活性碳介导厌氧铁氨氧化脱氮效能及影响因素
Biological Nitrogen Removal Performance and Its Influencing Factors of Activated Carbon Mediated-feammox
陈天逸 1李宁 1吴琼 2郭钦 3江进3
作者信息
- 1. 广东工业大学 生态环境与资源学院,广东 广州 510006;珠江水利委员会珠江水利科学研究院水利部珠江河口治理与保护重点实验室,广东 广州 510611
- 2. 珠江水利委员会珠江水利科学研究院水利部珠江河口治理与保护重点实验室,广东 广州 510611
- 3. 广东工业大学 生态环境与资源学院,广东 广州 510006
- 折叠
摘要
厌氧铁氨氧化(Feammox)是一种以Fe3+为电子受体的自养型脱氮工艺.利用活性碳(AC)作为电子穿梭体增加铁还原细菌的胞外电子转移速率和Feammox脱氮效率.考察了pH值、溶解氧、碳酸盐和硫酸盐浓度等对AC介导Feammox脱氮效能的影响.结果表明,pH值为 6～7 时有助于提升出水NH4+-N去除率.间隙曝气可以促进Fe3+再生从而使得Feammox持续脱氮.当碳酸盐、硫酸盐质量浓度分别为 250,150 mg/L时,NH4+-N和TN去除率分别达到94%和 91%.Feammox强化人工湿地对农村生活污水NH4+-N去除率达到 95%,具有微动力、运行稳定的特点.
Abstract
Anaerobic iron ammonia oxidation(Feammox)is an autotrophic nitrogen removal process that uses Fe3+as an electron acceptor.Activated carbon(AC)was used as an insoluble electron shuttle to increase the extracellular electron transfer rate of iron-reducing bacteria and enhance the feammox nitrogen removal efficiency.The effects of pH,dissolved oxygen,carbonate and sulfate concentrations on the performance of AC-mediated Feammox were investigated.The results showed that pH value 6～7 was conducive to promote the effluent NH4+-N removal efficiency.Intermittent aeration could promote Fe3+regeneration and enable continuous feammox denitrification.When the carbonate and sulfate concentrations were 250 mg/L and 150 mg/L,respectively,the removal rates of ammonia nitrogen and total nitrogen reached 94%and 91%,respectively.The feammox-enhanced constructed wetland achieved an ammonia nitrogen removal rate of 95%for rural domestic sewage,demonstrating micro-power and stable operation characteristics.
关键词
厌氧铁氨氧化/活性碳/生物脱氮/人工湿地Key words
Feammox/Activated carbon/Biological nitrogen removal/Artificial wetland引用本文复制引用
基金项目
国家自然科学基金青年科学基金(52000039)
珠科院科技创新自立项目([2022]YF 005)
出版年
2024
NETL
NSTL
万方数据