化学沉淀法处理高氨氮模拟废水的研究  

Treatment of high ammonia-nitrogen simulated wastewater by chemical precipitation

作　　者：翟珊珊[1] 赵彬侠[1] 王琪[1] 刘雪松[1] 王进[2] 郭丹[1] 陈蓉[1] 

机构地区：[1]西北大学化工学院,陕西西安710069 [2]西安石油大学化学化工学院,陕西西安710065

出　　处：《西北大学学报（自然科学版）》2014年第6期918-922,共5页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省科技厅社发攻关基金资助项目(2013K13-01-04)

摘　　要：利用沉淀剂Mg Cl2和Na2HPO4,以磷酸铵镁的形式去除高浓度氨氮模拟废水中的NH4＋,考察了p H值、Mg∶N摩尔比对氨氮和无机磷去除率的影响,并对产物进行了电镜扫描（SEM）、傅里叶变换红外光谱（FTIR）表征。结果表明：当p H值为9.0~9.2,n（Mg2＋）：n（NH4＋）：n（PO43-）摩尔比为1.1∶1∶1时,氨氮去除率和无机磷去除率可分别达到96.64%和95.55%,产物为斜方形结构的磷酸铵镁沉淀。可见,化学沉淀法能够满足氨氮高去除率的要求,方便后续进一步的生化处理,同时,沉淀产物可用作氮肥,降低废水的处理成本。NH4 ＋ could be removed from the high ammonia-nitrogen simulated wastewater when utilizing MgC12 and NazHPO4 as settling agents. The influences of pH and molar ratio of Mg：N on the ammonia-nitrogen re moval and inorganic phosphorus removal were investigated. Moreover, the products in the process were analyzed by Scanning Electron Microscopy （SEM） and Fourier Transform Infrared Spectroscopy （FFIR）. When the experiment was conducted under optimal pH value （9.0 - 9.2） and optimal ion molar ratio （ Mg2 ＋ ： NH4 ＋ ：PO43- was 1.1 ： 1 ： 1 ） , the removal rate of ammonia-nitrogen and inorganic phosphorus was up to 96.64% and 95.55% respectively. Besides, it was shown that the experimental products were magnesium ammonium phosphate precipitation with oblique structure under optimized conditions. Therefore, this treatment of wastewater can achieve high ammonie-nitrogen removal rate in order to make it available for biochemical treatment, meanwhile, the precipitation used as nitrogen fertilizer can decrease the treatment cost.

关 键 词：沉淀 氨氮 去除率 废水处理 

分 类 号：X131[环境科学与工程—环境科学]