摘要
利用包埋固定化技术进行反硝化脱氮,通过控制反应器参数,在以乙酸钠为碳源、填充率为20%、碳氮比为3. 5:1、进水硝态氮平均浓度为15 mg/L的条件下,经过15 d的启动和驯化,反应器出水硝态氮平均浓度降为1. 74 mg/L,TN去除率在90%以上;提高进水硝态氮平均浓度至29. 98 mg/L时,出水硝态氮平均浓度为3. 60 mg/L,TN去除率达到85%以上。在此过程中脱氮效率和pH值的升高呈现出良好的正相关性。反应器停止运行14 d后再重新启动,5 d后即可恢复脱氮能力。在碳氮比为2. 2:1的情况下,脱氮效率下降,同时出现亚硝态氮的积累;而在碳氮比为6:1的情况下,未出现亚硝态氮的积累,说明亚硝态氮的积累与碳源的供给情况相关。
The embedded immobilized technology was applied in the denitrification process.Using sodium acetate as the carbon source,under filling rate of 20%,C/N ratio of 3.5:1 and influent nitrate concentration of 15mg/L,after 15days of start-up and domestication,the average effluent nitrate concentrations was 1.74mg/L,and the TN removal rate exceeded 90%.When the average influent nitrate concentration was increased to 29.98mg/L,the effluent nitrate concentration averaged at 3.60mg/L, and the TN removal rate reached above 85%.In this process,the TN removal efficiency showed a positive correlation with pH.The reactor was restarted after 14days of idling,and it took five days to recovery the denitrification capacity.When the C/N ratio was 2.2:1,the removal efficiency declined,and the nitrite was accumulated.However,no nitrite accumulation was identified when the C/N ratio was 6:1.It showed that the nitrite accumulation was related to the carbon source.
作者
宋佳强
李军
陈光辉
张振家
SONG Jia-qiang;LI Jun;CHEN Guang-hui;ZHANG Zhen-jia(Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100124,China;School of Environmental Science &Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2018年第23期105-110,共6页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2014ZX07406002)
国家自然科学基金资助项目(51078008)
北京市自然科学基金资助项目(8122005)
北京市教委重点项目(KZ201110005008)
北京市教委科技创新平台资助项目(004000546612010)
清华大学固体废物处理与环境安全教育部重点实验室开放基金资助项目(swmes 2010-01)
关键词
包埋固定化技术
反硝化菌
脱氮
碳氮比
embedded immobilized technology
denitrifying bacteria
nitrogen removal
C/N ratio
作者简介
宋佳强(1987-),男,河南新乡人,硕士,研究方向为污水生物处理技术。E-mail:songjiaqiang@126.com;通信作者:李军,E-mail:jglijun@bjut.edu.cn。
