表观厌氧环境下短程硝化同步反硝化的实现与特征分析  

Realization and Characteristic Analysis of Short-Range Nitrification and Simultaneous Denitrification under Apparent Anaerobic Condition

作　　者：杜平 徐百龙 胡佳瑶 DU Ping;XU Bailong;HU Jiayao(Zhejiang Kaichuang Environmental Technology Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]浙江开创环保科技股份有限公司,浙江杭州310000

出　　处：《净水技术》2022年第S02期61-65,共5页Water Purification Technology

基　　金：浙江省重点研发计划项目(2021C03169)。

摘　　要：近年来,水体富营养化引起的水环境安全事件频发。总氮(TN)是引起水体富营养化的其中一个关键因素,废水脱氮处理能够有效减少TN的排放。研究采用序批式反应器(SBR),通过控制曝气量,建立溶解氧(DO)低于0.01 mg/L的表观厌氧环境,成功启动并维持了短程硝化及同步反硝化。低氨氮进水(80 mg/L)下,氨氮氧化率和亚硝酸盐氮(NO_(2)^(-)-N)转化率分别为99%和94%;高氨氮进水(160 mg/L)下,氨氮氧化率和NO_(2)^(-)-N转化率分别为98%和88%。比较分析发现,进水碳氮比(C/N)为2∶1时,短程硝化同步反硝化具有最高的成本效益,TN去除率和出水氨氮平均质量浓度分别约为50%和4.8 mg/L,去除1 g TN实际消耗4.94 g碱度(以CaCO_(3)计)。In recent years,water environmental safety incidents caused by eutrophication have occurred frequently.Total nitrogen(TN)is one of the key factors causing eutrophication,and wastewater denitrification treatment can effectively reduce the discharge of TN.In this study,dissolved oxygen(DO)concentration in sequencing batch reactor(SBR)was controlled under 0.01 mg/L by strict aeration control,and simultaneous partial nitrification and denitrification was achieved.In low influent ammonia nitrogen condition(80mg/L),rates of ammonia nitrogen oxidizing and nitrite nitrogen(NO_(2)^(-)-N)producing were 99%and 94%,respectively;in high influent ammonia nitrogen condition(160 mg/L),rates of ammonia nitrogen oxidizing and NO_(2)^(-)-N producing were 98%and 88%,respectively.It was the most cost-efficient to maintain simultaneous partial nitrification and denitrification at influent carbon to nitrogen ratio(C/N)ratio of 2∶1.In this condition,removing rate of TN and average of effluent ammonia nitrogen concentration were maintained at about 50%and 4.8 mg/L,respectively.To remove 1 g TN,at least 4.94 g alkalinity was required.

关 键 词：序批式反应器(SBR) 溶解氧(DO) 表观厌氧环境 短程硝化 同步反硝化 碳氮比(C/N) 碱度 

分 类 号：X703[环境科学与工程—环境工程]