摘要
厌氧铁氨氧化(Feammox)是一种以Fe^(3+)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p H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,p H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Fe^(3+)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。
Anaerobic iron ammonia oxidation(Feammox)is an autotrophic nitrogen removal process that uses Fe^(3+)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 Fe^(3+)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 weland achieved an ammonia nitrogen removal rate of 95%for rural domestic sewage,demonstrating micro-power and stable operation characteristics.
作者
陈天逸
李宁
吴琼
郭钦
江进
CHEN Tian-yi;LI Ning;WU Qiong;GUO Qin;JIANG Jin(School of Ecology,Environment and Resources,Guangdong University of Technology,Guangzhou 510006,China;Key Laboratory of the Pearl River Estuary Regulation and Protection of Ministry of Water Resources,Pearl River Water Resources Research Institute,Guangzhou 510611,China)
出处
《环境科技》
2024年第3期12-18,共7页
Environmental Science and Technology
基金
国家自然科学基金(青年科学基金项目(52000039))
珠科院科技创新自立项目([2022]YF 005)。
关键词
厌氧铁氨氧化
活性碳
生物脱氮
人工湿地
Feammox
Activated carbon
Biological nitrogen removal
Artificial wetland
