Continual immersion type processing unit of photocatalysis membrane for removing natural organic matter in water

Abstract

The present invention discloses a continuously-submerged photocatalytic membrane treatment equipment capable of removing natural organics from water, beloning to the field of micropollutant water and drinking water treatment technology. Said equipment includes the following components: fiber bundle filter device, reactor integrated photocatalysis and submerged microporous filtration into one body, air compressor and suction pump. Said invention also provides the concrete structure of the above-mentioned every component, and the photocatalyst in the reactor is granular nano TiO2.

Description

technical field [0001] The invention belongs to the technical field of micro-polluted water body and drinking water treatment, and in particular relates to the design of a continuous submerged photocatalytic membrane water treatment device. Background technique [0002] Humus is a representative substance of natural organic matter (NOM) in water bodies, and it is the most widely distributed natural complex compound on the earth. Humic substances are generally divided into three parts: humic acid, fulvic acid, and Jima Duomeilang acid. Due to the ubiquitous and widespread existence of natural organic matter in water, it has an important impact on water quality and water treatment process, especially during chlorination disinfection, natural organic matter is the main precursor of disinfection by-products (DBPs), therefore, the control of chlorination disinfection By-products have become an important issue of concern to the water supply industry in various countries in the wo...

AI Technical Summary

Problems solved by technology

At present, there are two main problems affecting the practical application of photocatalytic technology: one is the separation of catalyst and water, and the other is the improvement of photocatalytic reaction efficiency.

[0004] In the patents applied for in the past, the effective combination of membrane filtration separation technology and photocatalytic oxidation technology is often used, so as to realize the problem of effective separation of catalyst from water and recycling in the reactor, so that the water treatment process can run continuously, but there are also the following disadvantages: Since the photocatalyst used is in a powder state, there will be attachments on the surface of the lamp wall of the ultraviolet lamp during long-term operation, the light projection efficiency will be greatly reduced, and the catalyst will easily aggregate in water and lose its activity, making it difficult to recycle; in addition, the powder The state catalyst is easy to deposit on the surface of the membrane, resulting in clogging of the membrane pores, serious membrane fouling, and a rapid decline in the membrane flux, resulting in a shortened membrane cleaning cycle, which limits the continuous operation of the photocatalytic membrane reaction system.

In addition, if the water body contains iron, it will adhere to the outer wall of the quartz sleeve during the photocatalytic reaction and seriously affect the light transmission performance.

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