobic organisms can be improved by adding a small amount of nano Fe3O4, and the removal rate of azo dyes in the wastewater under the optimal condition can reach 95% or higher. Besides, the quantity of the carbon source required in a reducing process is substantially reduced and is only 2 times the theoretical reducing amount of methyl orange. Nano Fe3O4 can be recovered under the action of an external magnetic field and can be repeatedly used, and therefore, the treatment cost of the wastewater is further reduced.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a treatment method for strengthening anaerobic biodegradation of methyl orange. Background technique [0002] Due to its stable dyeing and low price, methyl orange has become the largest component of synthetic dyes in the textile printing and dyeing industry, and is widely used in food, paper and leather industries. With the continuous improvement of the scale and level of my country's textile printing and dyeing industry, the demand for methyl orange has shown a significant upward trend, and the types and quantities of methyl orange discharged into the environment through production wastewater and other channels are also increasing, and the environmental problems caused by it are becoming more and more serious. Under the action of chromogenic groups, methyl orange easily absorbs visible light, thereby reducing the transparency of water bodies and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/30C02F101/34C02F101/38C02F103/30
CPCC02F3/2806C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2103/30
Inventor 欧昌进秦娟张峻通钱卢雯郑怡青黄陈辉王中一
Owner NANTONG UNIVERSITY
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