MnO2促进厌氧氨氧化工艺启动的试验研究
Experimental study on MnO2 promoting start-up of ANAMMOX process
耿诗雯 1李军 1李光蕾 1李俊鹏1
作者信息
- 1. 沈阳建筑大学市政与环境工程学院,沈阳 110168
- 折叠
摘要
为了考察投加MnO2对ANAMMOX工艺启动效果和脱氮性能的促进作用,通过改变水力负荷以及采用逐级驯化手段,向反应器中投加MnO2(0～50 mg/L),逐步提高厌氧氨氧化污泥对MnO2耐受性,运行90 d成功启动ANAMMOX反应器.反应器对NH4+-N、NO2--N去除率分别稳定在78％、98％,NLR可提升至0.855 kg/(m3·d),NRR稳定在0.718 kg/(m3·d)左右,NO2--N与NH4+-N物质的量比以及NO3--N与NH4+-N物质的量比分别稳定在1.32和0.20,SAA数值最大为269.86 mg[N]/(g[VSS]·d),利用高通量测序技术进行微生物群落结构分析,AnAOB属占比8.92％,成为优势菌属.相较于传统ANAMMOX工艺,投加MnO2可促进AnAOB的富集、强化AnAOB的活性,为ANAMMOX工艺广泛应用于实际工程提供参考.
Abstract
In order to investigate the promotional effect of MnO2 addition on start-up effect and denitrification performance of ANAMMOX process,by changing hydraulic load and adopting step-by-step domestication means to add MnO2(0-50 mg/L)to the reactor,the tolerance of anaerobic ammonia oxidation sludge to MnO2 was gradually improved and the ANAMMOX reactor was successfully started-up for 90 d of operation.The removal rates of NH4+-N and NO2-N were stabilized at 78％and 98％respectively,the NLR was enhanced to 0.855 kg/(m3·d),the NRR was stabilized at about 0.718 kg/(m3·d),and the mass ratios of NO2--N to NH4+-N and NO3--N to NH4+-N were stabilized at 1.32 and 0.20 respectively,and the maximum value of SAA was 269.86 mg[N]/(g[VSS]·d),and the microbial community structure analysis using high-throughput sequencing technology showed that the genus AnAOB accounted for 8.92％,and became the dominant genus.Compared to the traditional ANAMMOX process,the addition of MnO2 can promote the enrichment of AnAOB and strengthen the activity of AnAOB,which can provide a reference for the wide application of ANAMMOX process in practice.
关键词
MnO2/厌氧氨氧化/生物脱氮/UASB反应器/微生物群落结构/AnAOB活性Key words
MnO2/ANAMMOX/biological nitrogen removal/UASB reactor/microbial community structure/AnAOB activity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据