摘要
针对纳污河水碳氮比较低的问题,采用芦苇碳源后置反硝化生物滤池(Post-DBF)强化反硝化脱氮,重点考察了进水量(17. 28、28. 80、43. 20 L/d)对系统脱氮效果的影响。当进水量为17. 28 L/d时,后置反硝化滤池对COD、TN和NH4^+-N的去除率分别为78. 81%、78. 23%和70. 21%,出水水质达到了《城市污水再生利用景观环境用水水质》(GB/T 18921—2002)标准。其中,Post-DBF的硝化段可以去除大部分有机物,占系统总去除率的87. 34%。在进水与芦苇碳源有足够长接触时间(> 2. 6 h)的情况下,芦苇能够为系统缺氧段提供一定的碳源,使反硝化过程得以稳定进行,弥补了传统低碳氮比污水因碳源不足而产生的脱氮效率低下的缺陷。
Reed carbon source was added to the post denitrification biofilter ( Post-DBF) to enhance the nitrogen removal in the low C/N ratio polluted river water, and the effects of influent flow (17.28 L/d, 28. 80 L/d and 43. 20 L/d) on the denitrification efficiency were investigated. When the influent flow was 17. 28 L/d, the mean removal rates of COD, TN and NH4^+- N of Post-DBF were 78. 81%, 7. 23% and 70. 21% respectively, and the effluent quality reached the standard of The Reuse of Urban Recycling Water-Water Quality Standard for Scenic Environment Use ( GB/T 18921 - 2002 ). The nitrification stage of Post-DBF could remove most of the organic matter, accounting for 87. 34% of the total removal rate of the system. In case of the influent and reed carbon source had enough contact time (>2. 6 h), reed straw could provide carbon source for the anoxic denitrification process, making up for the low denitrification efficiency of low C/N ratio wastewater.
作者
汤同欢
陈丙法
金婧梅
陈开宁
李勇
黄蔚
TANG Tong-huan;CHEN Bing-fa;JIN Jing-mei;CHEN Kai-ning;LI Yong;HUANG Wei(School of Ejwironmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215000, China;State Key Laboratory of Lake Science and En/vironment, Nanjing Institute of Geography and Limnology, Chinese Academy cf Sciences, Nanjing 210008 , China;University of Chinese Academy of Sciences, Beijing 100049, China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第5期19-23,29,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(2017ZX07603-05)
国家自然科学基金资助项目(51409166)
太湖水污染治理专项资金资助项目(TH2016401)
关键词
后置反硝化
固体碳源
生物滤池
低碳氮比
post denitrification
solid carbon source
biofilter
low C/N ratio
