An electrochemical activated carbon fiber felt-membrane reactor suitable for the removal of refractory organic matter in water

Abstract

The invention relates to an electrochemical activated carbon fiber felt film reactor suitable for removing refractory organic matter in water, the titanium mesh cathode is embedded in a PVC film support, ACFF / SnO 2 ‑Ta is used as the anode and filter membrane at the same time, and the electrochemical microfiltration membrane module is placed in the reactor. The reactor is applied with an external electric field by a regulated DC power supply to generate oxidant species with strong oxidizing properties in situ. In the continuous flow mode, the convective mass transfer between the bulk solution and the anode interface is promoted through the pumping of the effluent peristaltic pump, and the electrons at the anode interface are accelerated. The transfer reaction increases the output of oxidants and increases the contact probability between organic pollutants in water and the generated oxidants. The present invention can filter and remove particles, colloids and macromolecular pollutants in water through the size exclusion effect of membrane pores, because of its high specific surface area, It can provide a large number of adsorption sites for small molecule organic pollutants in water; doping Ta elements significantly improves the SnO 2 The electrocatalytic performance of H 2 O can form a large amount of adsorbed and dissociated •OH at the anode discharge, which plays an important role in the degradation of small molecular organic pollutants.

Description

technical field [0001] The invention belongs to the fields of environmental protection and water treatment, and in particular relates to an electrochemical activated carbon fiber felt film reactor suitable for removing refractory organic matter in water. Background technique [0002] In the past few decades, low-pressure membrane filtration (such as microfiltration and ultrafiltration) has become the mainstream technology in the field of drinking water treatment and sewage reuse, which can intercept colloidal substances and pathogenic bacteria. However, traditional low-pressure membranes also have certain technical defects in practical applications. For example, some synthetic low-molecular-weight pollutants (for example, toxic and / or refractory organic micropollutants < 1000 Da) cannot be intercepted, and may Deposition in the membrane pores leads to a decrease in the membrane flux or passes through the membrane pores and enters the receiving water body. Current conven...

AI Technical Summary

Problems solved by technology

However, traditional low-pressure membranes also have certain technical defects in practical applications. For example, some synthetic low-molecular-weight pollutants (for example, toxic and / or refractory organic micro-pollutants < 1000 Da) cannot be intercepted, and may Deposition in the membrane pores leads to a decrease in the membrane flux or passes through the membrane pores and enters the receiving water body

Current conventional wastewater treatment facilities are not designed for the removal of micro-pollutants which, due to their continuous release and persistence, may accumulate in water bodies and pose serious environmental risks

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