粉煤灰处理含氨氮废水的试验研究

Study on Removal of Ammonia-Nitrogen from Wastewater by Coal Ash

为了探讨以粉煤灰做吸附剂降低废水中氨氮含量的规律，用粉煤灰对含氨氮为10-200mg／L的模拟废水进行脱氨氮的试验。试验结果表明：粉煤灰是一种有效的吸附剂，在含氨氮为10-200mg／L的模拟废水中，每50mL废水粉煤灰用量为5-10g，粒径范围160日以上，pH值为4．5—6，振荡时间4h以上，在上述条件下氨氮去除效率在50％以上。

To reduce the ammonia - nitrogen in the wastewater, this paper studied the ability of coal ash to remove ammonia - nitrogen from wastewater. The results showed that coal ash is effective to adsorb ammonia - nitrogen. When concentration of ammonia - motrpgem was 10 - 200 mg/L, amount of coal ash used 5 - 10 g and particle size above 160 mesh, pH between 4.5 and 6, surge more than 4 hours, the efficiency of ammania - nitrogen removal rate reached above 50%.