泥炭作为缓释碳源对反硝化过程的影响  

Effect of peat as a slow-release carbon source on denitrification process

作　　者：段文雪 李龙国[1,2] 刘超[1,2] 李乃稳[1,2] DUAN Wenxue;LI Longguo;LIU Chao;LI Naiwen(College of Water Resource&Hydropower,Sichuan University,Chengdu Sichuan 610065;State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu Sichuan 610065)

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《环境污染与防治》2020年第4期457-460,466,共5页Environmental Pollution & Control

基　　金：四川省科技支撑计划重点研发项目(No.2018SZ0279);成都市重大科技应用示范项目(No.2019-YF09-00081-SN)。

摘　　要：采用柱实验,以泥炭颗粒作为缓释碳源,探究不同水力停留时间(HRT)下泥炭颗粒对反硝化过程的影响。结果表明:(1)泥炭颗粒可作为有效缓释碳源,当HRT为6.67h时,脱氮效果最好,硝酸盐氮去除率能达到81.9%。(2)出水COD较低,最终为9~12mg/L,不会对水体造成二次污染;亚硝酸盐氮先升后降,最终均小于0.2mg/L,未出现积累现象,泥炭颗粒可作为生物脱氮反应器中长期运行的缓释碳源。Using peat particle as the slow-release carbon source,the column reactor experiment was conducted to investigate nitrate removal at different hydraulic retention times(HRT).The results showed that:(1)peat particles could be used as an effective slow-release carbon source.When HRT was 6.67 h,the denitrification effect was the best,and the removal rate of nitrate nitrogen could reach 81.9%.(2)The COD in effluent was low,which was 9-12 mg/L and didn’t cause secondary pollution to the water.Nitrite nitrogen first increased and then decreased,and finally all was less than 0.2 mg/L.There was no accumulation of nitrite during the experiment.Peat was suitable as a slow-release carbon source for long-term operation in biological nitrogen removal reactors.

关 键 词：泥炭 缓释碳源 反硝化过程 硝酸盐氮 

分 类 号：X703[环境科学与工程—环境工程]