厌氧条件下微生物将磷还原为磷化氢

Conversion of phosphorus to phosphine by microbial deoxidization under anaerobic conditions

摘要:

【目的】磷化氢为磷的气态形式，将污水中磷通过转化为磷化氢的方式去除，为污水除磷提供新思路。【方法】采用厌氧持续培养的方式，以经过磷化氢处理和没有处理的水稻土分别作为接种物，在氧化还原电位(ORP)≤?300 mV、恒温35 °C，避光持续培养160 d。【结果】培养器1出水总磷的去除率稳定达到25%，最高去除率为26.78%，气体磷化氢的产量达到130 ng/L以上。培养器2出水总磷去除达到23%，气体磷化氢的产量达到126 ng/L。【结论】对水稻土进行厌氧条件下连续培养，可以形成稳定的厌氧产磷化氢微生物体系，提高磷化氢的释放量。

Abstract:

[Objective] Conversion of phosphorus to phosphine, a gaseous form of phosphorus, has the potential to remove phosphorus from wastewater. [Methods] Incubator was kept anaerobically for 160 days, with paddy soil as inoculum that was treated either with phosphine without phosphine, under the condition ORP≤?300 mV, 35 °C and in dark. [Results] In incubator 1, total phosphorus removal in the effluent reached 25%, with the highest rate of 26.8%, and the gas phosphine output was above130 ng/L; and in incubator 2, total phosphorus removal in the effluent reached 23% with gas phosphine output of 126 ng/L. [Conclusion] Microorganisms from paddy soil can form a stable system to produce phosphine from phosphorus under anaerobic conditions to remove phosphorus contamination in soils.