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Method and device for improving wastewater treatment biological film forming efficiency

A wastewater treatment and biofilm technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of limited applicability, high cost, and low efficiency of film formation. Achieve the effects of reducing time and difficulty of operation, low cost, and high efficiency of film hanging

Active Publication Date: 2017-03-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low film-hanging efficiency, high cost, and limited applicability in the prior art, the present invention provides a device and method for improving the efficiency of biofilm-hanging in wastewater treatment

Method used

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  • Method and device for improving wastewater treatment biological film forming efficiency
  • Method and device for improving wastewater treatment biological film forming efficiency
  • Method and device for improving wastewater treatment biological film forming efficiency

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0049] Since my country needs to upgrade the water quality of water plants, a large number of water plants are facing the problem of upgrading and transformation. The biofilm method provides new ideas for the upgrading and transformation of water plants, but in some water bodies it is difficult to form biofilm on the surface of the filler, and it is necessary to develop methods and devices to promote film formation for special water bodies.

[0050] Such as figure 1 As shown, a device for improving the efficiency of biofilm formation in wastewater treatment includes a magnetic stirrer 1, and a three-mouth flask 2 is arranged on the magnetic stirrer 1. One mouth of the three-mouth flask 2 is a bacterial liquid feeding port b, and the other mouth is a bacterial liquid feeding port b. The liquid return port a, one port is the bacterial liquid supply port c, the bacterial liquid feeding port b passes through the first peristaltic pump 3 pipeline and the bacterial liquid is added t...

Embodiment 2

[0053] A method for improving the efficiency of biofilm formation in wastewater treatment, comprising the following steps:

[0054] (1) Sampling the membrane-hanging mud-water mixture, centrifuging and dehydrating in a high-speed rotary centrifuge, removing the supernatant, and taking mud samples; the speed of the high-speed centrifuge is 12000×g~14000×g; the centrifugation time is 10~20min;

[0055] (2) Add ethyl acetate to the mud sample to extract homoserine lipids; (C4-C14-HSL) the extraction method is ultrasonic extraction, the extraction conditions are: ultrasonic power 150-200w, extraction time 60-90min, extraction The temperature is 25-30°C, the volume of the extraction solution is 10-30mL, and the extraction is 3-5 times;

[0056] (3) Sampling high-performance liquid chromatography-mass spectrometry to detect the content of homoserine lactones; liquid phase-mass spectrometry equipment, select triple quadrupole equipment, and the measurement conditions are: chromatogra...

Embodiment 3

[0072] The effluent quality of an industrial wastewater cannot meet the requirements of Class I (A), and the biofilm method is proposed to upgrade the original aerobic pool.

[0073] The specific implementation process of this example is:

[0074] 1. Sampling the membrane-hanging mud-water mixture in a high-speed rotary centrifuge at 12000×g; the centrifugation time is 10 minutes, discard the supernatant, and take mud samples;

[0075] 2. Add ethyl acetate to extract homoserine lipids, here is C4-HCL, ultrasonic power 150w, extraction time 60min, extraction temperature 30°C;

[0076] 3. The content of homoserine lactones was detected by sampling high-performance liquid chromatography-mass spectrometry; the determination conditions were: chromatographic conditions: flow rate: 0.2mL / min; injection volume: 10μL; analysis time: 12min; column temperature : 35 DEG C; Mobile phase A is methyl alcohol, contains molar number and is 2mmol / L ammonium acetate and mass number 0.1% formic ...

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Abstract

The invention belongs to the technical field of wastewater treatment and discloses a method and a device for improving wastewater treatment biological film forming efficiency, aiming to solve the problems of low film forming efficiency, high cost and low applicability in the prior art. The device comprises a magnetic stirrer, a three-neck flask is arranged on the magnetic stirrer, a bacterial solution is fed into an ultrafiltration cross-flow filter device from a lower sample inlet of the ultrafiltration cross-flow filter device through a bacterial solution feeding port and a first peristaltic pump pipeline, and a sample outlet of the ultrafiltration cross-flow filter device is connected with an excretion feeding head of a reactor through a second peristaltic pump. The method and the device have the advantages that different quick film forming means are selected according to the content of homoserine lipid materials under same conditions, high film forming efficiency, low cost and high applicability are realized, effective film forming is realized to the greatest extent, integral film forming time is shortened, and the risk of adopting a packing process is minimized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, and more specifically relates to a device and a method for improving the efficiency of biofilm formation in wastewater treatment. Background technique [0002] In the current secondary biochemical treatment system of sewage treatment, activated sludge method and biofilm method occupy the dominant position in biological treatment. The biofilm method has been widely concerned and applied due to its advantages such as strong adaptability to water quantity and quality, good removal of organic matter, nitrogen and phosphorus removal, and heavy metal removal, and low power cost. Biofilms are mainly composed of prokaryotes and other microorganisms (such as yeasts, fungi, and protozoa) and their secreted extracellular polymers (EPSs), and generally undergo a cycle of initial adhesion, growth, maturation, and aging of biofilms. The carriers of wastewater treatment biofilms generally include soft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/34
CPCC02F3/00C02F3/34
Inventor 任洪强王瑾丰丁丽丽朱点钰
Owner NANJING UNIV
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