A method for multi-stage phosphorus removal and production of phosphine from phosphorus-containing organic wastewater

Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a multi-stage phosphor removing and hydrogen phosphide production method of phosphor-containing organic wastewater. The method comprises the following steps: preparing an anaerobic reactor, a microbial fuel cell, and a microbial electrolytic bath, connecting the anaerobic reactor, microbial fuel cell, and microbial electrolytic bath in sequence, wherein the external circuit of the microbial fuel cell is provided with a battery, and the battery provides stable power to the microbial electrolytic bath through a voltage stabilizing device; introducing phosphor-containing wastewater into the anaerobic reactor to carry out a anaerobic treatment, then introducing the wastewater into the anode chamber of the microbial fuel cell to trigger reactions to produce electric energy, then introducing the wastewater into the cathode chamber and anode chamber of the microbial electrolytic bath from the water outlet of the microbial fuel cell, and carrying out reactions under a voltage of 3.2 V, wherein during the reaction process, the phosphate, protons, and electronics in wastewater carry out reactions to generate hydrogen phosphide. The provided method improve the phosphor removing efficiency, moreover, the purify of the produced hydrogen phosphide is high, the economic value of the system is increased, the fuel cell is used to provide electric energy to the electrolytic bath, the energy consumption is saved, and thus the high efficiency and environment protection are achieved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a method for phosphorus-containing organic wastewater to remove phosphorus and produce phosphine, in particular to an anaerobic biological treatment combined with microbial electrolytic cells to treat organic wastewater and realize multi-stage phosphorus removal and phosphorus production Hydrogen method. Background technique [0002] Phosphine (PH 3 ) is an important reduced form of phosphorus in the natural environment, and this view has been generally accepted. Since Devai et al first detected the presence of phosphine in the volatiles of sewage plants in 1988, more and more researchers have participated in the research of phosphine related fields. At present, the problem of global water eutrophication is serious. Phosphorus is one of the main limiting substances of water eutrophication. Trying to efficiently remove phosphorus in sewage and recycle it to avoid seco...

AI Technical Summary

Problems solved by technology

However, although the continuous production of phosphine in these reactors has been observed, the microbial production mechanism of phosphine is still unclear, so it is difficult to quantitatively determine the conversion efficiency of total phosphorus in water into phosphine, making continuous research difficult to proceed

And the use of microbial anaerobic phosphorus removal to produce phosphine, the yield of phosphine is also relatively low

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