Feasibility of a membrane-aerated biofilm reactor to achieve single-stage autotrophic nitrogen removal based on Anammox.
A laboratory-scale membrane-aerated biofilm bioreactor (MABR) equipped with non-woven fabrics support around the gas-permeable carbon tube was developed for single-stage autotrophic nitrogen removal based on partial nitrification and anaerobic ammonium oxidization. This reactor allowed air to be supplied through the microporous carbon tube wall to the biofilm that was supported by non-woven fabrics. The partial nitrification and consumption of dissolved oxygen occurred in the inner layer and Anammox in the anoxic outer layer of the non-woven fabrics, thus realizing autotrophic nitrogen removal in a single reactor. After 116d of operation, the maximal nitrogen removal of 0.77kgNm(-3)d(-1) at a volumetric ammonium loading rate of 0.87kgNm(-3)d(-1) was achieved. The spatial profiles of the ammonia-oxidizing bacteria and Anammox bacteria were evaluated by fluorescence in situ hybridization. This study demonstrated that MABR was a very suitable experimental set-up for the operation of the single-stage autotrophic nitrogen removal process.
Gong
Zheng
Z
Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, School of Environmental and Biological Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian, Liaoning 116024, PR China.
Yang
Fenglin
F
Liu
Sitong
S
Bao
Han
H
Hu
Shaowei
S
Furukawa
Kenji
K
D000332:Aerobiosis; D000641:Ammonia / Q000737:chemistry; D000693:Anaerobiosis; D052818:Autotrophic Processes; D020562:Betaproteobacteria; D018441:Biofilms / Q000254:growth & development*; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D005240:Feasibility Studies; D008567:Membranes, Artificial; D009576:Nitrobacter; D009584:Nitrogen / Q000032:analysis*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
D008567:Membranes, Artificial; D000641:Ammonia; D009584:Nitrogen