Simultaneous recovery of phosphorus and nitrogen from liquid digestate by vacuum membrane distillation with permeate fractional condensation

作     者：Boya Qiu Senqing Fan Xiaoyu Tang Bufan Qi Liangwei Deng Wenguo Wang Jingyun Liu Yuyang Wang Zeyi Xiao Boya Qiu;Senqing Fan;Xiaoyu Tang;Bufan Qi;Liangwei Deng;Wenguo Wang;Jingyun Liu;Yuyang Wang;Zeyi Xiao

作者机构：School of Chemical EngineeringSichuan UniversityChengdu 610065China Biogas Institute of Ministry of Agriculture and Rural AffairsChengdu 610041China College of Pharmacy and Biological EngineeringChengdu UniversityChengdu 610106China Key Laboratory of Development and Application of Rural Renewable EnergyMinistry of Agriculture and Rural AffairsChengdu 610041China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第6期

页      面：1558-1565页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：supported by the Fundamental Research Funds for the Central Universities(No.20822041B4013) Key Laboratory of Development and Application of Rural Renewable Energy,Ministry of Agriculture and Rural Affairs,China(No.18H0491) 

主　　题：Liquid digestate Resource recovery Vacuum membrane distillation Permeate fractional condensation Enhanced separation factor 

摘      要：A vacuum membrane distillation(VMD)process with permeate fractional condensation on membrane downstream has been developed for simultaneous recovery of phosphorus and nitrogen from liquid *** polytetrafluoroethylene(PTFE)membrane flux could reach 6000 g·m-2·h-1 with the rejection efficiency of total phosphorus(TP)over 0.99,under the condition of flowrate being 120 L·h-1 and temperature being 40°*** fouling occurred with a film of organics and microorganism deposited on the surface of the *** flux could be reversed after the membrane was rinsed by *** feed temperature and flowrate could improve the membrane flux,while hardly affect the rejection efficiency of total *** concentration of TP could reach 1600 mg·L-1 after membrane distillation,which is about 5 times of that in initial liquid *** the downstream of the membrane,some of the permeate vapor was condensed under the vacuum condition and most of water was collected *** remaining vapor enriched with total nitrogen(TN)was compressed and pumped to the atmospheric condition to *** TN concentration in atmospheric condensate was as high as 7000 mg·L-1 with the process separation factor for ammonia being enhanced to 114.