Fan Jun-Hui, Hao Rui-Xia, Li Meng, Zhu Xiao-Xia, Wan Jing-Jing
Key laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing 100124, China.
Huan Jing Ke Xue. 2016 Nov 8;37(11):4275-4281. doi: 10.13227/j.hjkx.201604195.
In order to improve the phosphorus removal effect in the denitrification and phosphorus synchronous removal process by sulfur/sponge iron composite fillers, the phosphorus removal effect by different fillers with the coupling microorganisms was studied to analyze the denitrifying phosphorus removal mechanism of the microbial coupling sulfur/sponge iron composite fillers. The research result showed that the phosphorus removal ratio of sponge iron/sulfur composite fillers was over 95%, which was increased by 30% as compared to only sponge iron filler. In addition, the effluent TP concentration was reduced to less than 0.1 mg·L. The analysis of X-ray diffraction(XRD)and total iron concentration indicated that the main phosphorus removal system products which were produced in the corrosion and phosphorus removal process of sponge iron were FeOOH, FeS and Fe (PO) (OH) deposits and dissolved iron ions; FeS and FeOOH which were the hydrolysis products of Fe and Fe converted PO to Fe(PO)(OH) by adsorption and deposition so that phosphorus removal could be achieved. After the reactor of microbial coupling sulfur/sponge iron carbon composite fillers became stable, the removal efficiency of TN and TP could reach 90% and more than 83%, respectively; Corrosion of sponge iron and phosphorus removal process could also be promoted by biological iron and H that was produced in the sulfur autotrophic denitrification process, the system could realize the combination of "heterotrophic synergy autotrophic" composite denitrification and chemical phosphorus removal, and efficient denitrifying denitrification synchronous phosphorus removal process could be achieved in the urban sewage treatment plant.
为提高硫/海绵铁复合填料在反硝化除磷同步去除过程中的除磷效果，研究了不同填料与耦合微生物的除磷效果，以分析微生物耦合硫/海绵铁复合填料的反硝化除磷机制。研究结果表明，海绵铁/硫复合填料的除磷率超过95%，比仅使用海绵铁填料时提高了30%。此外，出水总磷浓度降至0.1mg·L以下。X射线衍射（XRD）分析和总铁浓度分析表明，海绵铁腐蚀除磷过程中产生的主要除磷体系产物为FeOOH、FeS和Fe(PO)(OH)沉淀以及溶解态铁离子；FeS和FeOOH作为Fe和Fe的水解产物，通过吸附和沉淀将PO转化为Fe(PO)(OH)，从而实现除磷。微生物耦合硫/海绵铁碳复合填料反应器稳定后，TN和TP的去除效率分别可达90%和83%以上；硫自养反硝化过程中产生的生物铁和H也可促进海绵铁的腐蚀和除磷过程，该系统可实现“异养协同自养”复合反硝化与化学除磷的结合，在城市污水处理厂可实现高效的反硝化同步除磷过程。
