首页|硫化物对厌氧氨氧化耦合自养脱硫反硝化工艺脱氮除硫效能的影响

硫化物对厌氧氨氧化耦合自养脱硫反硝化工艺脱氮除硫效能的影响

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以成熟Anammox颗粒污泥与产甲烷颗粒污泥作为接种物实现了硫自养反硝化耦合厌氧氨氧化(SADA)工艺快速启动,探究了不同硫化物负荷对SADA工艺脱氮效能的影响及其脱硫机理.结果表明:较高硫化物负荷(>1.50g S/(L·d))对耦合系统中AnAOB无显著抑制作用,相应的系统脱氮效率连续运行1.5个月后趋于稳定.当将硫化物浓度降为零,耦合系统的总氮去除率(TNRE)仍能达到88.1%,相应的化学计量比Rs(1.23±0.13)与Rp(0.33±0.08)亦与Anammox理论值近似,表明解除高硫化物负荷胁迫条件后SADA系统中Anammox颗粒污泥仍能实现生物脱氮过程.当解除高硫化物负荷胁迫 1.5个月后,在较低硫化物负荷条件下(0.30g S/(L·d))恢复硫化物胁迫,耦合系统出水NO3-降低,相应的Rp降至 0.21,表明SADA系统仍能较好地实现同步脱氮除硫,兼具硫自养反硝化和厌氧氨氧化的双重功效.系统存在的产甲烷颗粒污泥降低硫化物对AnAOB抑制,缩短了SADA工艺启动时间,且能在重新引入硫化物后快速激活脱硫反硝化过程.通过颗粒污泥形态分析和高通量测序菌群解析可知:不同硫化物胁迫条件下,SADA 系统中仍能实现AnAOB(如Candidatus Kuenenia,16.9%)和硫氧化菌(如Thiobacillus,31.6%)的共存富集,且能实现高硫化物负荷条件下较高的TNRE(>60%)和硫单质产率(95.2%).
Influence of sulfide on the desulfurization-denitrification performance of the sulfide-driven autotrophic denitrification and anaerobic ammonia oxidation process
In this study,mature anammox granular sludge and methanogenic granular sludge were used as inoculum to achieve rapid start-up of the sulfide-driven autotrophic denitrification and anammox(SADA)process.The effects of different sulfide loading on nitrogen removal of the SADA process and its desulfurization mechanism were investigated.Results showed that high sulfide loads(>1.50g S/(L·d))had no significant inhibitory effect on Anammox bacteria(AnAOB),and the corresponding nitrogen removal efficiency stabilized after 1.5 months of continuous operation.When the sulfide concentration was reduced to zero,the total nitrogen removal efficiency(TNRE)still reached 88.1%,and the stoichiometric ratios of Rs(1.23±0.13)and Rp(0.33±0.08)were similar to the theoretical values of Anammox reaction,indicating that the AnAOB was capable of performing nitrogen removal after removing the high sulfide loading conditions.When the high sulfide loading stress was relieved for 1.5months and was replaced by lower sulfide loading(0.30g S/(L·d)),the effluent showed a decrease in NO3-with the Rp of 0.21,indicating that the SADA system achieved simultaneous nitrogen and sulfur removal.The presence of methanogenic granular sludge reduced the inhibition of AnAOB caused by the sulfide,which shortened the start-up time of the SADA process.Meanwhile,the coupling system can activate the desulphurization-denitrification process quickly after reintroducing sulfide.Morphological analysis and high-throughput sequencing technique showed that in the SADA system AnAOB(e.g.,Candidatus Kuenenia,16.9%)and sulfur-oxidizing bacteria(e.g.,Thiobacillus,31.6%)were enriched under different sulfide stresses,contributing to high total nitrogen removal(>60%)and sulfur production(95.2%)under high sulfide loading.

sulfideanaerobic ammonia oxidation(Anammox)sulfide-driven autotrophic denitrificationcoupled processmethanogenic granular sludgedenitrification and desulfurization

王雅歌、唐喜芳、刘佳怡、付钰琳、郭琼、陈荣、金仁村、邢保山

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西安建筑科技大学环境与市政工程学院,西北水资源与环境生态教育部重点实验室,国家城市非传统水资源开发利用国际科技合作基地,陕西省污水处理与资源化工程技术研究中心,陕西省环境工程重点实验室,陕西 西安 710055

杭州师范大学生命与环境科学学院,浙江 杭州 311121

硫化物 厌氧氨氧化 硫自养反硝化 耦合工艺 产甲烷颗粒污泥 脱氮除硫

陕西省杰出青年科学基金项目国家自然科学基金资助项目

2022JC-03152100162

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(9)