Printing and dyeing wastewater biochar filter saturated filler functional reutilization method

A printing and dyeing wastewater and biological aerated filter technology, which is applied in chemical instruments and methods, sustainable biological treatment, textile industry wastewater treatment, etc., can solve the problems of the lack of research on the treatment and disposal of waste fillers, the acceleration of mass transfer process, and the waste of resources and other issues, to achieve the effect of improving the biological treatment effect, reducing investment and operating costs

Inactive Publication Date: 2019-04-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of printing and dyeing wastewater treatment, with the increase of aeration time, the filler GAC is gradually adsorbed and saturated and the biofilm on the surface of GAC is continuously thickened. In order to ensure the efficient and stable operation of BAF, the filter needs to be backwashed to release the on the filter material. Intercepted suspended solids, increased biofilm activity

Method used

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  • Printing and dyeing wastewater biochar filter saturated filler functional reutilization method

Examples

Experimental program
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Example Embodiment

[0024] Example 1

[0025] A method for functionalized reuse of saturated fillers in a biological carbon filter for printing and dyeing wastewater, including the following steps:

[0026] Step 1): Add iron powder and saturated granular activated carbon with a mass ratio of 1:6 into the hydrothermally sealed reactor, the volume is 50% of the volume of the reactor, and add water to the reactor to raise the liquid level to an effective height. 70%, using steam heating method, airtight heating until the temperature of the sludge in the kettle is 180°C, keeping it for 160 minutes;

[0027] Step 2): After the hydrothermal reaction is completed, after the reaction kettle is reduced to room temperature, the mixture in the kettle is discharged and separated to obtain iron-carbon composite materials;

[0028] Step 3): Re-dosing the obtained iron-carbon composite filler into the biological aerated filter as a filler, the composite filler accounts for 35% of the total filler volume, the removal ra...

Example Embodiment

[0030] Example 2

[0031] A method for functionalized reuse of saturated fillers in a biological carbon filter for printing and dyeing wastewater, including the following steps:

[0032] Step 1): Add iron powder and saturated granular activated carbon with a mass ratio of 1:5 into the hydrothermally sealed reactor, the volume is 60% of the volume of the reactor, and add water to the reactor to raise the liquid level to an effective height 75%, heat-conducting oil heating method, airtightly heated until the temperature of the sludge in the kettle is 180℃, and keep it for 4h

[0033] Step 2): After the hydrothermal reaction is finished, after the reaction kettle is lowered to normal temperature, the material is discharged to the filtering device, and the iron-carbon composite material is obtained through filtration treatment;

[0034] Step 3): Re-dosing the obtained iron-carbon composite material into the biological aerated filter as a filler, the composite filler accounts for 45% of th...

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Abstract

The invention discloses a printing and dyeing wastewater biochar filter saturated filler functional reutilization method. The printing and dyeing wastewater biochar filter saturated filler functionalreutilization method is characterized by comprising extracting saturated granular activated carbon with enrichment of microorganisms and organic matters in a biological aerated filter, and feeding thesaturated granular activated carbon into a hydrothermally sealed reactor, feeding in iron powder, heating the reactor for hydrothermal reaction; after hydrothermal reaction is completed, cooling thereactor down to normal temperature, discharging materials and separating out ferric-carbon composite materials and hydrothermal liquid; feeding the ferric-carbon composite materials back into the biological aerated filter as the filler for in an intensified mode removing nitrogen, phosphorous and organic matters in printing and dyeing wastewater to achieve deep treatment on the printing and dyingwastewater; performing zerovalent iron Fenton reaction on the hydrothermal liquid to remove organic matters and heavy metal which are released into the hydrothermal liquid during the hydrothermal process, mixing processed effluent and the effluent of the biological aerated filter, and after the mixed effluent reaches the stand, discharging the effluent. The printing and dyeing wastewater biochar filter saturated filler functional reutilization method is simple in operation and easy to industrialize and provides a feasible method for functional utilization of printing and dyeing wastewater biochar filter saturated filler.

Description

technical field [0001] The invention relates to a method for functionalized reuse of saturated fillers in biochar filters of printing and dyeing wastewater, which belongs to the technical field of environmental protection. Background technique [0002] The general textile process includes: singeing, desizing, scouring, bleaching, dyeing, printing, finishing and other processes. Printing and dyeing wastewater is a general term for the wastewater generated in the above process links. In actual production, printing and dyeing wastewater has complex components, large fluctuations in water quality, difficult to degrade organic matter, and poor biodegradability. It is difficult for conventional treatment methods to make the secondary biological treatment effluent meet the discharge requirements. Therefore, it is necessary to develop advanced treatment on the basis of secondary treatment. Commonly used methods for sewage plant renovation. [0003] At present, an advanced treatment...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F103/30
CPCC02F3/106C02F2103/30Y02W10/10
Inventor 陈红王晓暖张艾于鑫张羽沈玉叶张禾李贤英刘祥刘自豪张文娟郭志超方庭玕孙敏安婧
Owner DONGHUA UNIV
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