Caffeine production wastewater treatment method

A technology for producing wastewater and treatment methods, applied in biological water/sewage treatment, natural water treatment, sustainable biological treatment, etc. Decolorization function, high adsorption coagulation activity, the effect of overcoming polarization

Inactive Publication Date: 2010-07-21
HARBIN INST OF TECH
View PDF1 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the effluent of the existing caffeine production wastewater treatment method has a large content of organic and inorganic substances

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
  • Caffeine production wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0017] Specific embodiment one: the treatment method of caffeine production wastewater in this embodiment is as follows: one, the caffeine production wastewater is passed into the regulating tank, the pH of the wastewater is adjusted to 4 ~ 8, and the hydraulic retention time is 1 ~ 4h; The effluent of the pool is connected to the iron-carbon-Fenton oxidation pool, and then the volume concentration is 0.10L / m 3 ~0.50L / m 3 Add hydrogen peroxide into the iron-carbon-Fenton oxidation tank, and adjust the pH value to 4~5, and the hydraulic retention time to 2.0h~5h, in which Fe 2+ The concentration is 50~200mg / L; 3. Connect the effluent from the iron-carbon-Fenton oxidation tank to the air flotation tank, and the hydraulic retention time is 1 to 4 hours; 4. Connect the effluent from the air flotation tank to the upflow anaerobic sludge bed (UASB), the concentration of anaerobic sludge in the reactor is 15kg / m 3 ~30kg / m 3 , oxidation-reduction potential ORP3 ~20kg / m 3, the diss...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, concentrated sulfuric acid with a mass concentration of 98% is used to adjust the pH of the wastewater to 4-8. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step two, concentrated sulfuric acid with a mass concentration of 98% is used to adjust the pH value to 4-5. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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

PropertyMeasurementUnit
Codaaaaaaaaaa
Codaaaaaaaaaa
Login to view more

Abstract

The invention discloses a caffeine production wastewater treatment method, and relates to a wastewater treatment method. The method solves the problem that the content of organic and inorganic substances in effluent produced by the traditional caffeine production wastewater treatment method is high and cannot reach the second-level discharge standards of GB8978-96 'Integrated Wastewater Discharge Standard', and comprises the following steps: 1, adjusting pH of wastewater in a regulating pond; 2, pre-treating the wastewater in an iron-carbon-Fenton oxidation pond; 3, treating the wastewater in a floatation tank; 4, performing anaerobic hydrolysis-acidification treatment on the wastewater in a UASB reactor; 5, treating the wastewater in a biological contact oxidation pond; 6, treating the wastewater in a hydrolyzing multifunctional pond; 7, treating the wastewater in a high-efficiency activated sludge pond; and 8, treating the wastewater in a secondary sedimentation tank to obtain drain water. The whole removing rate of the method is 90 to 98 percent (mass); the pH of the drain water is 7 to 8; COD is 100 to 200 mg/L; ammonia nitrogen is 5 to 25 mg/L; and the color removal rate reaches the national second-level discharge standards.

Description

technical field [0001] The invention relates to a wastewater treatment method. Background technique [0002] Caffeine (1,3,7-trimethylxanthine) is an important central nervous system stimulant drug, which has antipyretic and analgesic effects, and a large amount of caffeine is used as a beverage additive. One source of caffeine is extracted from natural plants, and the other is artificially synthesized by chemical methods. Chemical synthesis is the main source of caffeine production. It has been following the dimethyl urea synthesis route proposed by Traube in 1900 with urea, monomethylamine and chloroacetic acid as the basic raw materials, and it is also the main source of caffeine wastewater. [0003] Caffeine production wastewater includes cyanide wastewater, washing wastewater, iron sludge wastewater, chlorine extraction wastewater, etc. Therefore, the composition of pollutants in caffeine wastewater is relatively complex, including lost production raw materials, react...

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): C02F9/14C02F1/66C02F1/72C02F1/24C02F3/28C02F3/06C02F3/12C02F3/34C02F103/36
CPCY02W10/10
Inventor 邱珊魏利马放徐善文黄金周爱梅杨基先
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap