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Integrated device and method for promoting anaerobic sludge granulation

An anaerobic sludge and granulation technology, which is applied in anaerobic digestion treatment, chemical instruments and methods, biological treatment devices, etc., can solve the problem of low contact efficiency between signal molecules and anaerobic sludge particles, and the inability to accurately control anaerobic sludge. The problem of sludge particle growth and random addition of signal molecules can achieve the effects of shortening the anaerobic sludge granulation cycle, improving contact efficiency, and reducing costs

Active Publication Date: 2017-11-17
NANJING UNIV
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the existing anaerobic sludge granulation technology, the addition of signal molecules is random, the contact efficiency between signal molecules and anaerobic sludge particles is low, and the signal molecules cannot accurately control the growth of anaerobic sludge particles. The present invention provides a An integrated device and method for promoting anaerobic granulation

Method used

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  • Integrated device and method for promoting anaerobic sludge granulation
  • Integrated device and method for promoting anaerobic sludge granulation
  • Integrated device and method for promoting anaerobic sludge granulation

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Experimental program
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Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the device of the present embodiment comprises a regulating pool 1, a dosing pool 3, an EGSB reactor 6 and an outlet pool 8, the outside of the EGSB reactor is a water bath insulation layer 5, and the water outlet of the regulating pool 1 is connected with the water inlet pump 2 in turn through a pipeline. , the bottom water inlet of the EGSB reactor 6 is connected, and the water outlet of the dosing pool 3 is connected to the dosing inlet 12 of the dosing device 9 integrated in the lower part of the dosing pump 4 and the EGSB reactor 6 through pipelines successively, and the EGSB reaction The reflux water outlet at the upper end of the reactor is connected to the reflux pump and the reflux water inlet at the lower part of the EGSB reactor in turn through pipelines, and the water outlet at the top of the EGSB reactor is connected to the water outlet pool.

[0043] Such as figure 2 As shown, the outer circumferential surface of the cylindrica...

Embodiment 2

[0047] Using two sets of integrated devices of the present invention, the structures of the two sets of devices are the same, and the difference is that: one set does not add signal molecules, which is marked as R0; the other set adds signal molecules, which is marked as R1. At the same time, the same anaerobic sludge was inoculated to start granulation, and the granulation rate was compared.

[0048] The initial inoculum concentration is 30g / L, the average particle size of the sludge is 92μm; the effective volume of the integrated device is 1.87L.

[0049] The sewage is simulated organic wastewater in the laboratory, and its components are: glucose 1111-3333mg / L, ammonia nitrogen 27.8-83.3mg / L, sodium dihydrogen phosphate dihydrate 28-83.9mg / L, sodium bicarbonate 1000- 3000mg / L; trace elements are also added to the organic wastewater, and the concentrations of trace elements are respectively, the concentration of iron ions is 5.2mg / L, the concentration of calcium ions is 10.8...

Embodiment 3

[0059] Using two sets of integrated devices of the present invention, one without adding signal molecules and one with adding signal molecules, at the same time inoculate the same anaerobic sludge to start granulation, and compare the granulation rates.

[0060] The integrated device without adding signal molecules was used as the control group, denoted as R0, and the integrated device added with signal molecules was used as the experimental group, denoted as R1. The initial inoculum concentration is 30g / L, the average particle size of the sludge is 122μm; the effective volume of the integrated device is 1.87L.

[0061] The sewage is simulated organic wastewater in the laboratory, and its components are: glucose 1111-3333mg / L, ammonia nitrogen 27.8-83.3mg / L, sodium dihydrogen phosphate dihydrate 28-83.9mg / L, sodium bicarbonate 1000- 3000mg / L; trace elements are also added to the organic wastewater, and the concentrations of trace elements are respectively, the concentration of...

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Abstract

The invention discloses an integrated device and method for promoting anaerobic sludge granulation, and belongs to the field of organic wastewater treatment. The device comprises an adjusting pool, a reactor body and a water discharging pool, and also comprises a water feeding pump, an outer circulating pump, a chemical adding pump and a chemical adding device integrated inside the reactor body. The contact efficiency of acylated homoserine lactone (AHL) signal molecules and anaerobic sludge can be effectively improved, and the granulation rate is increased. Compared with the prior art, the method for promoting anaerobic sludge granulation has the advantages of being high in anaerobic sludge granulation efficiency and low in cost, the required time of granulation can be greatly shortened, the stability of formed granulation sludge is good, and operation is convenient.

Description

technical field [0001] The invention belongs to the field of organic wastewater treatment, and in particular relates to an integrated device and method for promoting anaerobic sludge granulation, which is used for treating organic wastewater. Background technique [0002] From the perspective of the growth mode of microorganisms in the reactor, wastewater bioreactors are divided into two types: the first is the attached growth reactor, the microorganisms of this type of reactor grow in the form of biofilm on the solid support, and the disadvantage is that the filler is expensive , the processing load is relatively low, and the power consumption is large; the second is a suspension growth reactor, which requires stirring (or other methods) to keep the microorganisms in suspension. Suspension growth reactor is a perfect combination of granular fluidized bed technology and bioreactor. It uses granular sludge as the biological phase and overcomes the shortcomings of suspended fl...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/2846C02F3/2866C02F2203/006
Inventor 任洪强马海军耿金菊丁丽丽
Owner NANJING UNIV
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