Modified fly ash adsorption-UF-RO advanced treatment coking wastewater detection method

A technology of UF-RO and coking wastewater, applied in the detection field of modified fly ash adsorption-UF-RO advanced treatment of coking wastewater, can solve the problems of harsh regeneration conditions, low removal rate and troublesome operation of activated carbon

Inactive Publication Date: 2021-09-07
HEBEI UNIV OF ENVIRONMENTAL ENG
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) Most domestic coking plants at this stage use biochemical methods to treat this type of wastewater, which has a certain removal effect on phenol, cyanide and other substances in the wastewater, but the removal rate of COD and ammonia nitrogen is not high, and it is difficult to achieve the standard discharge or reuse
[0009] (2) The main problem encountered in the application of membrane separation is membrane fouling
Membrane fouling will lead to a decrease in membrane flux or an increase in membrane pressure difference during operation, and frequent chemical cleaning will lead to frequent replacement of membranes and increase the cost of water treatment
[0010] (3) The production cost of activated carbon is high, the regeneration conditions of activated carbon are harsh, the operation cost is high, the operation cost of equipment is high, and the operation is troublesome
[0011] The difficulty in solving the above problems and defects is: the removal rate of COD and ammonia nitrogen in coking wastewater by conventional biochemical methods is not high, and it is difficult to meet the discharge or reuse requirements. Membrane separation technology can improve the removal rate of COD and ammonia nitrogen, but membrane pollution It will increase the cost of water treatment. Activated carbon adsorption as a pretreatment of membrane separation can reduce the problem of membrane pollution and reduce the operating cost of membrane separation. However, the production, regeneration and operation costs of activated carbon are very high, which increases the overall operating cost of coking wastewater treatment. , at the same time, the exhausted activated carbon faces the problem of secondary pollution of the environment

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
  • Modified fly ash adsorption-UF-RO advanced treatment coking wastewater detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. Content

[0055] (1) Inorganic modification of fly ash and testing its adsorption performance.

[0056] Sodium hydroxide is used as a modifier to modify fly ash by hydrothermal method, and the modified fly ash is used to evaluate the adsorption performance of coking wastewater to test the ability and effect of modified fly ash to adsorb different types of pollutants .

[0057] (2) Based on the adsorption capacity of modified fly ash coking wastewater, determine the process conditions to achieve the maximum adsorption effect. The adsorption kinetics of coking wastewater by modified fly ash was studied.

[0058] Using a small experimental device in the laboratory, the secondary effluent of coking wastewater is used for adsorption of modified fly ash. By measuring the COD, ammonia nitrogen and turbidity of the influent and effluent, the pH value, dosage, and adsorption time of modified fly ash are studied. The influence of the conditions on the water quality of the m...

Embodiment 2

[0076] 1. Method

[0077] ① Preparation of inorganic modified particulate fly ash and test of its adsorption performance

[0078] Sodium hydroxide was used as modifier to modify fly ash by hydrothermal method. First, clean the original fly ash, wash it with deionized water for 3 to 4 times, then stir it with an electric mixer at a speed of 100r / min for 30min, and then settle it to remove the upper turbid liquid. The cleaned fly ash was dried in an oven at 105°C for 24 hours, during which it was stirred several times to prevent dry agglomeration. Grind on a ball mill, pass through a 120-mesh sieve, and dry for later use. Take 4 parts of a certain amount of pretreated fly ash, add 2mol / L, 4mol / L, 6mol / L, 8mol / L NaOH solution (solid-liquid ratio is 1g / 20mL) respectively to the fly ash, magnetically stir After 30 minutes, the solution was added to a polyethylene tetrafluoro reactor, and reacted in an electric constant temperature blast drying oven at 90°C for 2.5h, washed with ...

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 belongs to the technical field of coking wastewater evaluation, and discloses a modified fly ash adsorption-UF-RO advanced treatment coking wastewater detection method, which comprises: preparing inorganic modified particle fly ash, and testing the adsorption performance; screening out the optimal process parameters of the modified fly ash for adsorbing and deeply treating the coking wastewater, and determining the adsorption kinetics of the modified fly ash; and determining the optimal process conditions and action mechanism of the modified fly ash adsorption-UF-RO combined process for advanced treatment of the coking wastewater. By utilizing the porous structure and the adsorption characteristic of the modified fly ash, the adsorption removal of phenol, soluble organic matters and fine particulate matters in the coking wastewater is realized, so that the membrane pollution problem in the membrane separation process is reduced, the current national requirements on coking wastewater treatment are met, the operation cost is reduced, theoretical and technical bases are provided for ensuring that the coking wastewater meets stricter environmental protection standards and recycling, and the method has great significance in resource utilization and production cost reduction.

Description

technical field [0001] The invention belongs to the technical field of coking wastewater evaluation, and in particular relates to a detection method for modified fly ash adsorption-UF-RO advanced treatment coking wastewater. Background technique [0002] At present, coking wastewater refers to the wastewater generated in the process of coking, gas purification, chemical product recycling and chemical product refining. Its output is large, and it is toxic and refractory industrial organic wastewater with high concentration of organic matter, complex composition, large proportion of refractory substances, high content of inorganic salts and ammonia nitrogen, and pollution characteristics such as chromaticity, volatility, and foam. Pollutants contained in coking wastewater include phenols, polycyclic aromatic compounds, and heterocyclic compounds containing nitrogen, oxygen, and sulfur. , Mitazoles belong to degradable organic substances; refractory organic substances mainly i...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18G01N21/49G01N21/31B01J20/10B01J20/30
CPCG01N33/18G01N33/1806G01N21/31G01N21/49B01J20/06B01J20/08B01J20/041B01J20/103G01N2021/495
Inventor 王晓娜伦海波金泥沙
Owner HEBEI UNIV OF ENVIRONMENTAL ENG
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