Novel method for removing chromaticity in printing and dyeing wastewater by biological technology

A technology of printing and dyeing wastewater and biological method, which is applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., and can solve problems such as not being able to obtain ideal treatment effects

Inactive Publication Date: 2020-04-21
南京东极环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Common methods for treating this type of wastewater mainly include coagulation-sedimentation, adsorption, membrane separation, advanced oxidation technology, and biochemical methods. However, due to the high content of organic matter and high chroma in dye wastewater, these technologies cannot achieve ideal treatment effects. , especially for the removal of chroma in printing and dyeing wastewater, has always been a difficult point

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A novel biological method for removing chroma in printing and dyeing wastewater, specifically as follows:

[0030] (1) Add basalt fiber to the mixed acid of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:1, heat up to 55°C, stir for 30 minutes, remove, wash with water until neutral, dry, add to Add 1% deionized water, 5% cetyltrimethylammonium chloride and KH-550 to deionized water, heat up to 35°C, stir for 1 hour, remove, wash with water, and dry to obtain the improved Sexual basalt fiber;

[0031] (2) Mix cerium nitrate, yttrium nitrate, and erbium nitrate into concentrated hydrochloric acid at a mass ratio of 1:1:1. After heating and stirring to dissolve, heat up to 85°C to drive out the acid. When the pH reaches 6-7, cool to room temperature to obtain a rare earth solution, add the modified basalt fiber to the rare earth solution, the solid-liquid mass ratio of the modified basalt fiber to the rare earth solution is 1:50, and stir a...

Embodiment 2

[0038] A novel biological method for removing chroma in printing and dyeing wastewater, specifically as follows:

[0039] (1) Add basalt fiber to the mixed acid of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:2, heat up to 60°C, stir for 30 minutes, remove, wash with water until neutral, dry, add to Add 1.2% deionized water, 4% cetyltrimethylammonium chloride and KH-550 to deionized water, heat up to 30°C, stir for 1 hour, remove, wash with water, and dry to obtain improved Sexual basalt fiber;

[0040](2) Mix cerium nitrate, yttrium nitrate, and erbium nitrate into concentrated hydrochloric acid in a mass ratio of 1:1:1. After heating and stirring to dissolve, heat up to 80°C to drive out the acid. During this period, add water in time to keep the total volume unchanged. When the pH reaches 6-7, cool to room temperature to get the rare earth solution, add the modified basalt fiber to the rare earth solution, the solid-liquid mass ratio of th...

Embodiment 3

[0047] A novel biological method for removing chroma in printing and dyeing wastewater, specifically as follows:

[0048] (1) Add basalt fiber to the mixed acid of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 1:1.5, raise the temperature to 60°C, stir for 30 minutes, remove, wash with water until neutral, dry, add to Add 0.5% deionized water, 6% cetyltrimethylammonium chloride and KH-550 to deionized water, heat up to 35°C, stir for 1 hour, remove, wash with water, and dry to obtain the improved Sexual basalt fiber;

[0049] (2) Mix cerium nitrate, yttrium nitrate, and erbium nitrate into concentrated hydrochloric acid in a mass ratio of 1:1:1. After heating and stirring to dissolve, heat up to 90°C to drive out the acid. When the pH reaches 6-7, cool to room temperature to obtain a rare earth solution, add the modified basalt fiber to the rare earth solution, the solid-liquid mass ratio of the modified basalt fiber to the rare earth solution i...

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PUM

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Abstract

The invention provides a novel method for removing chromaticity in printing and dyeing wastewater by a biological technology, and relates to the technical field of sewage treatment. The method comprises the following steps: uniformly mixing a rare earth loaded modified basalt fiber and activated sludge, and adding the obtained mixture into a bioreactor; preparing a bacterial suspension from Bacillus coagulans, inoculating the bioreactor with the bacterial suspension, adding a culture solution, completing biofilm culturing, and performing domestication; and placing the bioreactor in a printingand dyeing wastewater pool, treating the printing and dyeing wastewater, measuring the chromaticity every day, and discharging the qualified printing and dyeing wastewater. When used to treat the printing and dyeing wastewater, the method has good chromaticity and COD removing effect and a high removing efficiency, and the chromaticity and the chemical oxygen demand are qualified after the treatment is performed for 30 h so as to achieve the discharge standard.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a novel biological method for removing chroma in printing and dyeing wastewater. Background technique [0002] Dyes are organic substances that give other substances vivid colors. Humans have used dyes for thousands of years, and more than 100,000 kinds of dyes are currently in commercial use. According to statistics, my country's dye production has reached 917,200 tons in 2014, ranking first in the world. According to different chemical structures, dyes can be divided into azo dyes, anthraquinone dyes, indigo dyes, sulfur dyes, cyanine dyes, triarylmethane dyes, etc. Among them, azo dyes are the most widely used, accounting for 65%-70% of all dyes. %. A large amount of printing and dyeing wastewater will inevitably be produced during the production and use of dyes. It is estimated that 1.6 million tons of dyes are produced in the world every year, and 10%-15% of the t...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/34
Inventor 唐思远翟后欢张恩琪
Owner 南京东极环境科技有限公司
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