葡萄籽纳米铁介导微氧污泥床生物脱氮性能研究
Study on biological denitrification performance of microaerobic sludge bed mediated by grape seed nanoscale iron
李文博 1张潇 1赵博玮 1崔颖 1岳秀萍1
作者信息
- 1. 太原理工大学环境科学与工程学院,山西 太原 030024
- 折叠
摘要
针对微氧活性污泥技术面临的启动周期长、氮去除效率低等问题,通过投加采用葡萄籽提取物为原材料制备的纳米铁(Grape Seed-nano iron,GS-nFe)构建了 GS-nFe介导的微氧活性污泥新体系,从而实现了运行效能的提高.研究结果表明,GS-nFe的单个粒径范围在50～300 nm;反应器在投加GS-nFe后,平均出水NH+4-N、TIN和COD去除率分别维持在89.48％、76.24％和79.39％,GS-nFe的投加使得厌氧氨氧化菌属的相对丰度由1.98％增至2.87％.此外,norank_f_norank_o_C10-SB1A的相对丰度占比由1.59％增至3.02％,其可与好氧反硝化菌、铁自养反硝化菌、厌氧氨氧化等菌属共同协作,提高生物脱氮效能.
Abstract
To address the issues associated with microaerobic activated sludge technology,such as long start-up period and low nitrogen removal efficiency,a novel microaerobic activated sludge system mediated by grape seed-nano iron(GS-nFe)is established through adding nano iron with grape seed extracts as raw materials,thereby achieving an enhanced operational efficiency.The findings reveal that single particle size of GS-nFe ranges from 50 nm to 300 nm.After adding GS-nFe into the reactor,the average removal efficiencies of NH4-N,TIN,and COD in the effluent maintain at 89.48％,76.24％,and 79.39％,respectively.The addition of GS-nFe makes the relative abundance of anammox bacteria rise from 1.98％to 2.87％.Furthermore,the relative abundance proportion of norank__f_norank_o_C10-SB1A increases from 1.59％to 3.02％.This bacterium,in conjunction with aerobic denitrifying bacteria,iron-oxidizing denitrifying bacteria,and anammox bacteria,collaboratively contributes to the enhancement of biological nitrogen removal efficiency.
关键词
城市污水/微氧/生物脱氮/GS-nFe/自养反硝化菌Key words
urban sewage/microaerobic/biological denitrification/GS-nFe/autotrophic denitrifying bacteria引用本文复制引用
基金项目
山西省应用基础研究计划(20210302124479)
中国博士后科学基金资助项目(2023M732570)
国家自然科学基金(52270134)
中央引导地方科技发展资金项目(YDZJSX2022A008)
出版年
2024
NETL
NSTL
万方数据