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

A treatment process for high-concentration biochemically difficult organic wastewater

A technology for organic wastewater treatment and organic wastewater, which is applied in biological water/sewage treatment, textile industry wastewater treatment, multi-stage water treatment, etc. It can solve the problems of restricted recycling, abnormal production, waste of water resources, etc.

Active Publication Date: 2018-11-06
ZHEJIANG DONGYANG ENVIRONMENTAL ENG
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After one cycle, the TDS of the system will increase to 3400mg / L, and after the second cycle, it will increase to 4560mg / L. After multiple cycles, the TDS in the recycled water will cause the production to fail normally.
[0004] Conventional physical and chemical methods, biological methods, etc. can be used to meet national and local wastewater discharge standards (COD<100mg / L, SS<60mg / L, pH6-9), but there are still some organic matter and microorganisms in the wastewater after the treatment reaches the standard. , colloids, suspended particles, and a large amount of soluble inorganic salts, etc., which limit their recycling, and directly discharge waste water resources

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
  • A treatment process for high-concentration biochemically difficult organic wastewater
  • A treatment process for high-concentration biochemically difficult organic wastewater
  • A treatment process for high-concentration biochemically difficult organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] according to figure 1 As shown, a treatment process for high-concentration refractory organic wastewater includes a main treatment channel 1 and a circulation channel 2;

[0034] Main treatment channel 1, including: wastewater inlet 11 connected by the main pipeline, adjustment and oxygenation tank 12, air flotation device 13, composite organic wastewater treatment device 14, electrodialysis device 15, ultrafiltration device 16, membrane desalination device 17. Biochemical device 18 and wastewater outlet 19. Wastewater enters the equipment from wastewater inlet 11, and is discharged from wastewater outlet 19 after various treatments; electrodialysis device 15 is provided with salt outlet 151; membrane desalination device 17 is provided with pure water outlet 171;

[0035] The circulation channel 2 includes: a first circulation channel 21 and a second circulation channel 22; the first circulation channel 21 includes a regulating and aerobic tank 12, an air flotation device 13,...

Embodiment 2

[0044] The difference from Example 1 above is that according to image 3 As shown, the circulation channel 2 further includes a third circulation channel 23. The third circulation channel 23 includes a production tank 231, a backwash pump 232, and a third return channel 233; the third circulation channel 23 is arranged in the electrodialysis device 15, the ultrafiltration device 16 and the membrane desalination device 17, the third return channel 233 returns the water in the production tank 231 to the corresponding equipment for backwashing; the third circulation channel 23 starts automatic backwashing every half an hour, and the flushing pass The amount is controlled at 100-120L / m2•hr; the backwash pressure is ≤0.2MPa; the backwash time is 20-40 seconds. The third circulation channel 23 is added for automatic backwashing of the electrodialysis device 15, the ultrafiltration device 16, and the membrane desalination device 17, which can effectively protect the functional membrane...

Embodiment 3

[0046] The difference from Example 1 above is that according to Figure 4 As shown, a COD detection device 183 is provided at the junction of the biochemical device 18 and the second return channel 221 to control the COD of the discharged water to be below 100 ml / L.

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
surface load factoraaaaaaaaaa
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of sewage treatment, particularly a treatment technique of high-concentration biorefractory organic wastewater. The technique comprises a main treatment channel and a circulating channel, wherein the main treatment channel comprises a wastewater inlet, a regulating facultative anaerobic tank, a floatation device, a composite organic wastewater treatment device, an electrodialysis plant, an ultrafiltration device, a membrane demineralizing device, a biochemical device and a wastewater outlet which are sequentially connected; wastewater enters the equipment from the wastewater inlet, and is discharged out of the wastewater outlet after being treated by all the parts; the electrodialysis plant is provided with a salt outlet; the membrane demineralizing device is provided with a pure water outlet; the circulating channel comprises a first circulating channel and a circulating channel; the first circulating channel is used for returning sludge treated by the composite organic wastewater treatment device to the regulating facultative anaerobic tank; and the second return channel is used for returning part of wastewater generated by the biochemical device to the regulating facultative anaerobic tank.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment process for high-concentration organic wastewater that is difficult to biodegrade. Background technique [0002] High-concentration refractory organic wastewater is generally discharged from industries such as papermaking, leather, printing and dyeing, and food. The production wastewater of these industries is generally complex and has a wide variety of pollutants, usually with high CODcr, high BOD5, high SS concentration, and NH3 -High N concentration and high chroma. For example, a large amount of inorganic salts are added during the production of textiles, such as sodium carbonate, baking soda (sodium bicarbonate), sodium polyphosphate, table salt (sodium chloride), sodium sulfate (sodium sulfate), insurance Powder (sodium dithionite), etc., are basically transferred to wastewater after use and are the main pollutants of wastewater. If desalination is not performed, th...

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 Patents(China)
IPC IPC(8): C02F9/14C02F103/30
CPCC02F1/24C02F1/444C02F1/4693C02F1/56C02F3/025C02F9/00C02F2103/30C02F2201/007C02F2301/08
Inventor 秦小伟付伟王锋骆兴州
Owner ZHEJIANG DONGYANG ENVIRONMENTAL ENG