污泥生物炭对低C/N废水好氧颗粒污泥长期运行稳定性的影响

李军; 魏鑫; 邓永春; 段文焱; 陈芳媛

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中国环境科学 ›› 2024, Vol. 44 ›› Issue (4) : 2032-2043.

水污染与控制

污泥生物炭对低C/N废水好氧颗粒污泥长期运行稳定性的影响

李军, 魏鑫, 邓永春, 段文焱, 陈芳媛

作者信息 +

Effects of sludge biochar on the long-term stability of aerobic granular sludge in low C/N wastewater

LI Jun, WEI Xin, DENG Yong-chun, DUAN Wen-yan, CHEN Fang-yuan

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文章历史 +

摘要

将污泥生物炭作为载体培养好氧颗粒污泥,研究培养成熟的好氧颗粒污泥在碳氮比(C/N)由10降为4条件下的长期运行稳定性.结果表明,通过添加生物炭培养成熟的好氧颗粒污泥颗粒结构更紧密,不易解体.虽然丝状菌Thiothrix大量增殖,但是好氧颗粒沉淀性能良好,SVI₃₀始终维持在50mL/g左右;系统COD去除效率达到90%以上,TN去除率为70%左右.高通量测序分析表明,加炭系统微生物多样性有所降低,但具有反硝化功能的细菌数量增加,提升了系统脱氮性能.添加污泥生物炭培养成熟的好氧颗粒污泥具有更好的脱氮性能和长期运行稳定性,有利于低C/N条件下的高氨氮废水处理.

Abstract

Aerobic granular sludge technology is a promising biological method for wastewater treatment. Sludge biochar was used as a carrier to cultivate aerobic granular sludge, and the subsequent long-term operational stability of the mature aerobic granules was investigated under the condition of carbon to nitrogen ratio (C/N) from 10 to 4. The results showed that the mature aerobic granular sludge carried by biochar was more compact in structure and not easy to disintegrate. The aerobic granular sludge had good settling ability with SVI₃₀ of 50mL/g and performances with the removal efficiency of COD and TN more than 90% and around 70%, respectively, through the whole operation period, although they were suffered from strong proliferation of filamentous Thiothrix. High-throughput sequencing analysis showed that the aerobic granular sludge carried by the sludge biochar had lower microbial diversity, but they had higher dominance of denitrification functional genera, which enhanced their nitrogen removal performance. Overall, our study demonstrated that adding sludge biochar to cultivate aerobic granular sludge may improve nitrogen removal performance and the long-term operational stability of the system, which is favorable for the treatment of high ammonia-nitrogen wastewater under low C/N conditions.

导出引用

李军, 魏鑫, 邓永春, 段文焱, 陈芳媛. 污泥生物炭对低C/N废水好氧颗粒污泥长期运行稳定性的影响[J]. 中国环境科学. 2024, 44(4): 2032-2043

LI Jun, WEI Xin, DENG Yong-chun, DUAN Wen-yan, CHEN Fang-yuan. Effects of sludge biochar on the long-term stability of aerobic granular sludge in low C/N wastewater[J]. China Environmental Science. 2024, 44(4): 2032-2043

中图分类号： X703

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