Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for purifying wastewater from anthocyanin production

A technology for producing wastewater and anthocyanins, applied in the chemical industry, can solve problems such as failing to meet national discharge standards, achieve good decolorization effects, reduce pollutant indicators, and improve stability.

Inactive Publication Date: 2019-02-12
天津市尖峰天然产物研究开发有限公司
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors of the present invention have made relevant attempts in their work, but found that, due to the darker color of the sewage after extraction of anthocyanins, none of the above treatment methods can meet the national discharge standards

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for purifying wastewater from anthocyanin production
  • Method for purifying wastewater from anthocyanin production
  • Method for purifying wastewater from anthocyanin production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] refer to figure 1 The process flow chart of the present embodiment, the method of the present embodiment comprises the steps:

[0048] (1) The production wastewater produced after the production of anthocyanin products (the indicators of the wastewater are: COD is 5500, BOD is 3100, pH=3) is passed into the adjustment pool and the acid-base pool in turn. Add a sodium hydroxide aqueous solution with a concentration of 31 wt% in the acid-base pool to adjust the pH to 9. The wastewater was taken for testing, and the indicators of the wastewater became COD 5480, BOD 3080, pH=9, and chromaticity value (multiple) 716.

[0049] (2) Transport the pH-adjusted wastewater to the flocculation / slant tube settling tank. Add high-efficiency decolorizing flocculant polyacrylamide (PAM) into the waste water according to the volume ratio of decolorizing flocculant and production waste water of 1:10000, and mix. The waste water was taken for detection, and the waste water index became ...

Embodiment 2

[0067] refer to figure 2 The process flow chart of the present embodiment, the method of the present embodiment comprises the steps:

[0068] (1) The production waste water (indicators of waste water: COD 5600, BOD 3150, pH=5) produced after the production of anthocyanin products is passed into the adjustment pool and the acid-base pool in turn. Add a sodium hydroxide aqueous solution with a concentration of 31 wt% in the acid-base pool to adjust the pH to 9. The wastewater was taken for testing, and the indicators of the wastewater became COD 5460, BOD 3120, pH=8, and chromaticity value (multiple) 716.

[0069] (2) Transport the pH-adjusted wastewater to the flocculation / slant tube settling tank. Through the decolorization flocculation agent tank, according to the volume ratio of the decolorization flocculant to the production wastewater is 1:10000, add the high-efficiency decolorization flocculant polyacrylamide (PAM) into the flocculation / slant tube settling tank, and mi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for efficiently removing color of wastewater from anthocyanin production. The method comprises the following steps: (1) adjusting the pH of the wastewater from anthocyanin production to 8-9; (2) adding a flocculating agent into the wastewater obtained in the step (1); (3) performing sedimentation treatment on the wastewater obtained in the step (2); (4) carrying out ultrasonic treatment on the wastewater subjected to the sedimentation treatment; (5) enabling the wastewater, obtained in the step (4), to be subjected to advanced oxidation treatment; (6) adjustingthe pH of the wastewater, obtained in the step (5), to 11-12, and heating up to 35-37 DEG C; then, carrying out filler absorption under the anaerobic condition and cycle treatment under the conditionof applying an electric field. The method provided by the invention enables the indexes such as chemical oxygen demand (COD) and biochemical oxygen demand (BOD) of the wastewater to be reduced to emission allowance while efficiently removing the color of the wastewater from anthocyanin production; furthermore, combined complete equipment is adopted, so that the operating cost is lowered, and a convenience is provided for later system technology upgrade and renewal.

Description

technical field [0001] The invention relates to the technical field of chemical industry, and relates to a method for purifying anthocyanin production wastewater, in particular to a method for efficiently removing the color of anthocyanin production wastewater. Background technique [0002] Anthocyanin is a water-soluble pigment, which is one of the main pigments that constitute the color of petals and fruits in nature, and its color can change with the change of the pH value of the solution. [0003] The production of anthocyanins has been carried out for many years, and the wastewater generated in the production process has a deep purple color and is difficult to treat. Specifically, the use of simple filtration methods is not effective; the use of adsorption methods requires frequent replacement of adsorbent materials and post-treatment of the adsorbent materials due to the large amount of wastewater generated; the use of membrane material equipment requires operating cos...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F9/14
CPCC02F1/36C02F1/56C02F1/66C02F1/78C02F3/005C02F3/2806C02F9/00C02F2001/007
Inventor 刘丹鞠大江吴巍
Owner 天津市尖峰天然产物研究开发有限公司