首页|C/N对HN-AD菌藻颗粒污泥体系处理农村污水的影响

C/N对HN-AD菌藻颗粒污泥体系处理农村污水的影响

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通过在传统菌-藻共生好氧颗粒污泥体系(ABGS)中引入异养硝化-好氧反硝化(HN-AD)菌构建H-ABGS体系,以合成农村污水为研究对象,考察碳氮比(C/N=1,2,4,6,8,10)对 H-ABGS 系统中污染物去除性能和微生物特性影响.结果表明,C/N 为 4 时,H-ABGS 系统的总氮去除率高于 ABGS 系统(12.05%)和好氧颗粒污泥(AGS)系统(44.86%).微生物群落分析显示,适应低碳环境的Thauera菌属和脱氨关键菌属norank_f__A4b可能是确保H-ABGS系统在低碳环境下具备高脱氮性能的关键.微生物群落的共生模式和相关性分析表明,引入 HN-AD 菌有助于最小化生态位,与藻共同形成稳定的共生体系,从而确保系统的稳定性.此外,C/N为4时,高表达的硝酸还原酶可能有助于确保H-ABGS系统在低碳环境下具备卓越的脱氮性能.
Effects of C/N on the treatment of rural wastewater by HN-AD bacterial-algal granular sludge system
The H-ABGS system was proposed by introducing heterotrophic nitrification-aerobic denitrification(HN-AD)bacteria into the traditional algal-bacterial aerobic granular sludge(ABGS)system.The effects of carbon to nitrogen(C/N)ratios(C/N=1,2,4,6,8,10)on the pollutant removal performance and microbial characteristics of the H-ABGS system for synthetic rural wastewater treatment were investigated.The results showed that the total nitrogen(TN)removal rate of the H-ABGS system was higher than that of the ABGS system(12.05%)and AGS system(44.86%)at a C/N ratio of 4.The microbial community analysis showed that Thauera bacteria and norank_f__A4b bacteria,which were adapted to the low carbon environment,might be the key to ensuring the high nitrogen removal performance of the H-ABGS system under low carbon condition.The symbiosis pattern and correlation analysis of microbial communities showed that the inoculation of HN-AD bacteria could help to minimize the ecological niche and form a stable symbiotic system with algae,thus ensuring the stability of the system.In addition,the high expression of nitrate reductase at a C/N ratio of 4might help to ensure the excellent nitrogen removal performance of the H-ABGS system.

algae-bacteria symbiosisheterotrophic nitrification-aerobic denitrification(HN-AD)bacteriamicrobial communitynitrogen removal

刘欢、杨晨曦、秦树敏、龙昆、赵婷婷、张千

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重庆理工大学化学化工学院,重庆 400054

菌藻共生 HN-AD菌 微生物群落 脱氮

重庆市科技创新与应用示范项目重庆市教育委员会科技研究计划项目重庆市巴南区项目重庆市自然科学基金项目重庆理工大学研究生教育高质量发展项目重庆理工大学研究与创新团队培育计划项目

cstc2018jscxmszdX0005KJQN2020011142020QC368CSTB2023NSCQ-MSX0412gzltd2023042023TDZ009

2024

中国环境科学
中国环境科学学会

中国环境科学

CSTPCDCHSSCD北大核心
影响因子：2.174
ISSN：1000-6923
年,卷(期)：2024.44(3)
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