title: Biological N removal from wastes generated from amine-based CO2 capture: case monoethanolamine.
abstract: Large-scale amine-based CO(2) capture will generate waste containing large amounts of ammonia, in addition to contaminants such as the actual amine as well as degradation products thereof. Monoethanolamine (MEA) has been a dominant amine applied so far in this context. This study reveals how biological N removal can be achieved even in systems heavily contaminated by MEA in post- as well as pre-denitrification treatment systems, elucidating the rate-limiting factors of nitrification as well as aerobic and denitrifying biodegradation of MEA. The hydrolysis of MEA to ammonia readily occurred both in post- and pre-denitrification treatment systems with a hydraulic retention time of 7 h. MEA removal was ≥99 ± 1 % and total nitrogen removal 77 ± 10 % in both treatment systems. This study clearly demonstrates the advantage of pre-denitrification over post-denitrification for achieving biological nitrogen removal from MEA-contaminated effluents. Besides the removal of MEA, the removal efficiency of total nitrogen as well as organic matter was high without additional carbon source supplied.
authors: Department of Biotechnology, Norwegian University of Science and Technology (NTNU), 7491, Trondheim, Norway. ingrid.hauser@ntnu.no
authors: Ingrid
authors: I
authors: Hauser
authors: Ana B
authors: AB
authors: Colaço
authors: Julie A
authors: JA
authors: Skjæran
authors: Aslak
authors: A
authors: Einbu
authors: Kjetill
authors: K
authors: Ostgaard
authors: Hallvard F
authors: HF
authors: Svendsen
authors: Francisco J
authors: FJ
authors: Cervantes
mesh_terms: D000641:Ammonia / Q000378:metabolism; D002245:Carbon Dioxide / Q000378:metabolism*; D019856:Ethanolamine / Q000378:metabolism*; D058465:Nitrification
chemical_list: D002245:Carbon Dioxide; D019856:Ethanolamine; D000641:Ammonia