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Cleaner production technology for renewable targeted adsorption and pretreated organic biorefractory wastewater

A clean production and difficult-to-biochemical technology, which is applied in the treatment of production wastewater and the pretreatment of organic difficult-to-biochemical wastewater, can solve the problems of waste of resources, complicated process, high cost of reagents, etc., so as to save treatment cost, improve treatment efficiency, and solve the problem of degassing Unclean effect

Inactive Publication Date: 2017-10-17
江苏博纳科水务环保科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

The chemical method is generally based on the input of chemical reagents. This method makes it easy to cause secondary pollution in the wastewater treatment. At the same time, due to the high cost of reagents and the inability to recover high value-added organic substances in wastewater, it leads to waste of resources; Generally, extraction, concentration, and adsorption treatment are the main methods, but physical methods are likely to cause volatilization pollution of organic solvents, large consumption of adsorbents, and difficult regeneration of adsorption resins, which have the problems of high energy consumption, high cost, and complicated processes.
The above problems make the environmental protection treatment cost of organic refractory biochemical wastewater higher, and the recycling benefit is poor

Method used

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  • Cleaner production technology for renewable targeted adsorption and pretreated organic biorefractory wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this example, a clean production process of regenerable targeted adsorption pretreatment of organic wastewater that is difficult to biochemically is applied to the clean production of wastewater that is difficult to biochemically produce caprolactam, including the following steps:

[0030] (1) Using the toluene method to prepare the biochemically difficult organic wastewater produced in the caprolactam production process will flow down a high concentration of caprolactam, toluene, acetic acid and other impurities (a small amount of benzoic acid, hexahydrobenzoic acid, nitroterephthalic acid) Biochemically difficult organic wastewater is sent to a renewable targeted adsorption fixed bed device for targeted adsorption;

[0031] (2) Send the low-concentration biochemical overflow liquid that flows down after being adsorbed by the regenerable targeted adsorption fixed-bed device to the biochemical treatment device for treatment;

[0032] (3) The renewable targeted fixed-...

Embodiment 2

[0039] The steps of a clean production process for regenerable targeted adsorption pretreatment of organic refractory wastewater described in this example are the same as those in Example 1, with the difference that ethanol is regenerated with a sulfuric acid solution with a mass fraction of 1.4%. The final regenerable targeted adsorption device is forced to regenerate.

Embodiment 3

[0041] In this example, a clean production process for pre-treating biochemically difficult organic wastewater by reproducible targeted adsorption is applied to clean production for treating biochemically difficult acrylonitrile production wastewater, including the following steps:

[0042] (1) The organic wastewater produced in the acrylonitrile production process is prepared by the propylene ammoxidation method, and the high-concentration biochemically difficult organic wastewater containing acrylonitrile, acetonitrile and other organic impurities (a small amount of acrolein and acrylic acid) is sent to the renewable target Targeted adsorption to an adsorption fixed bed device;

[0043] (2) Send the low-concentration biochemical overflow liquid that flows down after being adsorbed by the regenerable targeted adsorption fixed-bed device to the biochemical treatment device for treatment;

[0044] (3) The regenerable targeted fixed-bed adsorption device that has adsorbed satura...

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Abstract

The invention belongs to the field of wastewater treatment, and particularly relates to a cleaner production technology for renewable targeted adsorption and pretreated organic biorefractory wastewater. Before a biochemical treatment device, a targeted fixed-bed adsorption device is additionally arranged, low-concentration organic matters containing overflowing fluid obtained through adsorption of the targeted fixed-bed adsorption device flows into a simple biochemical treatment device; fixed-bed targeted adsorbed adsorbent resin is subjected to a chromatography and desorption technology to obtain organic matter-containing chromatographic solution and desorption solution; after being subjected to adsorbent chromatography, kettle residual liquid is subjected to distillation and solvent removal and recycling to obtain high value added organic matters; after desorption of the adsorbent, kettle residual liquid is subjected to distillation and solvent removal and recycling to obtain high-concentration organic impurities which can be emitted after being subjected to incineration treatment. The bad biochemical treatment effect caused by biorefractory organic matters contained in waste liquid can be solved; the resource recycling utilization can be realized, pollution emission can be reduced, the pollution can be decreased, the treatment cost of organic waste liquid can be saved, the economic benefits can be generated, and the cleaner production can be realized.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a treatment method for production waste water, in particular to a pretreatment method for organic refractory waste water. Background technique [0002] Organic difficult-to-biochemical wastewater is a kind of industrial organic wastewater that is difficult to biochemically treat. Because it usually has the characteristics of high COD and low BOD, or the presence of organic matter that inhibits the growth of microorganisms, its biodegradability is poor. In order to achieve subsequent treatment, it is generally necessary to increase the ratio of BOD to COD of wastewater through a pretreatment process, and remove organic matter that inhibits microbial growth, in order to improve the biochemical properties of wastewater. Typical organic refractory biochemical wastewater includes pharmaceutical wastewater, papermaking wastewater, petrochemical wastewater, coking wastew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/28C02F101/30
CPCC02F1/04C02F1/288C02F3/00C02F9/00C02F2001/5218C02F2101/30C02F2303/16
Inventor 吕志徐明徐心仪吕倩楠方成汤开佳汪亚
Owner 江苏博纳科水务环保科技有限公司
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