固定床-微电解反硝化去除饮用水中的硝酸盐氮

研究了一种电化学与生物膜集成的固定床-微电解反应器采用活性炭作为固定床填料,石墨板为阳极,碳纤维为阴极,通过电化学过程产氢作为反硝化的电子供体,在反应器内创造一种还原性条件,对含有硝酸盐氮的饮用水进行反硝化脱除.结果表明,在进水流量为40mL/h、硝酸盐氮浓度为40mg/L、电流强度达到14mA时,所研究的反应器对水中的硝酸盐氮可以100%去除,水中未检出亚硝酸盐氮.由于反硝化过程不加外加任何有机物,也不产生任何二次污染物,该除氮方法具有安全性.

Denitrification of Drinking Water with An Active Carbon-Electrochemical Biological Reactor

A packed bed electrochemical bilogical reactor was studied and utilized for denitrification of drinking water. Using active carbon as the filter, graphite plate as anode, and active carbon fibre as cathodes, an optimum reductive condition in the reactor was established for denitrification of nitrate. The test results proved that both nitrate and nitrite in the water could be removed effectively. At the case of 40mL/h inflow, 40mg/L of NO₃-N, and 14mA of current density, a 100% denitrifiction rate was achieved and no nitrite was detected. Because there is no any additional pollution in the treating process, this method is suggested to be a safety process for drinking water denitrification.