短程硝化亚硝态氮积累策略及过程调控  

Accumulation strategy and process control of nitrite nitrogen in short-range nitrification

作　　者：刘晓吉 张莹莹 周阳 薛同站 李卫华 奚望 LIU Xiaoji;ZHANG Yingying;ZHOU Yang;XUE Tongzhan;LI Weihua;XI Wang(China Energy Conservation(Feixi)Environmental Protection Energy Co.,Ltd.,Hefei Anhui 231241;Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse,Hefei Anhui 230601;School of Environment and Energy Engineering,Anhui Jianzhu University,Hefei Anhui 230601)

机构地区：[1]中节能(肥西)环保能源有限公司,安徽合肥231241 [2]环境污染控制与废弃物资源化利用安徽省重点实验室,安徽合肥230601 [3]安徽建筑大学环境与能源工程学院,安徽合肥230601

出　　处：《环境污染与防治》2025年第4期27-34,I0002,共9页Environmental Pollution & Control

基　　金：国家重点研发计划项目子课题(No.2020YFC1908603);国家自然科学基金资助项目(No.51978003);安徽高校自然科学研究项目(No.2022AH050258);中国节能环保集团有限公司重大科技创新项目(No.cecep-zdkj-2020-001)。

摘　　要：为进行高氨氮废水高效低耗处理,稳定持续实现亚硝态氮(NO_(2)^(-)-N)积累成为脱氮耦合工艺的关键环节。通过间歇式曝气控制溶解氧(DO)质量浓度为0.5 mg/L条件下,采用羟胺作为抑制剂实现了亚硝酸盐快速积累。利用梯度实验探讨了氨氧化菌(AOB)和亚硝酸盐氧化菌(NOB)对不同环境温度、有机物及抑制剂的响应机理,阐明了高氨氮废水进行短程硝化调控的关键参数。实验结果表明,投加5 mg/L左右的羟胺可在20 d时实现NO_(2)^(-)-N约80%的积累率,可降解有机物质量浓度在100 mg/L时,出水NO_(2)^(-)-N质量浓度呈下降趋势且平均为78.28 mg/L。当温度由15℃升至25℃时亚硝态氮积累率(NAR)可达到87.79%,可为耦合厌氧氨氧化实现零碳脱氮提供基质保障。研究结果可为高氨氮废水处理NO_(2)^(-)-N积累调控及耦合厌氧氨氧化工艺用于实际废水的处理提供技术支持。In order to treat high ammonia nitrogen wastewater with high efficiency and low consumption,it has become a key link that nitrite nitrogen(NO_(2)^(-)-N)is accumulated with stably and continuously in the coupled process of nitrogen removal.The rapid accumulation of nitrite was achieved by using hydroxylamine as inhibitors under the condition that dissolved oxygen(DO)concentration was controlled by intermittent aeration at 0.5 mg/L.The response mechanism of ammonia-oxidizing bacteria(AOB)and nitrite-oxidizing bacteria(NOB)to different environmental temperature,organic matter and inhibitors was investigated by gradient experiment,and the key parameters of short-range nitrification control of ammonia nitrogen wastewater were clarified.The experimental results showed that about 80%of NO_(2)^(-)-N could be accumulated at 20 days by adding about 5 mg/L hydroxylamine.When the concentration of degradable organic matter was 100 mg/L,the concentration of NO_(2)^(-)-N in effluent showed a decreasing trend and was 78.28 mg/L on average.When the temperature rised from 15℃to 25℃,the accumulation rate of nitrite nitrogen(NAR)could reach 87.79%,which could provide substrate support for coupled anaerobic ammox to achieve zero carbon nitrogen removal.It can provide technical support for the control of NO_(2)^(-)-N accumulation in the treatment of high ammonia nitrogen wastewater and the coupled anaerobic ammonia oxidation process for the treatment of actual wastewater.

关 键 词：短程硝化 可降解有机物 抑制剂 亚硝态氮积累率 

分 类 号：X703[环境科学与工程—环境工程]