Alga type hollow fiber ultrafiltration membrane filter device

Abstract

The invention relates to an algae type hollow fiber ultrafiltration membrane filter device. Hollow fibers which are prior fixed on two ends are fixed on one end so as to form an algae floating type structure. A reticular support is adopted for the internal structure of a hollow fiber membrane silk, namely, a reticular support layer is added below a membrane silk separation layer of the hollow fiber ultrafiltration membrane. The algae type hollow fiber ultrafiltration membrane filter device is used for efficiently removing suspended matters, organic matters, colloids, microbes, and the like in water. The algae type hollow fiber ultrafiltration membrane filter device belongs to the technical field of membrane separation water treatment. The device is integrated with an activated sludge method to form a membrane bioreactor MBR without strict pretreatment. Therefore, the device can be applied to sewage treatment projects.

Description

technical field [0001] The invention relates to a novel membrane separation technology and device for efficiently removing suspended matter, organic matter, colloidal silicon, microorganisms, etc. in feed water or waste water, and relates to the technical field of membrane separation water treatment. Background technique [0002] At present, there are mainly the following types of hollow fiber ultrafiltration membranes at home and abroad: internal pressure type, pressurized external pressure type, negative pressure external pressure type, etc. These forms have been widely used in water treatment systems in various industries. Due to the forms of these membrane structures, the use is limited to a certain extent. The internal pressure hollow fiber ultrafiltration membrane has high requirements on the quality of the influent water, so when it is applied to the water treatment system, it is usually necessary to consider the pretreatment process of clarification + filtration, res...

AI Technical Summary

Problems solved by technology

These forms have been widely used in water treatment systems in various industries. Due to the forms of these membrane structures, the use is limited to a certain extent.

The internal pressure hollow fiber ultrafiltration membrane has high requirements on the quality of the influent water, so when it is applied to the water treatment system, it is usually necessary to consider the pretreatment process of clarification + filtration, resulting in increased investment in the project, frequent cleaning cycles, and high operating costs

Pressurized external pressure hollow fiber ultrafiltration membrane, most of the materials currently used in the field of water treatment are polyvinylidene fluoride (PVDF), which has good flexibility and oxidation resistance. Compared with the internal pressure Although the pretreatment is not as high as the internal pressure hollow fiber ultrafiltration membrane, it still requires a certain pretreatment process and has the defect of poor alkali resistance

Negative pressure external pressure hollow fiber ultrafiltration membrane, the whole membrane device is submerged in the pool, suitable for waste water treatment, no strict pretreatment is required, usually only need to set a grille on the water inlet side to intercept incoming water Large suspended solids; however, since the current negative pressure and external pressure hollow fiber ultrafiltration membranes usually fix the two ends of the hollow fiber, in the case of bad incoming water, there are pollutants that are easy to deposit on the two ends of the hollow fiber. end, the membrane separation layer is easy to fall off, the hollow fiber is easy to break, and there are still defects such as fouling after chemical cleaning

[0003] Due to the deficiencies mentioned above in the above three forms of hollow fiber ultrafiltration membranes, hollow fiber ultrafiltration membranes are subject to certain limitations in the field of water treatment, especially in waste water treatment projects.