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Method for producing regenerated water through combined process of magnetic separation and purification-shallow medium filtration

A medium filtration, combined process technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of unstable combined system, large area, complex structures, etc. , to achieve the effect of easy management and maintenance, small footprint and large amount of treated water

Inactive Publication Date: 2012-10-31
SCIMEE TECH & SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these combined processes have defects in technical and economic indicators. In the actual construction and operation of engineering projects, problems such as complex structures, large floor area, high investment costs, and high operating costs have occurred. Combination system is unstable, prone to failure and other problems

Method used

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  • Method for producing regenerated water through combined process of magnetic separation and purification-shallow medium filtration

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This process is used to treat the secondary effluent of a municipal sewage treatment plant in depth, with a treatment scale of 40,000m 3 / d, water quality COD is 35 mg / L, suspended matter is 20 mg / L, total phosphorus is 1.4 mg / L, total nitrogen is 25 mg / L, ammonia nitrogen is 12 mg / L, and fecal E. coli is 40,000 / L. The raw water is pumped into the disk separation unit, and the agent is added in the equipment. Under the stirring state, 20g / m is added first. 3 Coagulate with polyaluminum chloride, then add 80mg / l magnetic seed with 6Gs remanence, mix, and then add 1g / m 3 Polyacrylamide (chemical formula 10 million) is coagulated to form flocs. After being purified and separated by the disk separation unit, the magnetic seeds contained in the sludge are recycled and reused, with a recovery rate of 98.5%; the effluent flows into the disinfection unit by gravity, and the Add sodium hypochlorite 4mg / L; the effluent is pumped into shallow medium for filtration, and the water ...

Embodiment 2

[0028] In this process comparison test, the secondary effluent of a sewage treatment plant in a county and town was selected. The treatment scale was 10,000 m3 / d. ~3mg / L, total nitrogen is 30 mg / L, ammonia nitrogen is 14 mg / L, fecal E. coli is 40000~60000 / L. Under the same water inflow and chemical conditions, the following three processes are used to treat the secondary effluent respectively. Process 1: Raw water is pumped into the disk separation unit, after treatment, it is pumped into the shallow medium for filtration, and finally flows into the disinfection unit by gravity and then the water is discharged ; Process 2: Raw water is pumped into the shallow medium for filtration, and after treatment, it flows into the disk separation unit, and finally flows into the disinfection unit by gravity; Process 3 (the process of the present invention): Raw water is pumped into the disk separation unit, and the treated water flows into the disinfection unit by gravity unit, and final...

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Abstract

The invention belongs to a sewage treatment method in water treatment, and particularly relates to a method for producing regenerated water through the combined process of magnetic separation and purification-shallow medium filtration. Secondary effluent in a sewage treatment plant or water meeting the similar water quality standard is taken as raw water, and the raw water is subjected to magnetic separation and purification, disinfection and sand filtration and then is reused. Compared with the prior art, the method has the advantages that the magnetic disk separation technology can achieve the high-efficiency dephosphorization that cannot be achieved in the traditional advanced treatment process as well as the performance of heavy metal, the effluent effect reaches or is superior to that of the traditional advanced treatment process, and the reuse requirement of regenerated water can be met.

Description

technical field [0001] The invention belongs to a sewage advanced treatment method in water treatment, in particular to a method for producing regenerated water through a combined process of magnetic separation purification and shallow medium filtration. Background technique [0002] As a country with poor water resources and uneven distribution, due to the needs of rapid social and economic development this year, the pollution of domestic water resources has continued to deteriorate, and surface water and groundwater resources have become increasingly scarce. The importance of reclaimed water after municipal sewage and industrial wastewater treatment as a second water source has been increasingly recognized by the society, and it is widely used for urban landscape water, industrial cooling water, municipal miscellaneous water, etc. [0003] The subsequent advanced treatment technology of reclaimed water has also attracted much attention at home and abroad. The existing trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12
Inventor 王吉白倪明亮
Owner SCIMEE TECH & SCI CO LTD
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