磷酸铵镁碱促(Mg(OH)_2)热解产物氨氮去除性能  

Ammonium removal by struvite pyrolysate with Mg( OH)_2 technology

作　　者：余荣台[1] 任洪强[2] 王艳茹[2] 丁丽丽[2] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,景德镇333001 [2]南京大学污染控制与资源化研究国家重点实验室,南京210023

出　　处：《环境工程学报》2015年第5期2095-2098,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金面上项目(51178216);江苏省社会发展项目(BE2011774)

摘　　要：磷酸铵镁热解循环技术可以有效降低磷酸铵镁结晶技术的药剂费用。同时,在磷酸铵镁热解过程中添加Mg(OH)2碱促媒介,能阻止磷酸氢镁向焦磷酸镁的转化,并降低热解产物氨氮去除过程中上清液磷酸盐的残留。在Mg(OH)2∶NH+4摩尔比为1∶1,热解温度为110℃条件下,热解产物沉氨效率接近84%,上清液磷酸盐残留量为0.02 mg/L。The cost of chemical agent would be decreased by struvite pyrolysate recycling technology. The transformation of magnesium hydrogen phosphate to magnesium pyrophosphate was restrained by Mg( OH)2medium during struvite pyrolysis,and PO4-P residue in the supernate decreased during the process of ammonium removal by struvite pyrolysate with Mg( OH)2addition. Ammonium removal rate was about 84%,and PO4-P residue in the supernate was 0. 02 mg / L under the conditions of Mg( OH)2∶ NH+4( mole) of 1 ∶ 1; temperature of 110℃.

关 键 词：磷酸铵镁 MG(OH)2 热解产物 氨氮去除 

分 类 号：X703[环境科学与工程—环境工程]