Biological treatment method of coal gas waste water and coking waste water

A coking wastewater and biological treatment technology, applied in the direction of sustainable biological treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of poor sludge settling, slow sludge growth, and inability to remove o-cresol and other problems, to achieve the effect of improving treatment efficiency, high removal rate, and alleviating the pressure of nitrification load

Inactive Publication Date: 2009-03-18
SHANGHAI UNIV OF ENG SCI
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above, it can be seen that the anaerobic pretreatment has little significance for the subsequent aerobic nitrification, because the o-cresol cannot be removed in this section, and the removal of phenol is also limited.
[0008] Due to the neglect of the leading role of the aerobic treatment process and the actual ef

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
  • Biological treatment method of coal gas waste water and coking waste water

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] A gas plant produces an average of 2,000 cubic meters of wastewater per day. The current treatment process is: a three-stage activated sludge biological treatment system for oil removal-dephenolization-ammonia distillation. Due to the poor pretreatment effect, the water quality fluctuates greatly, which has a great impact on the subsequent biological treatment system, resulting in poor sludge settlement, serious biomass loss, and deterioration of the treatment effect. This new process has a better treatment effect on actual gas wastewater. The three-unit combined process of activated sludge method unit, anoxic biological filter unit and biological contact oxidation method unit is adopted. The first unit adopts the activated sludge method, and the second unit adopts anoxic biological filter for anoxic treatment. The third unit adopts the biological contact oxidation method to process the coal gas and coking wastewater in continuous flow operation. The acti...

Example Embodiment

[0031] Example 2

[0032] The current wastewater treatment process in a gas plant is the traditional activated sludge method. Due to the change of raw coal, the treatment effect of the system has deteriorated. Despite multiple modifications, the effluent effect is still not good. A three-unit combination process of aerobic-anoxic-aerobic is used for treatment. The first activated sludge method of the three-unit combined process is an activated sludge method with powdered materials, and its hydraulic retention time is 24 Hours, the solids retention time is 25 days; the subsequent second unit anoxic biological filter is filled with a 15 mm zeolite carrier, the control temperature of the anoxic section is 37℃, the control temperature of the aerobic section is 30℃, and the hydraulic retention time is After 10 hours, the subsequent third unit contact oxidation tank is filled with zeolite or organic carrier, and its hydraulic retention time is 10 hours.

[0033] The first unit of the ac...

Example Embodiment

[0036] Example 3

[0037] The biological treatment method of coal gas wastewater and coking wastewater adopted by a gas plant adopts a three-unit combination process of aerobic-anoxic-aerobic treatment. The first unit activated sludge method of the three-unit combination process is The activated sludge method with powder material has a hydraulic retention time of 20 hours and a solid retention time of 20 days; the second unit anoxic biological filter is filled with a zeolite carrier with a particle size of 10 mm, and the temperature in the anoxic section is controlled at 30°C The control temperature of the aerobic section is 25°C, and the hydraulic retention time is 10 hours. The subsequent third unit contact oxidation tank is filled with zeolite or organic carrier, and the hydraulic retention time is 10 hours.

[0038] The first unit of the activated sludge system and the third unit of the three-unit combination process have dissolved oxygen controlled at 8 mg / L, and the dissolve...

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 relates to a biological treatment method of coal gas waste water and coking waste water. The method adopts a combined process of an activated-sludge process unit, an anoxic biological filtering pool unit and a biological contact oxidation unit, and treats the coal gas waste water and the coking waste water in a continuous stream mode. The specific treatment process is as follows: firstly, in the activated-sludge process unit, raw waste water enters an activated-sludge reactor for aerobic biological treatment; after the aerobic biological treatment, the mixed liquor enters a secondary sedimentation tank to separate the sludge from the water. A part of precipitated sludge flows back to the reactor and the residual part is discharged; the separated water enters the anoxic biological filtering pool unit for anoxic treatment in the anoxic biological filtering pool unit and the treated water enters the biological contact oxidation unit for further aerobic biological treatment. Compared with the prior art, the method of the invention has the advantages of acceptance of waste water with higher concentration, high treatment efficiency, stable and reliable running and easy management, etc.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a biological treatment method for gas wastewater and coking wastewater. Background technique [0002] Both coal gas wastewater and coking wastewater belong to coal conversion wastewater, which is wastewater generated during the process of gas generation, coking and coking product recovery. Phenolic substances are the main components of organic matter in wastewater, accounting for about 60% to 80% of the total organic matter, including extended unit phenols, dihydric phenols and polyphenols; in addition, they also contain polycyclic aromatic hydrocarbons (PAHs), containing nitrogen, oxygen and Sulfur heterocyclic compounds, many of which are mutagenic substances; inorganic compounds in wastewater mainly include cyanide, rhodanide and a large amount of ammonia, all of which are pollutants strictly controlled in my country. Therefore, if the gas waste water is directly discharged int...

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): C02F9/14C02F3/12C02F3/08C02F1/52
CPCY02W10/10
Inventor 张文启
Owner SHANGHAI UNIV OF ENG SCI
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