摘要
MAP沉淀法处理高NH3-N废水，操作简便，处理效果好。本试验以NH3-N浓度为1000mg／L的模拟废水为研究对象，研究结果表明，在Mg^2＋：PO4^3-：NH4^＋=1．2：1．2：1（摩尔比）、NaOH投加量为6．75g／L的条件下NH3-N去除率高达98％以上。试验选择出水pH作为控制反应进程的参数，并建立了出水pH与NH3-N去除率之间的关系。通过调整NaOH投加量控制出水pH在7．5～8之间时，NH3-N去除率最高，可达98％以上。x-衍射图谱及定量分析表明，沉淀物中MAP的纯度较高，具有一定的回收价值。
The method of MAP precipitation to treat high NH3-N wastewater was simple and effective. This trial used simulated wastewater of NH3-N concentration 1 000 mg/L as the research object. The results demonstrated that with the ratio of Mg^2＋ ： PO4^3- ： NH4＋ = 1.2： 1.2：1 （ molar ratio） and NaOH dosage of 6.75 g/L, the removal rate of NH3-N can reach as high as 98%. The experiment chose effluent pH as the the parameter to control the reaction process, and established the relationship between effluent pH and NH3-N removal rate. Controlled the effluent pH between 7.5 - 8 by adjusting NaOH dosage, the removal rate of NH3-N was highest and could reach 98 percent. The XRD spectra and quantitative analysis of precipitates indicated that the MAP precipitation had high purity, and had certain recovery value.
出处
《环境工程学报》
CAS
CSCD
北大核心
2009年第3期493-496,共4页
Chinese Journal of Environmental Engineering
