Processing method for reducing and recycling organic waste water and processing system

A treatment method and technology for organic wastewater, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of high treatment cost, high treatment cost and high pollutant concentration

Inactive Publication Date: 2016-05-04
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first kind of reclaimed water has many problems such as more foam, peculiar smell, corrosiveness and/or strong fouling in the actual use process due to the large residual macromolecular refractory organic matter and multivalent ions, and the scope of use is greatly restricted big limit
The second type of reclaimed water is water produced by reverse osmosis. Its water quality is better, but the treatment cost is expensive, and reverse osmosis produces a large amount of concentrated organic wastewater with high concentration of various pollutants, which cannot be dischar

Method used

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  • Processing method for reducing and recycling organic waste water and processing system
  • Processing method for reducing and recycling organic waste water and processing system
  • Processing method for reducing and recycling organic waste water and processing system

Examples

Experimental program
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Effect test

Embodiment 1

[0062] This embodiment is used to illustrate the waste water reduction and recycling treatment method and treatment system of the crushed coal pressurized gasification of the present invention.

[0063] Such as figure 1 The crushed coal pressurized gasification wastewater reduction and recycling treatment system shown mainly includes a pretreatment unit, a solid-liquid separation unit, a nanofiltration unit, a first reverse osmosis unit, and a second Two reverse osmosis units, an evaporation crystallization unit, and a nanofiltration concentrated water treatment unit connected between the concentrated water outlet of the nanofiltration unit and the outlet of the solid-liquid separation unit.

[0064] The technological parameters of the processing system are set as follows:

[0065] pre-processing unit

[0066] The subunits of the pretreatment unit are: pretreatment system and biochemical treatment system.

[0067] The subsystems of the pretreatment system are: inclined tube...

Embodiment 2

[0115] This embodiment is used to illustrate the petroleum refining wastewater reduction and resource recovery treatment method and its treatment system of the present invention.

[0116] Such as figure 2 The shown oil refinery wastewater reduction and resource recovery treatment system mainly includes a pretreatment unit, a solid-liquid separation unit, a nanofiltration unit, a first reverse osmosis unit, and a second reverse osmosis unit in sequential fluid communication , an evaporation crystallization unit, and a nanofiltration concentrated water treatment unit connected between the concentrated water outlet of the nanofiltration unit and the water outlet of the solid-liquid separation unit. The technological parameters of the processing system described in the present embodiment are set as follows:

[0117] (1) Pre-processing unit

[0118] The sub-units of the pre-treatment unit are: pre-treatment system, biochemical treatment system and advanced treatment system.

...

Embodiment 3

[0169] This embodiment is used to illustrate the printing and dyeing wastewater reduction and recycling treatment method and its treatment system of the present invention.

[0170] Such as image 3 The printing and dyeing wastewater reduction and recycling treatment system shown, the treatment system includes a pretreatment unit, a solid-liquid separation unit, a nanofiltration unit, a first reverse osmosis unit, a second reverse osmosis unit, an evaporation crystallization unit, and a sequentially connected unit, and a nanofiltration concentrated water treatment unit connected between the concentrated water outlet of the nanofiltration unit and the outlet of the solid-liquid separation unit. The technological parameters of the processing system of the present embodiment are set as follows:

[0171] (1) Pre-processing unit

[0172] The sub-systems of the pre-treatment unit are: hydrolytic acidification pool, aerobic pool, the main parameters:

[0173] The hydraulic retentio...

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Abstract

The invention provides a processing method for reducing and recycling organic waste water. The method comprises steps: (1) pre-treating waste water to obtain pre-treated out-water; (2) treating the out-water obtained from the step (1) through solid-liquid separation; (3) nano-filtering the out-water obtained from step (2); (4) treating nano-filtered concentrated water obtained from the step (3) to obtain out-water subjected concentrated water nano-filtering, returning to the step (3) for mixing the out-water subjected to concentrated water nano-filtering with the out-water subjected to solid-liquid separation, and performing nano-filtering; (5) performing first reverse osmosis treatment on out-water obtained from the step (3) through nano-filtering; (6) performing second reverse osmosis treatment on concentrated water obtained from the step (5) through first reverse osmosis treatment; and (7) evaporating and crystallizing a concentrated liquid obtained from the step (6) through second reverse osmosis treatment in order to obtain crystallized salt and evaporated concentrated water. The invention further provides a processing system of the method. Through the method and system, waste water is truly reduced and recycled.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a treatment method for organic waste water reduction and resource recovery, and an organic waste water reduction and resource recovery treatment system for implementing the method. Background technique [0002] At present, the emission standards of industries such as coal chemical industry, petrochemical industry, and printing and dyeing industry are becoming increasingly stringent. Wastewater reduction and resource utilization have gradually become an inevitable choice for all industries and society. In the actual treatment process, due to the constraints of treatment technology and treatment costs and other factors, the reclaimed water produced in the treatment process is mainly divided into two types: the first kind of reclaimed water is the filtered water after biochemical treatment, and this kind of reclaimed water can be recycled It is subdivided into multi-me...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F9/14C02F101/30
CPCC02F1/04C02F1/24C02F1/40C02F1/441C02F1/442C02F1/52C02F1/78C02F3/00C02F3/30C02F9/00C02F2101/30
Inventor 李春启梅长松刘学武岳培恒段世慈康善娇牟伟腾张文博
Owner DATANG INT CHEM TECH RESINST
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