Hybrid Donnan dialysiseelectrodialysis for efficient ammonia recovery from anaerobic digester effluent  

作　　者：Zhinan Dai Cong Chen Yifan Li Haoquan Zhang a Jingmei Yao Mariana Rodrigues Philipp Kuntke Le Han 

机构地区：[1]Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment,Ministry of Education,College of Environment and Ecology,Chongqing University,Chongqing,400045,PR China [2]Wetsus,European Centre of Excellence for Sustainable Water Technology,Oostergoweg 98911MA Leeuwarden P.O.Box 1113,8900 CC,Leeuwarden,the Netherlands [3]Environmental Technology,Wageningen University,Bornse Weilanden 96708 WG Wageningen P.O.Box 17,6700 AA,Wageningen,the Netherlands

出　　处：《Environmental Science and Ecotechnology》2023年第3期128-135,共8页环境科学与生态技术（英文）

基　　金：support provided by the National Natural Science Foundation of China(51908083,52270058);the Venture&Innovation Support Program for Chongqing Overseas Returnees(CX2021121);the National Key Research and Development Program of China(2022YFC3203402);the Graduate Research and Innovation Foundation of Chongqing,China(CYS22066)。

摘　　要：Ammonia recovery from wastewater is crucial,yet technology of low carbon emission and high ammonia perm-selectivity against complex stream compositions is urgently needed.Herein,a membrane-based hybrid process of the Donnan dialysiseelectrodialysis process(DDeED)was proposed for sustainable and efficient ammonia recovery.In principle,DD removes the majority of ammonia in wastewater by exploring the concentration gradient of NH4 t and driven cation(Nat)across the cation exchange membrane,given industrial sodium salt as a driving chemical.An additional ED stage driven by solar energy realizes a further removal of ammonia,recovery of driven cation,and replenishment of OHtoward ammonia stripping.Our results demonstrated that the hybrid DDeED process achieved ammonia removal efficiency>95%,driving cation(Nat)recovery efficiency>87.1%for synthetic streams,and reduced the OH-loss by up to 78%compared to a standalone DD case.Ammonia fluxes of 98.2 gN m^(-2)d^(-1)with the real anaerobic digestion effluent were observed using only solar energy input at 3.8 kWh kgN^(-1).With verified mass transfer modeling,reasonably controlled operation,and beneficial recovery performance,the hybrid process can be a promising candidate for future nutrient recovery from wastewater in a rural,remote area.

关 键 词：Ammonia recovery Donnan Dialysis ELECTRODIALYSIS Brine utilization Anaerobic digester effluent 

分 类 号：X703[环境科学与工程—环境工程]