Method for treating wastewater during production of gallic acid

A gallic acid and wastewater treatment technology, applied in biological water/sewage treatment, water/sewage treatment, sustainable biological treatment, etc., can solve the problems of large environmental pollution, high cost, and complicated wastewater treatment process, and achieve low operating costs , low loss, high processing stability and volume utilization

Active Publication Date: 2014-10-08
先微康新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

About 5-6 tons of waste water is produced for every ton of gallic acid produced. These waste waters are extremely polluting to the environment, and the waste water treatment process is complex and costly, which has become a major problem in the production of gallic acid.

Method used

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  • Method for treating wastewater during production of gallic acid
  • Method for treating wastewater during production of gallic acid
  • Method for treating wastewater during production of gallic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) The waste water produced by gallic acid is processed through a catalytic micro-electrolysis tower device and a flocculation precipitation process: get 500 milliliters of raw water and dilute it to 5 liters, add alkali to adjust the pH to 5, add 30 grams of hydrogen peroxide (content is 27%), and use a flow rate of 200 Milliliters per hour are pumped into the catalytic micro-electrolysis tower, 20 grams of lime is added to the effluent to adjust the pH to 10, and 10 milliliters of polyacrylamide (0.5%) is added to flocculate and precipitate.

[0067] (2) The effluent after flocculation and sedimentation is treated by anaerobic biological device equipped with high-efficiency compound strains of Lanbiqing (accustomed and lifted): the effluent after flocculation and sedimentation control COD≤6000mg / L, after being equipped with Lanbiqing Clear high-efficiency composite strains (acclimated and lifted) anaerobic biological device stay for 48 hours.

[0068] (3) The effluen...

Embodiment 2

[0072] (1) The waste water produced by gallic acid is processed through catalytic micro-electrolysis tower device and flocculation precipitation process: take 500 milliliters of raw water and dilute to 5 liters, add alkali to adjust pH to 5, add 45 grams of hydrogen peroxide (content is 27%), with flow rate 200 ml / hour is pumped into the catalytic micro-electrolysis tower, 20 grams of lime is added to the effluent to adjust the pH to 10, and 15 milliliters of polyacrylamide (0.5%) is added to flocculate and precipitate.

[0073] (2) The effluent after flocculation and sedimentation is treated by anaerobic biological device equipped with high-efficiency compound strains of Lanbiqing (accustomed and lifted): the effluent after flocculation and sedimentation control COD≤6000mg / L, after being equipped with Lanbiqing Clear high-efficiency composite strains (acclimated and lifted) anaerobic biological device stays for 60 hours.

[0074] (3) The effluent after anaerobic treatment of ...

Embodiment 3

[0078] (1) The waste water produced by gallic acid is processed through catalytic micro-electrolysis tower device and flocculation precipitation process: take 500 milliliters of raw water and dilute to 5 liters, add alkali to adjust pH to 5, add 60 grams of hydrogen peroxide (content is 27%), with flow rate 200 milliliters / hour is pumped into the catalytic micro-electrolysis tower, 20 grams of lime is added to the effluent to adjust the pH to 10, and 20 milliliters of polyacrylamide (content is 0.5%) is added to flocculate and precipitate.

[0079] (2) The effluent after flocculation and sedimentation is treated by anaerobic biological device equipped with high-efficiency compound strains of Lanbiqing (accustomed and lifted): the effluent after flocculation and sedimentation control COD≤6000mg / L, after being equipped with Lanbiqing Clear high-efficiency composite bacteria (acclimated and lifted) anaerobic biological device stays for 72 hours.

[0080] (3) The effluent of Lanbi...

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Abstract

The invention discloses a method for treating wastewater during production of gallic acid so as to reach national-level emission standard. The method comprises the following steps: (1) treating wastewater during production of gallic acid through a catalytic microelectrolysis tower device and a flocculent settling technology; (2) treating flocculent-settled effluent water through (acclimated) anaerobic organism technology filled with efficient composite strain; (3) conducting aerobic microorganism technology treatment to the effluent water subjected to anaerobic treatment; and (4) conducting deep oxidization and flocculent settling to the effluent water subjected to aerobic technology and then emitting the effluent water reaching the national-level emission standard. The method solves the difficulty of wastewater treatment during the production of gallic acid, and is small in investment, low in running cost and good in treatment effect.

Description

technical field [0001] The invention relates to the field of sewage treatment, and in particular provides a method for treating waste water in the production of gallic acid so as to meet the national first-level discharge standard. Background technique [0002] The production of gallic acid is made from forest plant gallnut or tara powder, etc., through alkaline hydrolysis, neutralization, refining and other processes. It is a fine chemical product with a wide range of uses, mainly used in organic synthesis, medicine, ink , coatings, defense, food, light industry and electronics industry. [0003] my country is a major producer of gallic acid as it is rich in resources of forestry plant gallnut, but the hydrolysis and refining process of gallic acid production will generate a lot of waste water. Gallic acid production wastewater mainly comes from the following three channels: 1. Hydrolysis wastewater, the wastewater is brown, the pH value is 0.5-1.5, and the content of vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461C02F1/72C02F1/74C02F3/34C02F3/28C02F3/02
CPCY02W10/10
Inventor 罗勇刘林谢龙生
Owner 先微康新材料科技有限公司
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