刘树根^1,,
苏福家¹,
李婷¹,
宁平¹
1.昆明理工大学环境科学与工程学院，昆明 650500
基金项目: 国家自然科学基金资助项目（51868029）
云南省科技计划项目面上项目（2016FB093）

Purification of low concentration phosphine by bio-trickling filter system and analysis of microbial community

LIU Shugen^1,,
SU Fujia¹,
LI Ting¹,
NING Ping¹
1.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

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摘要:采用生物滴滤法净化低浓度磷化氢气体，探讨填料种类、进气量、氧浓度、进气磷化氢浓度等因素对净化过程的影响。复合填料能促进气态磷化氢的吸附，但微生物对磷化氢的净化起决定性作用。进气负荷高于300 mL·min-1 (空间速度为8.2 h-1)时，滴滤塔内磷化氢去除率下降明显；进气中氧含量不足时，生物氧化进程受到抑制，磷化氢净化效果变差。在进气流量200 mL·min-1、氧体积分数8.2%、磷化氢入口浓度20 mg·m-3条件下，磷化氢脱除率可高达76.8%，定期废弃的吸收液中总磷含量均低于1.0 mg·L-1。生物滴滤塔内具有较高的微生物种群多样性，细菌以变形菌门（Proteobacteria）最为丰富，主要的细菌种属有：鞘氨醇单胞菌（Sphingomonas）、甲醇杆菌（Methylobacterium）、嗜甲基菌（Methylophilus）及伯克氏菌（Burkholderia）。
关键词: 磷化氢/
生物净化/
滴滤塔/
复合填料/
微生物种群

Abstract:The bio-trickling filter system was adopted to treat gaseous phosphine (PH3) with low concentration, and the effects of technical parameters on the phosphine purification were investigated. The composite filler facilitated the phosphine adsorption, however the microorganisms played a decisive role for the PH3 purification. The inlet flow was higher than 300 mL·min-1（the corresponding space velocity was 8.2 h-1）, the PH3 removal in bio-trickling filter decreased significantly. As the oxygen content in the intake was not enough to meet the demands of biological oxidation, and the purification of PH3 kept a relatively lower value. Under a specified condition such as inlet flow 200 mL·min-1, oxygen content 8.2%, and PH3 concentration 20 mg·m-3, the PH3removal reached up to 76.8%. For the bio-trickling filter system, most of the bacteria belongings to the phylum of Proteobacteria, and the genus of Sphingomonas, Methylobacterium, Methylophilus and Burkholderia are the dominant bacteria. The bio-trickling filter maintained a relatively higher microbial population diversity than an activated sludge system, in favor of the stable operation of PH3 biopurification process.
Key words:phosphine/
biopurification/
bio-trickling filter/
composite filler/
microbial community.

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生物滴滤法净化低浓度磷化氢及其微生物群落分析

刘树根^1,,
苏福家¹,
李婷¹,
宁平¹
1.昆明理工大学环境科学与工程学院，昆明 650500
基金项目: 国家自然科学基金资助项目（51868029） 云南省科技计划项目面上项目（2016FB093）
关键词: 磷化氢/
生物净化/
滴滤塔/
复合填料/
微生物种群
摘要:采用生物滴滤法净化低浓度磷化氢气体，探讨填料种类、进气量、氧浓度、进气磷化氢浓度等因素对净化过程的影响。复合填料能促进气态磷化氢的吸附，但微生物对磷化氢的净化起决定性作用。进气负荷高于300 mL·min-1 (空间速度为8.2 h-1)时，滴滤塔内磷化氢去除率下降明显；进气中氧含量不足时，生物氧化进程受到抑制，磷化氢净化效果变差。在进气流量200 mL·min-1、氧体积分数8.2%、磷化氢入口浓度20 mg·m-3条件下，磷化氢脱除率可高达76.8%，定期废弃的吸收液中总磷含量均低于1.0 mg·L-1。生物滴滤塔内具有较高的微生物种群多样性，细菌以变形菌门（Proteobacteria）最为丰富，主要的细菌种属有：鞘氨醇单胞菌（Sphingomonas）、甲醇杆菌（Methylobacterium）、嗜甲基菌（Methylophilus）及伯克氏菌（Burkholderia）。

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