Tandem continuous-flow microbial fuel cell system and preparation method thereof, and application of tandem continuous-flow microbial fuel cell system in degradation of nitrobenzene wastewater

Abstract

The invention belongs to the technical field of environment-friendly water treatment and biological fuel cells, and provides a tandem continuous-flow microbial fuel cell system and a preparation method thereof, and application of the tandem continuous-flow microbial fuel cell system in degradation of nitrobenzene wastewater in order to improve the limitation of the nitrobenzene degradation rate of a single microbial fuel cell and improve the mineralization degree and the power generation capacity of organic matters. The system is composed of two double-chamber microbial fuel cells MFC1 and MFC2, wherein anodes of the MFC1 and the MFC2 are separately stood, and cathodes of the MFC1 and the MFC2 are connected in series; anode chambers and cathode chambers are separated through an ion exchange membrane, and electrodes in the anode chambers and the cathode chambers of the MFC1 and the MFC2 are Fe@Fe2O3/PANI/PEG modified carbon felts; saturated calomel electrodes are arranged in the cathode chambers as reference electrodes; and the anodes and the cathodes are connected with a 1000-ohm external resistor through copper wires to form a complete circuit loop, and the external resistor is connected with a voltage collector in parallel. The mass transfer property and the treatment capacity of electron transfer and the system are improved, and performance and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection water treatment and biological fuel cells, and specifically relates to a serial continuous flow microbial fuel cell system and its preparation method and its application in degrading nitrobenzene wastewater. The microbial fuel cell cathode-cathode series continuous flow mode Degradation of nitrobenzene and electricity generation, using the first modified battery Fe@Fe 2 o 3 / PANI / PEG / CF and biocathode to improve the removal rate of nitrobenzene and the production capacity. Background technique [0002] As a common toxic pollutant discharged by chemical enterprises, nitrobenzene is an important class of chemical raw materials, mostly used as raw materials for explosives, pesticides and rubber vulcanization accelerators. Due to its high toxicity, great harm to the ecological environment and very stable chemical properties, it is difficult to biochemically degrade, and its effectiv...

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Problems solved by technology

Due to its high toxicity, great harm to the ecological environment and very stable chemical properties, it is difficult to biochemically degrade, and its effective removal from wastewater has always been a research topic. At present, the methods commonly used to degrade nitrobenzene (NB) generally include physical methods. , chemical method, biological method and combined treatment method, etc., but these methods have their own shortcomings and problems. For example, the solvent regeneration in the physical method is difficult and the treatment cycle is long, and even secondary pollution will occur. The chemical method has high costs and degradation. Defects such as incomplete nitrobenzene

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