CAJ | 학술논문

将含有2g/L镁离子的镁剂烟气脱硫废水用于废水脱氮除磷，探讨了影响废水脱氮除磷效率的因素。结果表明，对NH3-N为578 mg/L、PO43--P为1352 mg/L的废水，当n（Mg2+）∶n（NH4+）∶n（PO43-）=2∶1∶1.6，pH=9.5，反应时间为10 min，搅拌转速为300 r/min时，氨氮去除率可达到80%，磷酸盐去除率达到91.5%。脱氮除磷的产物磷酸铵镁（MAP）可以用做缓释肥等。将镁剂烟气脱硫废水用于废水脱氮除磷，可达到以废治废的目的，该技术具有良好的应用前景。
장함유2g/L미리자적미제연기탈류폐수용우폐수탈담제린，탐토료영향폐수탈담제린효솔적인소。결과표명，대NH3-N위578 mg/L、PO43--P위1352 mg/L적폐수，당n（Mg2+）∶n（NH4+）∶n（PO43-）=2∶1∶1.6，pH=9.5，반응시간위10 min，교반전속위300 r/min시，안담거제솔가체도80%，린산염거제솔체도91.5%。탈담제린적산물린산안미（MAP）가이용주완석비등。장미제연기탈류폐수용우폐수탈담제린，가체도이폐치폐적목적，해기술구유량호적응용전경。
The wastewater containing about 2 g/L magnesium ions from MgO flue gas desulphurization slag has been used for removing nitrogen and phosphorus of wastewater. Influencing factors that have effects on the removal of nitrogen and phsphorus by using the wastewater are discussed. The results show that for the wastewater containing 578 mg/L of NH3-N and 1 352 mg/L of PO43--P,the removing rates of NH4+-N and phosphate are 80%and 91.5%, respectively,under the following optimal conditions:n(Mg2+)∶n(NH4+)∶n(PO43-)=2∶1∶1.6,pH=9.5,reaction time=10 min,stirring speed about 300 r/min. The MAP as prepared can be used as slow-release fertilizer. The results show that applying MgO flue gas desulphurization wastewater to the removal of nitrogen and phosphorus of wastewater can reach the goal of“treating waste with waste”. Therefore,this process has very good prospect.