A method for treating wastewater in a membrane treatment system

Abstract

A wastewater treatment method in a membrane treatment system, comprising the following steps: 1) pretreatment; 2) impurity removal; 3) pressurized reaction; 4) security filter filtration; 5) removal of inorganic ions and other substances; 6) fluidized bed Reaction; 7) pH adjustment; 8) Backflow control; 9) Circulation treatment; 10) Reset of the third control valve: After the wastewater in step 9 is discharged and treated, repeat steps 2-7 to continue the circulation treatment until the raw water treatment is completed. The invention has simple structure and remarkable effect, can effectively solve the problem of wastewater treatment in the membrane treatment system, reduce the total dissolved solid content in the wastewater, achieve the purpose of direct discharge, reduce environmental pollution, truly realize energy saving and environmental protection, and improve membrane efficiency. Treatment of water production rate has significant social and economic benefits.

Description

technical field

[0001] The invention relates to wastewater treatment, in particular to a wastewater treatment method in a membrane treatment system. Background technique

[0002] With the full implementation of the "Drinking Water Sanitation Standard" (GB5749-2006), the quality of drinking water for urban residents has been comprehensively improved, and water treatment has begun to be gradually upgraded to membrane treatment technology. However, the total dissolved solids in the wastewater of membrane treatment systems are all High, according to the requirements of "Water Quality Standard for Sewage Discharged into Urban Sewers" (CJ343-2010) (hereinafter referred to as the standard), most of the wastewater cannot be discharged to the sewer normally, but is directly discharged into the river, but it will cause certain environmental damage. Adverse effects, this part of wastewater is usually blended with a large amount of raw water to reduce the total dissolved solids index in...

Examples

Embodiment Construction

[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and specific circumstances.

[0018] In the specific implementation of the present invention, the raw water flow rate is 25000 m 3 / d, take the three-cycle process as an example, which is given by the following examples.

[0019] A method for treating wastewater in a membrane treatment system, comprising the following steps:

[0020] 1) Preprocessing: Set the first PLC controller 19 and the second PLC controller 15, and the first PLC controller 19 and the second PLC controller 15 control the first control valve 1 and the third control valve 17 to be in an open state , the raw water enters the submerged ultrafiltration membrane 2 through the water inlet pipe;

[0021] 2) Impurity removal: The raw water inflow in the immersed ultrafiltration membrane 2 is 25000m 3 / d, by siphoning the raw water from the outside of the hollow fiber membrane t...

technical field

[0001] The invention relates to wastewater treatment, in particular to a wastewater treatment method in a membrane treatment system. Background technique

[0002] With the full implementation of the "Drinking Water Sanitation Standard" (GB5749-2006), the quality of drinking water for urban residents has been comprehensively improved, and water treatment has begun to be gradually upgraded to membrane treatment technology. However, the total dissolved solids in the wastewater of membrane treatment systems are all High, according to the requirements of "Water Quality Standard for Sewage Discharged into Urban Sewers" (CJ343-2010) (hereinafter referred to as the standard), most of the wastewater cannot be discharged to the sewer normally, but is directly discharged into the river, but it will cause certain environmental damage. Adverse effects, this part of wastewater is usually blended with a large amount of raw water to reduce the total dissolved solids index in...

Examples

Embodiment Construction

[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and specific circumstances.

[0018] In the specific implementation of the present invention, the raw water flow rate is 25000 m 3 / d, take the three-cycle process as an example, which is given by the following examples.

[0019] A method for treating wastewater in a membrane treatment system, comprising the following steps:

[0020] 1) Preprocessing: Set the first PLC controller 19 and the second PLC controller 15, and the first PLC controller 19 and the second PLC controller 15 control the first control valve 1 and the third control valve 17 to be in an open state , the raw water enters the submerged ultrafiltration membrane 2 through the water inlet pipe;

[0021] 2) Impurity removal: The raw water inflow in the immersed ultrafiltration membrane 2 is 25000m 3 / d, by siphoning the raw water from the outside of the hollow fiber membrane t...

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