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A method for treating antibiotic wastewater based on a co-metabolism-based photocatalytic-biological direct coupling system

A technology of antibiotic wastewater and photocatalysis, applied in the direction of sustainable biological treatment, biological water/sewage treatment, natural water treatment, etc., can solve the problems of antibiotic sterilization and complex structure, avoid excessive photocatalytic oxidation, save time and Effect of improvement of space and removal efficiency

Active Publication Date: 2019-10-08
NORTHEAST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the bactericidal properties and structural complexity of antibiotics, how to maintain the biological activity of the biofilm in the direct coupling system is a difficulty in maintaining the stability of the system and improving the degradation efficiency of antibiotics.

Method used

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  • A method for treating antibiotic wastewater based on a co-metabolism-based photocatalytic-biological direct coupling system
  • A method for treating antibiotic wastewater based on a co-metabolism-based photocatalytic-biological direct coupling system

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Effect test

Embodiment 1

[0026] Embodiment 1 The construction of photocatalysis-biological direct coupling system

[0027] 1Ag / TiO 2 load

[0028] Ag-doped TiO with visible light responsiveness prepared by sol-gel method 2 (Ag / TiO 2 ). Isopropyl titanate and silver nitrate (AgNO 3 ) as Ti precursor and Ag source, respectively. use sodium citrate Ag as a reducing agent + reduction.

[0029] The specific production process is as follows: first, 2 mmol of AgNO 3 Mix it with 500mL of sodium citrate solution (4mol / L) in a closed headspace bottle and place it in a digital constant temperature water bath to stir, and gradually raise the temperature to 80°C under continuous stirring. Ag is indicated when the color of the mixture changes from colorless to brown-black + was reduced; add 1mol isopropyl titanate and 0.15mol HNO dropwise to the headspace bottle under constant temperature and airtight condition 3 The mixed solution should be continuously stirred during the dropwise addition; after the d...

Embodiment 2

[0036] Example 2 Based on co-metabolism means to strengthen the direct coupling system to degrade antibiotic wastewater

[0037] Mix easily biodegradable organic wastewater (such as pharmaceutical factory domestic sewage, adjacent food processing wastewater, etc.) with antibiotic wastewater to achieve co-metabolism of easily biodegradable organic matter and antibiotics. The ratio of the chemical oxygen demand (COD) of the easily biodegradable organic wastewater to the COD of the antibiotic wastewater is ≥1. Antibiotic wastewater treatment is carried out in the coupling reactor of the photocatalysis-biological direct coupling material system set in the above-mentioned embodiment 1, and the illumination intensity of visible light / sunlight is ≥20mW / cm 2 , Inner cylindrical aeration (superficial velocity of 10.6mm / s).

[0038] Compared with organic wastewater without co-metabolism (i.e., easily biodegradable organic wastewater), the proportion of live bacteria in the biofilm in t...

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Abstract

The invention relates to a method for treating antibiotics waste water based on a cometabolism photocatalysis-biological direct coupling system. The photocatalytic-biological direct coupling system comprises an internal circulation sequencing batch reaction apparatus and a porous sponge carrier loading a catalyst and a biological membrane. The invention also provides a method for treating antibiotics waste water by virtue of a cometabolism reinforcing photocatalytic-biological direct coupling system. The method comprises the following steps: arranging the photocatalytic-biological direct coupling system; mixing biodegradable organic waste water in the antibiotics waste water, and directly treating the antibiotics waste water in the photocatalytic-biological direct coupling system. By adopting the apparatus and method, the excessive catalytic oxidation is avoided, and the needed time and space are saved; and by adopting the cometabolism strategy, the mineralization function of microorganisms in the direct coupling system can be further improved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method for treating antibiotic wastewater by a co-metabolism-based photocatalysis-biological direct coupling system. Background technique [0002] There are certain limitations in the traditional process for the treatment of antibiotic wastewater. Antibiotics are bactericidal, and traditional biological methods are helpless in the treatment of antibiotic wastewater; advanced oxidation methods have problems such as high cost and complex regulation, and it is difficult to mineralize some antibiotics with complex structures. The advanced oxidation process commonly used at present improves the biodegradability of wastewater, and then uses biological methods to further degrade the intermediate products (indirect coupling). However, the advanced oxidation reaction in the indirect coupling method is very fast, and it is very difficult to control the intermediate product to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725C02F3/1263C02F2101/30C02F2103/343Y02W10/10
Inventor 周丹丹熊厚峰崔晓春马跃
Owner NORTHEAST NORMAL UNIVERSITY
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