Electrochemical activated carbon fiber felt reactor applicable to removal of refractory organic matters in water

Abstract

The invention relates to an electrochemical activated carbon fiber felt reactor applicable to removal of refractory organic matters in water. A titanium mesh cathode is embedded into a PVC membrane bracket, ACFF / SnO2-Ta serves as an anode and a filter membrane at the same time, and an electrochemical microfiltration membrane assembly is placed in a reactor. The reactor is applied with an externalelectric field by a regulated DC power supply, and an oxidant variety with a relatively strong oxidizing property is produced in situ; in a continuous flow mode, convective mass transfer of a bulk solution and an anode interface is promoted by pumping of a peristaltic water outlet pump, so that an electron transfer reaction at the anode interface is accelerated, the yield of the oxidant is increased, and the probability of contact between organic pollutants in water and the produced oxidant is increased; particles, colloids and macromolecular pollutants in water can be filtered out through a dimensional exclusion effect of membrane pores, and because of relatively high specific surface area thereof, the electrochemical activated carbon fiber felt reactor can provide a large number of adsorption sites for small molecular organic pollutants in water; through doping of a Ta element, the electrocatalytic performance of SnO2 is significantly improved; H2O can form a large number of adsorbedand dissociated -OH through discharge at an anode, so that an important role is played in degradation of the small molecular organic pollutants.

Description

Technical field [0001] The invention belongs to the fields of environmental protection and water treatment, and specifically relates to an electrochemical activated carbon fiber felt membrane reactor suitable for the removal of 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. It can intercept colloidal substances and colloidal substances in water through the size exclusion effect of membrane pores. Pathogenic bacteria. However, traditional low-pressure filter membranes also have certain technical defects in practical applications, such as some synthetic low molecular weight pollutants (for example, Poisonous and / or refractory organic micropollutants <1000 Da) cannot be intercepted, and may deposit in the membrane pores and cause the membrane flux to decrease or pe...

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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