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Hyperfiltration reverse- rinsing water recovery processing method and device thereof

A recycling device and recycling technology, applied in water/sewage multi-stage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low recycling efficiency, achieve high recycling efficiency and save water Good effect of resources and effluent quality

Inactive Publication Date: 2008-03-12
天津市华宇膜技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using conventional methods to recycle membrane backwash water has the following disadvantages: the one is that the recovery efficiency is low; Insects); third, the separated water needs to be sent back to the raw water for further purification treatment

Method used

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  • Hyperfiltration reverse- rinsing water recovery processing method and device thereof

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Experimental program
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Effect test

Embodiment 1

[0026] An experiment was carried out on the backwash water of an ultrafiltration membrane. The water quality conditions were: water temperature 12.3-14.2°C, pH 7.81-7.95, turbidity 5.21-8.14NTU, permanganate index 4.76-7.21mg / L, UV 254 0.042~0.045cm -1 . The membrane backwash water first enters the recovery adjustment tank, and then the amount of FeCl is added to the backwash water discharged from the recovery adjustment tank. 3 Coagulant FeCl calculated as 15mg / L 3 , the wastewater then enters the pipeline mixer for mixing, and the outlet water of the pipeline mixer enters the membrane tank of the submerged membrane device after adding 10mg / L powdered activated carbon. The suction negative pressure in the inner cavity passes through the membrane to obtain ultrafiltration backwash water and recover the effluent. The filtration cycle of the submerged membrane device is 20 minutes. After the filtration cycle is over, backwashing is performed, and one round of backwashing is p...

Embodiment 2

[0028] An experiment was carried out on the backwash water of an ultrafiltration membrane. The water quality conditions were: water temperature 13.2-14.8°C, pH 7.82-7.94, turbidity 6.34-7.56NTU, permanganate index 5.83-6.25mg / L, UV 254 0.044~0.057cm -1. Membrane backwash water first enters the recovery adjustment tank, and then the amount of FeCl is added to the backwash water discharged from the recovery adjustment tank. 3 Coagulant FeCl calculated as 20mg / L 3 , the waste water then enters the pipeline mixer for mixing, and the outlet water of the pipeline mixer enters the membrane tank of the submerged membrane device after adding 15mg / L powdered activated carbon. The suction negative pressure in the inner cavity passes through the membrane to obtain ultrafiltration backwash water and recover the effluent. The filtration period of the submerged membrane device is 25 minutes. After the filtration period, backwashing is performed, and two rounds of backwashing are performed...

Embodiment 3

[0030] An experiment was carried out on the backwash water of an ultrafiltration membrane. The water quality conditions were: water temperature 13.1-14.6°C, pH 7.76-8.02, turbidity 6.47-9.21NTU, permanganate index 5.63-7.12mg / L, UV 254 0.041~0.062 cm -1 . Membrane backwash water first enters the recovery adjustment tank, and then the amount of FeCl is added to the backwash water discharged from the recovery adjustment tank. 3 Coagulant FeCl calculated as 20mg / L 3 , the wastewater then enters the pipeline mixer for mixing, and the outlet water of the pipeline mixer enters the membrane tank of the submerged membrane device after adding 30mg / L powdered activated carbon. The suction negative pressure in the inner cavity passes through the membrane to obtain ultrafiltration backwash water and recover the effluent. The filtration period of the submerged membrane device is 25 minutes. After the filtration period, backwashing is performed, and two rounds of backwashing are performe...

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Abstract

The present invention discloses a recycling treatment method and a device of hyperfiltration backwashing water. The treatment method includes the following steps: a, the membrane backwashing water firstly enters a recycling regulating reservoir; b, the backwashing water discharged in the recycling regulating reservoir is added with 15 to 30 mg / L of coagulant FeCl3 calculated by FeCl3, and then waste water enters a pipeline mixer to mix; c, the yielding water of the pipeline mixer enters a membrane tank of an immersion membrane device after being added with 10 to 30 mg / L of power active carbon; d, the water entering the membrane tank is absorbed by filter pump and the hyperfiltration backwashing water recycling yielding water is acquired by the hydrostatic pressure and the absorbing subpressure of an inner chamber of the membrane permeating the membrane. The recycling method and device of the present invention have the advantages of high recycling efficiency, good water yielding quality, high self control degree and continuous operation of long time and low cost, etc . The quality of the water yielded meets the standard requirements of national drinking water. The present invention has reduced the discharge amount of wastewater.

Description

technical field [0001] The invention relates to a backwashing water recovery treatment method and a device thereof, in particular to a backwashing water recovery treatment method and a device thereof aimed at ultrafiltration membrane treatment of drinking water. Background technique [0002] In recent years, membrane technology has become the core technology concerned in the field of water treatment all over the world, especially ultrafiltration and microfiltration, which are widely used in drinking water treatment. However, in practical applications, ultrafiltration and microfiltration membrane systems require regular backwashing, usually every 15 to 60 minutes, resulting in a large amount of backwashing water. At present, there are two methods for the treatment and disposal of membrane backwash water: recycling or discharge. Discharges include discharges into nearby water bodies or into urban sewer networks. No matter what kind of discharge method is selected, it is a wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F1/52C02F1/28C02F1/44
Inventor 何文杰刘德滨胡建坤卜建伟李爱斌肖峰王健孙慧娴
Owner 天津市华宇膜技术有限公司
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