生物接触氧化法去除微污染水中氨氮的中试研究  

Pilot-scale Study on the Removal of Ammonia Nitrogen from Micro-polluted Water by Bio-contact Oxidation Process

作　　者：罗锋 盛德洋[1] 张忠祥 陶涛 LUO Feng;SHENG De‑yang;ZHANG Zhong‑xiang;TAO Tao(Dongguan Water Group Co.Ltd.,Dongguan 523000,China;School of Environmental Science&Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]东莞市水务集团有限公司,广东东莞523000 [2]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《中国给水排水》2022年第20期109-115,共7页China Water & Wastewater

摘　　要：对辫带式悬挂填料生物接触氧化法处理微污染运河水进行中试研究,结果表明,在原水自然挂膜条件下,采用闷曝和逐渐缩短停留时间的方式,挂膜启动过程在21 d内完成,氨氮去除率达到94.5%;挂膜完成后的填料表面生物相丰富,外观蓬松分散,并未聚结成团;稳定期进水氨氮日均值为6.40~7.74 mg/L,氨氮去除量为4.63~5.42 mg/L,平均为5.0 mg/L,硝化负荷为0.17~0.20kgN/(m^(3)·d);氨氮去除率随推流方向先升高后略有降低,前、中、后段平均硝化负荷分别为0.12、0.26、0.21 kgN/(m^(3)·d),最高达0.31 kgN/(m^(3)·d);将水力负荷由15.3 m^(3)/(m^(2)·d)提升到25.2 m^(3)/(m^(2)·d),氨氮去除率由90.3%下降至70.1%,46 h后恢复至95.9%;将氨氮浓度由5.47 mg/L提高到8.0 mg/L,氨氮去除量由4.89 mg/L降至3.30 mg/L,39 h后恢复至4.88 mg/L。辫带式悬挂填料生物接触氧化法挂膜启动简单快捷,氨氮去除效果稳定,对水力和氨氮负荷冲击适应能力良好,可为微污染水体修复或微污染水源水预处理提供借鉴。A pilot study on the treatment of micro-polluted river water by bio-contact oxidation process with braided suspended filler was carried out.The results showed that under the condition of natural biofilm formation,the start-up process of pilot-scale plant was completed within 21 days by means of closed aeration and gradually shortening the residence time with the ammonia nitrogen removal rate of94.5%.The filler surface was rich in biophase and the appearance was fluffy and dispersed without agglomerate.In the stable period,the daily average influent ammonia nitrogen was 6.40-7.74 mg/L,the ammonia nitrogen removal amount was 4.63-5.42 mg/L with average of 5.0 mg/L,and the nitrification load reached 0.17-0.20 kgN/(m^(3)·d).The ammonia nitrogen removal efficiency of different sections first increased and then decreased slightly with the flow.The average nitrification loads of the front,middle and posterior sections were 0.12,0.26,0.21 kgN/(m^(3)·d)respectively,up to 0.31 kgN/(m^(3)·d).The ammonia nitrogen removal rate decreased from 90.3%to 70.1%,while the hydraulic load increased from 15.3m^(3)/(m^(2)·d)to 25.2 m^(3)/(m^(2)·d),and recovered to 95.9%after 46 h operation.The ammonia nitrogen removal amount decreased from 4.89 mg/L to 3.30 mg/L when the influent ammonia nitrogen concentration increased from 5.47 mg/L to 8.0 mg/L,and recovered to 4.88 mg/L after 39 h operation.The bio-contact oxidation method with braided suspended filler has the advantages of simple and fast start-up,stable ammonia nitrogen removal efficiency and good adaptability to the impact of hydraulic and ammonia nitrogen load,which can provide reference to the remediation of micro-polluted water body or the pretreatment of micro-polluted source water.

关 键 词：悬挂填料 生物接触氧化 微污染水 氨氮 

分 类 号：TU992[建筑科学—市政工程]