• 关键词：复三维电极-生物膜反应器  反硝化  无烟煤粒径  饮用水  硝酸盐

• 基金项目：国家重点基础发展规划项目(NKBRSFG1999045710);国家自然科学基金项目(59978050)

• 王海燕
• 中国科学院生态环境研究中心环境水化学国家重点实验室,北京 100085

• 曲久辉
• 中国科学院生态环境研究中心环境水化学国家重点实验室,北京 100085

• 雷鹏举
• 中国科学院生态环境研究中心环境水化学国家重点实验室,北京 100085

• 摘要：研究了无烟煤作填充介质时其粒径对复三维电极生物膜反应器脱硝效果的影响.选择了两种具有代表性的无烟煤粒径:平均粒径D分别为1.9mm和4.0mm.研究了两种粒径介质的反应器出水中的NO₃^--N、NO₂^--N、pH变化, 并对电流效率及处理负荷进行了对比.结果表明在一定电流下, 两反应器的NO₃^--N去除率均能达到98%;在同样操作条件下, D为1.9mm反应器的脱硝能力优于D为4.0mm反应器, 前者比后者对水中NO₃^--N的去除率高10%左右.D为1.9mm反应器的NO₃^--N最高容积负荷、NO₃^--N最高电极负荷、电流效率分别为0.015kg(m₃·h)、0.037mg(cm²·h)、360%, 均高于D为4.0mm反应器约10%.以小粒径无烟煤为介质的反应器的生物量明显高于大粒径介质反应器.

• Abstract：The influence of anthracite granule size on the denitrification of the three-demension-electrode biofilm reactor was studied. It was measured that the NO₃^--N,NO₂^--N and pH in the influent and effluent of the two reactors, which were packed with the 1.9mm granule anthracite and 4.0mm as medium respectively. The current efficiency and nitrate loading of the two reactors were compared during the operation. The experimental resultsndicated that the two reactors could both reach 98% denitrification efficiency. The denitrification capability of the 1.9mm reactor was higher than the 4.0mm reactor at the same operation conditions, and the nitrate removal efficiency of the 1.9mm reactor was 10% higher than that of the 4.0mm reactor. The highest volume loading of NO₃^--N, electrode surface area loading of NO₃^--N, and corresponding current efficiency of the 1.9mm reactor were 0.015kg·m₃·h^-1, 0.037mg·cm_-2·h_-1 and 360% respectively,which were about 10% higher than that of the 4.0mm reactor.

• Key words：three-dimension-electrode biofilm reactor  denitrification  anthracite granule size  drinking water  nitrate

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