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Treatment process for production wastewater of DSD acid

A technology for waste water production and treatment process, applied in natural water body treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Simple, easy-to-use effects

Inactive Publication Date: 2012-09-05
SHANXI YANGMEI FENGXI FERTILIZER IND GRPCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the biodegradable BOD to CODc ratio of DSD acid wastewater is only about 0.03, which is extremely difficult to degrade biologically, making DSD acid production wastewater one of the most difficult wastewater to treat at present.

Method used

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  • Treatment process for production wastewater of DSD acid
  • Treatment process for production wastewater of DSD acid
  • Treatment process for production wastewater of DSD acid

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of DSD acid production wastewater treatment process, comprises the following steps:

[0025] (1) Treatment of wastewater in the oxidation section: First, 20.2 tons of wastewater in the oxidation section produced by 1 ton of DSD acid is adsorbed by resin, and the wastewater passed through the resin is sent to the wastewater treatment system in the reduction section for treatment, and the high-concentration desorption liquid is sent to the flue gas Concentrate in the tower, then spray and dry to form solid waste residue, and prepare sulfamic acid-based water reducer from the solid waste residue;

[0026] (2) Wastewater treatment in the reduction section: 1 ton of DSD acid will produce 21.3 tons of wastewater in the reduction section and the wastewater in the oxidation section that passes through the resin will be blown off and then enter the domestic sewage, so that the ratio of BOD to CODc in the wastewater will increase to 0.3, then the MBR method will be used Me...

Embodiment 2

[0028] A kind of DSD acid production wastewater treatment process, comprises the following steps:

[0029] (1) Treatment of wastewater in the oxidation section: First, 20.8 tons of wastewater in the oxidation section produced by 1 ton of DSD acid is adsorbed by resin, and the wastewater passed through the resin is sent to the wastewater treatment system in the reduction section for treatment, and the high-concentration desorption liquid is sent to the flue gas Concentrate in the tower, then spray and dry to form solid waste residue, and prepare sulfamic acid-based water reducer from the solid waste residue;

[0030] (2) Wastewater treatment in the reduction section: 21.4 tons of wastewater in the reduction section produced by 1 ton of DSD acid and the wastewater in the oxidation section passed through the resin are blown off and then enter domestic sewage, so that the ratio of BOD to CODc in the wastewater increases to 0.32, and the MBR method is used Membrane bioreactor treat...

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Abstract

Belonging to the field of industrial wastewater treatment, the invention discloses a treatment process for the production wastewater of DSD acid. The process comprises the steps of: (1) oxidation section wastewater treatment: subjecting the oxidation section wastewater to resin adsorption first, sending the wastewater passing through the resin to a reduction section wastewater treatment system for treating, sending a high concentration desorption solution into a flue gas tower for condensation, then conducting spraying and drying so as to form solid waste residues that are adopted as a high efficiency water reducer; (2) reduction section wastewater treatment: carrying out air stripping to the reduction section wastewater and the oxidation section wastewater passing through the resin, thendelivering the wastewater into domestic wastewater so as to make the ratio of BOD (biochemical oxygen demand) to CODc of the wastewater increased to 0.3, conducting treatment with a MBR (meane biological reactor) method, then discharging the wastewater after reaching the discharge standard. With the process of the invention, the removal rate and CODCr removal rate can achieve over 98% and 90% respectively. The treatment process provided in the invention also has the advantages of simple equipment, simple operation, low operation cost, good treatment effect, easy engineering and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a DSD acid production wastewater treatment process. Background technique [0002] The full name of DSD acid is 4,4'-diaminostilbene-2,2'-disulfonic acid, chemical formula C 14 h 14 N 2 o 6 S 2 , the finished product is a light yellow paste or powder, soluble in ethanol and ether, insoluble in water, easily soluble in alkali solution, the product is easily oxidized into red, and has the properties of aromatic acids and amines; it is one of the important dye intermediates 1. It is mainly used in the synthesis of fluorescent whitening agents, direct dyes (Direct Frozen Yellow G, Direct Yellow, Fast Orange F-3G), acid dyes and reactive dyes, which are used in textiles, paper products, washing products and other light textiles industrial field. About 85% of domestic DSD acid consumption is used to synthesize stilbene fluorescent whitening agents (VBL, C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/36
Inventor 程国伟
Owner SHANXI YANGMEI FENGXI FERTILIZER IND GRPCO
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