摘要
基于前置反硝化部分亚硝化耦合部分亚硝化(PN)/厌氧氨氧化(A)垃圾渗滤液中试处理系统,研究了系统无法正常运行时维持PN/A单元低负荷运行保持ANAMMOX微生物活性的可行性,并探究了系统性能恢复特征。结果表明,低负荷运行10 d后PN/A单元总无机氮去除负荷(TINRRPN/A)仍有0.227 kg·(m^(3)·d)^(-1),达到稳定运行阶段的43.3%,氨氮和总无机氮去除率都达到89.5%以上,说明低负荷运行可以有效缓解ANAMMOX污泥活性的衰减。采用逐步提高进水氨氮负荷结合控制DO的恢复策略,经过9 d系统性能得到完全恢复。TINRRPN/A恢复到0.513 kg·(m^(3)·d)^(-1),达到稳定运行阶段的97.7%。高通量测序结果表明,Ca_Anammoxoglobus菌属更能适应老龄垃圾渗滤液水质,其稳定运行阶段和恢复后的相对丰度分别为12.41%和11.19%。以上研究结果有望为厌氧氨氧化工艺的工程应用提供有益的技术指导。
Based on the combined process of pre-denitrification,partial nitritation and partial nitritation(PN)/ANAMMOX(A)for landfill leachate treatment at the pilot-scale,the feasibility of activity maintenance of anammox bacteria by low-load operation and the recovery characteristics of the process performance under the abnormal operation conditions were studied.The results showed that the total inorganic nitrogen removal rate of PN/A process(TINRRPN/A)remained at 0.227 kg·(m^(3)·d)^(-1)after 10 days of low-load operation of the PN/A reactor,and it reached 43.3%of the value at the stable operation stage,and the removal rates of ammonia nitrogen and total inorganic nitrogen were both above 89.5%.This indicated that the attenuation of the activity of ANAMMOX sludge could be effectively alleviated by low-load operation.Based on a recovery strategy combining stepwise increase of ammonia loading rate and DO control,the system performance could be completely restored after 9 days.The TINRRPN/A restored to 0.513 kg·(m^(3)·d)^(-1)and reached 97.7%of the value at the stable operation stage.The results of high-throughput sequencing showed that Ca_Anammoxoglobus was more suitable to mature landfill leachate,its relative abundances at the stable operation stage and after recovery of the PN/A were 12.41%and 11.19%,respectively.This study provides a useful technical guidance for the engineering application of the ANAMMOX process.
作者
黎勇敢
陈振国
范俊豪
周松伟
汪晓军
LI Yonggan;CHEN Zhenguo;FAN Junhao;ZHOU Songwei;WANG Xiaojun(School of Environment and Energy,South China University of Technology,Guangzhou 510006,China;School of Environment,South China Normal University,Guangzhou 510006,China;Hua An Biotech Co.Ltd.,Foshan 528300,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2023年第3期1033-1042,共10页
Chinese Journal of Environmental Engineering
基金
广东省科技计划项目重点领域研发计划项目(2019B110205002)
广东省基础与应用基础基金自然科学基金项目(2022A1515011466)
关键词
厌氧氨氧化
活性维持
快速恢复
中试
anaerobic ammonia oxidation
activity maintenance
rapid recovery
pilot-scale
