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Method for treating brackish-water lake water with combined processes of ultrafiltration membrane and membrane capacitance deion

A membrane capacitor deionization and combined process technology, which is applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc. , the effect of improving desalination efficiency

Inactive Publication Date: 2017-06-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, anionic surfactants, oils, colloidal substances, humate, natural organic matter, anionic polyacrylamide, anionic dyes, proteins, peptides, bacteria, algae, etc. can easily cause serious pollution of ion exchange membranes.

Method used

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  • Method for treating brackish-water lake water with combined processes of ultrafiltration membrane and membrane capacitance deion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a method for treating brackish lake reservoir water using ultrafiltration membrane and membrane capacitive deionization combined process includes the following steps:

[0027] Step 1: The influent water adopts self-dispensing water, the main water quality index is TOC = 6-8 mg / L, the main organic component is humic acid, the inorganic component is sodium chloride, and the conductivity is 13-14 mS / cm. The water temperature is 20°C, and it is filtered through an ultrafiltration membrane module. The ultrafiltration membrane module adopts a polyethersulfone hollow fiber membrane with an outer diameter of 1.5mm and an inner diameter of 0.8mm. The phytic acid and alginate organic matter are intercepted by the ultrafiltration membrane, the molecular weight cut-off is 67kDa, and the effective area of ​​the membrane filament is 5 m 2 .

[0028] The second step: the effluent filtered by the ultrafiltration membrane module passes through the membrane c...

Embodiment 2

[0032] Such as figure 1 As shown, a method for treating brackish lake reservoir water using ultrafiltration membrane and membrane capacitive deionization combined process includes the following steps:

[0033] Step 1: The influent water adopts self-dispensing water, the main water quality index is TOC = 4-5 mg / L, the main organic component is sodium alginate, the inorganic component is sodium chloride, and the conductivity is 13-14 mS / cm. The water temperature is 20°C, and it is filtered through an ultrafiltration membrane module. The ultrafiltration membrane module is composed of two layers of polyvinylidene fluoride hollow fiber membranes, and is filtered by external pressure. 1.5mm, inner diameter 0.8mm, membrane separation pore size 0.1 μm, effective area of ​​membrane filament 1 m 2 , the operating pressure is 0.01-0.05 MPa, the outer diameter of the second layer of polyvinylidene fluoride hollow fiber membrane is 1.5mm, the inner diameter is 0.8mm, the water inlet press...

Embodiment 3

[0038] Such as figure 1 As shown, a method for treating brackish lake reservoir water using ultrafiltration membrane and membrane capacitive deionization combined process includes the following steps:

[0039] Step 1: The influent water adopts self-dispensing water, the main water quality index is TOC = 8-11 mg / L, the main organic components are humic acid and sodium alginate, the inorganic component is sodium chloride, and the conductivity is 16-17 mS / cm, the water temperature is 20°C, filtered through the ultrafiltration membrane module, the ultrafiltration membrane module is composed of polyvinylidene fluoride hollow fiber membrane microfiltration membrane and polyethersulfone hollow fiber membrane ultrafiltration membrane, the polyvinylidene fluoride Ethylene hollow fiber membrane, the outer diameter of the membrane filament is 1.5mm, the inner diameter is 0.8mm, the separation aperture of the membrane is 0.1 μm, and the effective area of ​​the membrane filament is 1 m 2 ...

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Abstract

The invention discloses a method for treating brackish-water lake water with combined processes of an ultrafiltration membrane and membrane capacitance deions. The method comprises the following steps: firstly, filtering brackish-water lake water by using an ultrafiltration membrane, retaining organic matters in the water by using the ultrafiltration membrane, and adsorbing cations and anions in the water by using a membrane capacitance deion component, thereby removing ions in the brackish-water lake water and desalting the brackish-water lake water. By virtue of the combination of the ultrafiltration membrane and the membrane capacitance deions, organic matters in water can be effectively prevented from being adhered to cation and anion ion exchange membranes and electrodes of capacitance deion devices, so that the desalting treatment effect of the membrane capacitance deion device; the method is simple to operate and has the advantages of being low in energy consumption, low in membrane pollution rate, simple to operate and the like, and pollutants in water can be effectively removed.

Description

technical field [0001] The invention relates to the technical field of water treatment, and in particular relates to a method for treating brackish lake reservoir water by using a combination process of ultrafiltration membrane and membrane capacitive deionization. Background technique [0002] When there is salinization in the surface soil, the groundwater in this area, and even the pits and ponds collected by the surface runoff, are mostly saline or brackish water. Most brackish lakes and reservoirs are injected by river water. During runoff, organic matter etc. will inevitably be brought into lakes and reservoirs. The main treatment methods for high-concentration saline wastewater include reverse osmosis, ion exchange, distillation, dilution, etc., and the treatment cost is relatively high. [0003] Membrane capacitor deionization technology is a water treatment technology with high efficiency and low energy consumption. It has a high removal efficiency for ions. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/444C02F1/4691C02F2103/007
Inventor 陈琳朱亮刘宇鹏张丹枫郭雅丽王成燚
Owner HOHAI UNIV
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