钠盐、锌离子和环丙沙星对厌氧产甲烷的影响

李澳新; 韩咏辰; 李治波; 闫晨浩; 王晓昌; 李玉友; 陈荣; 邢保山

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (7) : 3814-3822.

固体废物

钠盐、锌离子和环丙沙星对厌氧产甲烷的影响

李澳新¹, 韩咏辰², 李治波¹, 闫晨浩¹, 王晓昌¹, 李玉友³, 陈荣¹, 邢保山^1,3

作者信息 +

Effects of sodium salt, zinc ions and ciprofloxacin on anaerobic methanogenesis process.

LI Ao-xin¹, HAN Yong-chen², LI Zhi-bo¹, YAN Chen-hao¹, WANG Xiao-chang¹, LI Yu-you³, CHEN Rong¹, XING Bao-shan^1,3

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文章历史 +

摘要

针对高负荷餐厨垃圾和剩余污泥共消化系统在实际应用过程中存在的钠盐、重金属和抗生素联合抑制问题,通过系列批次试验探究不同浓度钠盐(1~16g Na⁺/L)、锌离子(180~900mg Zn²⁺/L)和环丙沙星(5~60mg CIP/L)对高负荷餐厨垃圾和剩余污泥共消化系统新鲜污泥和室温贮存污泥的单一和联合抑制作用.单因子实验结果表明:3种抑制物对厌氧共消化产甲烷效能的抑制强度依次为CIP＞Zn²⁺＞Na⁺.联合抑制试验结果表明:高浓度Na⁺、Zn²⁺和CIP对高负荷厌氧共消化新鲜排泥的联合抑制率高达97.8%,对室温贮存的高负荷厌氧共消化污泥联合抑制率降至74.4%~92.2%.这可能是室温贮存后高负荷厌氧共消化污泥通过形成胞外聚合物提高了污泥对抑制物的耐受阈值;同时室温贮存改变了Na⁺、Zn²⁺和CIP3种抑制物的联合互作模式.高通量菌群测序结果表明:室温贮存后污泥中相对丰度变化较小的Methanosarcina菌属(96.0%)以及相对丰度增加的Firmicutes (31%~54.1%)显著增强了高负荷厌氧共消化系统对3种抑制因子的联合抑制阈值,为多种抑制物共存时实际高负荷厌氧共消化系统的稳定调控提供了更优的强化途径.

Abstract

In response to the combined inhibition effects of sodium salt, heavy metals and antibiotics in the practical application of high-load anaerobic co-digestion (AcoD) of food waste (FW) and waste activates sludge (WAS), a series of batch experiments were conducted to investigate the individual and combined inhibitory effects of sodium salt (1~16g Na⁺/L), zinc ion (180~900mg Zn²⁺/L) and ciprofloxacin (5~60mg CIP/L) on the freshly discharged sludge and room temperature stored sludge from the high-load AcoD system. The results of single inhibition batch experiments indicated that the inhibition strengths of the three inhibitors on methanogenic efficiency were in the following order: CIP ＞ Zn²⁺ ＞ Na⁺. Furthermore, the results of the combined inhibition tests showed that the combined inhibition rate of high concentrations of Na⁺, Zn²⁺ and CIP was as high as 97.8% for the freshly discharged sludge. However, the combined inhibition rates were reduced to 74.4%~92.2% for the stored sludge under the room temperature. The reasons for the differences between the fresh sludge and storage sludge suffering three inhibitors may be due to the formation of more extracellular polymers for the stored sludge under room temperature. Meanwhile, the room temperature storage condition also changed the interaction patterns of the three inhibitors. The results of high-throughput microbial sequencing showed that Methanosarcina spp. with a small change in relative abundance (96.0%) and Firmicutes with an increase in relative abundance (31%~54.1%) in the sludge after room-temperature storage significantly enhanced the combined inhibitory thresholds of the three inhibitors, providing a better way to enhance the stability regulation of high-load AcoD in the coexistence of multiple inhibitors.

导出引用

李澳新, 韩咏辰, 李治波, 闫晨浩, 王晓昌, 李玉友, 陈荣, 邢保山. 钠盐、锌离子和环丙沙星对厌氧产甲烷的影响[J]. 中国环境科学. 2025, 45(7): 3814-3822

LI Ao-xin, HAN Yong-chen, LI Zhi-bo, YAN Chen-hao, WANG Xiao-chang, LI Yu-you, CHEN Rong, XING Bao-shan. Effects of sodium salt, zinc ions and ciprofloxacin on anaerobic methanogenesis process.[J]. China Environmental Science. 2025, 45(7): 3814-3822

中图分类号： X705

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