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Method and device for sewage treatment and recovery

A sewage treatment and recovery method technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of sewage treatment with half the effort and difficult problems

Inactive Publication Date: 2012-05-16
沈新荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although a large number of organic and inorganic pollutants can be removed through microbial water purification, the introduction of sludge from microbial breeding sites has also brought huge difficulties to sewage treatment, making the purified water contain a large number of impurities, which undoubtedly makes sewage treatment difficult. work more with less

Method used

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  • Method and device for sewage treatment and recovery
  • Method and device for sewage treatment and recovery
  • Method and device for sewage treatment and recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: Cultivate mature activated sludge: sewage enters the activation tank through the water input pipe, adjust the sewage BOD5 to 200mg / L, and carry out continuous aeration at 15-20°C, the activated sludge flocs continue to increase, and after one week When the aeration is stopped, the sedimentation is static for 1 hour, and the supernatant liquid accounting for 60% of the total volume is discharged, the sewage water inflow is adjusted, and the aeration is continued until the sedimentation ratio is close to 30%, and the cultivation is completed. Then add polyurethane foam microbial carrier to the sewage to be treated so that its concentration in the sewage is 10g / L, and finally add biologically active sludge to make the sludge concentration of the whole purification system reach 15g / L, and continue to pass through the sludge containing After 6 hours of oxygen gas, biological purification is carried out for 24 hours; after the sewage is treated by biological purific...

Embodiment 2

[0057] Example 2: Cultivate mature activated sludge: sewage enters the activation tank through the water input pipe, adjust the sewage BOD5 to 250mg / L, and carry out continuous aeration at 15-20°C, the activated sludge flocs continue to increase, and after one week When the aeration is stopped, the sedimentation is still for 1.2 hours, and the supernatant liquid accounting for 65% of the total volume is discharged, the sewage water inflow is adjusted, and the aeration is continued until the sedimentation ratio is close to 30%, and the cultivation is completed. Then add polypropylene foam microbial carrier to the sewage to be treated so that its concentration in the sewage is 10g / L, and finally add biologically active sludge to make the sludge concentration of the whole purification system reach 15g / L, and pass through the sewage containing Oxygen gas is used for biological purification; after the sewage is treated by biological purification, it enters the five sets of sewage fi...

Embodiment 3

[0058] Example 3: Cultivate mature activated sludge: sewage enters the activation tank through the water input pipe, adjust the sewage BOD5 to 300mg / L, and carry out continuous aeration at 15-20°C, the activated sludge flocs continue to increase, and after one week When the aeration is stopped, the sedimentation is still for 1.5 hours, and the supernatant liquid accounting for 70% of the total volume is discharged, the amount of sewage inflow is adjusted, and the aeration is continued until the sedimentation ratio is close to 30%, and the cultivation ends. Then add polypropylene foam microbial carrier to the sewage to be treated, so that its concentration in the sewage is 10g / L, and finally add biologically active sludge to make the sludge concentration of the whole purification system reach 15g / L, and continue to feed After 6 hours of oxygen-containing gas, biological purification is carried out for 24 hours; after the sewage is treated by biological purification, it enters th...

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Abstract

The invention discloses a method and a device for sewage treatment and recovery. Through the device for sewage treatment and recovery, sewage is subjected to biological purification and reverse osmosis filtration. The method provided by the invention utilizes the combination of a biological purification process and a reverse osmosis filtration process to realize sewage purification, effectively improves sewage purification efficiency, adopts the device which is simple and economic and is utilized for removing a mass of inorganic and organic pollutants and a mass of dissociative suspended matters in sewage, realizes that treated sewage reaches the discharge standard, and has effects superior to effects of a single biological purification method or a single reverse osmosis filtration method. Therefore, through the method and the device, a sewage treatment cost is reduced and a high sewage recycle value is obtained.

Description

technical field [0001] The invention relates to a sewage treatment and recovery method and device, belonging to the fields of chemical engineering and environmental protection. Background technique [0002] With the development of industry and the improvement of people's living standards, industrial and domestic water consumption has increased significantly, which has increased the discharge of sewage, such as steel industry sewage, food industry sewage, printing sewage, chemical sewage, etc. are the main sources of water pollution; In addition, domestic sewage is also a major source of pollution. Domestic sewage contains a large amount of inorganic substances such as chloride, sulfate, phosphate and sodium, potassium, calcium, iron and other carbonates, and organic substances such as cellulose, starch, fat, protein and urea. Discharge into the environment promotes the growth and mass reproduction of phytoplankton, forming red tides and algal blooms. According to reports, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 沈新荣
Owner 沈新荣
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