A three-dimensional electrochemical reactor in situ generation of singlet oxygen for urine inactivation and simultaneous removal of ppcps

Abstract

The invention discloses a method for in-situ generation of singlet oxygen by a three-dimensional electrochemical reactor to inactivate urine and simultaneously remove drugs and personal care products (PPCPs). Specifically, 10 6 CFU mL ‑1 Escherichia coli bacteria and 10mg / L PPCPs urine water sample were added to the reactor, and then the electrolyte sodium sulfate was added to the three-dimensional reactor, and the urine water sample was electrochemically treated at room temperature and under the condition of an external DC electric field. The liquid water sample corresponds to adding 50mmol sodium sulfate; the third electrode of the reactor is activated carbon particles co-doped with nitrogen and phosphorus, the cathode is a modified graphite felt electrode, and the cathode is a graphite felt electrode. The distance between the cathode and the anode in the reactor is 3cm . The method of the invention is simple, by adding sodium sulfate to the urine water sample to be treated to form a three-dimensional electrochemical reactor to generate singlet oxygen in situ, the bacteria in the urine can be fully inactivated and the PPCPs can be synchronously and efficiently oxidized and degraded.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for inactivating urine and synchronously removing PPCPs by generating singlet oxygen in situ in a three-dimensional electrochemical reactor. Background technique [0002] Urine has complex components, unstable properties, and high concentrations of salts, nutrients (such as N, P, K) and organic matter. At the same time, there are a variety of trace pollutants and pathogenic microorganisms in urine, which are difficult to be effectively removed by traditional sewage treatment methods, and have significant potential risks to humans and the environment. The presence of pathogenic microorganisms and viruses will make urine an important way for the spread of diseases, so urine needs to be inactivated before discharge to prevent the spread of microorganisms that are concerned about infection with wastewater. There are many kinds of drugs and personal care...

AI Technical Summary

Problems solved by technology

However, due to the need to add H 2 o 2 , The input of oxidants such as PMS and PDS increases the cost of sewage treatment, and due to the introduction of metal ions by metal oxides, the water body is polluted twice

Images