Achieving nitritation and anammox enrichment in a single moving-bed biofilm reactor treating reject waterZekker, Ivar; Rikmann, Ergo; Tenno, Taavo; Saluste, Anne; Tomingas, Martin; Menert, Anne; Loorits, Liis; Lemmiksoo, Vallo; Tenno, ToomasEnvironmental technology2012 / p. 703-710 : ill https://pubmed.ncbi.nlm.nih.gov/22629646/ Achieving nitritation and anammox enrichment in single moving bed biofilm reactor treating reject waterZekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Saluste, Anne; Lemmiksoo, Vallo; Menert, Anne; Loorits, Liis; Tenno, TaavoAGRO 2011 : 8th IWA International Symposium on Waste Management Problems in Agroindustries : Cesme, Izmir, Turkey, 22-24 June 2011 : proceedings. 22011 / p. 827-828 https://www.tandfonline.com/doi/full/10.1080/09593330.2011.588962 Adsorption and kinetics studies of Cr (VI) by graphene oxide and reduced graphene oxide-zinc oxide nanocompositeNaseem, Taiba; Bibi, Fozia; Arif, Saira; Waseem, Muhammad Adnan; Haq, Sirajul; Azra, Mohamad Nor; Liblik, Taavi; Zekker, IvarMolecules2022 / art. 7152, 16 p. : ill https://doi.org/10.3390/molecules27217152 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Ameliorating effect of nitrate on nitrite inhibition for denitrifying P-accumulating organismsZekker, Ivar; Mandel, Anni; Rikmann, Ergo; Jaagura, Madis; Salmar, Siim; Ghangrekar, Makarand Madhao; Tenno, TaavoScience of the total environment2021 / art. 149133, 10 p. : ill https://doi.org/10.1016/j.scitotenv.2021.149133 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Anaerobic ammonium oxidation process performance with optimum bicarbonate concentrationZekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Menert, Anne; Tomingas, Martin; Kroon, K.; Vabamäe, Priit; Tenno, TaavoAgricultural research : abstract book from the 4th Annual International Symposium on Agricultural Research : 18-21 July 2011, Athens, Greece2011 / p. 69-71 : ill Anaeroobse ammoniumlämmastiku oksüdatsiooni protsessi kiirendamine NH2OH ja N2H4-gaZekker, Ivar; Kroon, K.; Rikmann, Ergo; Tenno, Toomas; Menert, Anne; Tenno, TaavoXXXII Eesti Keemiapäevad : teaduskonverentsi teesid2011 / lk. 114 https://www.ester.ee/record=b2679915*est Anammox bacteria enrichment and phylogenic analysis in moving bed biofilm reactorsZekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Vabamäe, Priit; Tomingas, Martin; Menert, Anne; Loorits, Liis; Tenno, TaavoEnvironmental engineering science2012 / p. 946-950 https://www.liebertpub.com/doi/abs/10.1089/ees.2011.0146?journalCode=ees Anammox enrichment from reject water on blank biofilm carriers and carriers containing nitrifying biomass : operation of two moving bed biofilm reactors (MBBR)Zekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Lemmiksoo, Vallo; Menert, Anne; Loorits, Liis; Vabamäe, Priit; Tomingas, Martin; Tenno, TaavoBiodegradation2012 / p. 547-560 : ill https://www.researchgate.net/publication/221811952_Anammox_enrichment_from_reject_water_on_blank_biofilm_carriers_and_carriers_containing_nitrifying_biomass_Operation_of_two_moving_bed_biofilm_reactors_MBBR ANAMMOX-denitrification biomass in microbial fuel cell to enhance the electricity generation and nitrogen removal efficiencyZekker, Ivar; Bhowmick, Gourav Dhar; Priks, Hans; Nath, Dibyojyoty; Rikmann, Ergo; Jaagura, MadisBiodegradation2020 / p. 249 - 264 https://doi.org/10.1007/s10532-020-09907-w Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Biological treatment of anaerobic digester supernatant by anaerobic ammonium oxidation method in UASB systemTomingas, Martin; Zekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Menert, Anne; Kroon, Kristel; Tenno, TaavoSustainChem2011 : International Conference on Materials and Technologies for Green Chemistry jointly with Workshop of COST Action CM0903 (UBIOCHEM-II) : September 5-9, 2011, Tallinn, Estonia : abstract book and program2011 / p. 140 Combined treatment of pyrogenic wastewater from oil shale retortingKlein, Kati; Kattel, Eneliis; Goi, Anna; Kivi, Arthur; Dulova, Niina; Saluste, Alar; Zekker, Ivar; Trapido, Marina; Tenno, TaavoOil shale2017 / p. 82-96 : ill https://doi.org/10.3176/oil.2017.1.06 Effect of bicarbonate concentration on Anaerobic ammonium oxidation for efficient autotrophic nitrogen removalZekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Menert, Anne; Lemmiksoo, Vallo; Kolberg, K.; Tenno, TaavoIWA Specialist Conference Water and Industry : Valladolid, Spain, 1-4 May 2011 : final program2011 / p. 16 Enhanced efficiency of nitritating-anammox sequencing batch reactor achieved at low decrease rates of oxidation-reduction potentialZekker, Ivar; Kivirüüt, Aimar; Rikmann, Ergo; Mandel, Anni; Jaagura, Madis; Tenno, Toomas; Artemchuk, Oleg; Rubin, Sergio Dc; Tenno, TaavoEnvironmental Engineering Science2019 / p. 350-360 https://doi.org/10.1089/ees.2018.0225 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Enhancement of anoxic phosphorus uptake of denitrifying phosphorus removal process by biomass adaptionMandel, Anni; Zekker, Ivar; Jaagura, Madis; Tenno, TaavoInternational journal of environmental science and technology2019 / p. 5965–5978 : ill https://doi.org/10.1007/s13762-018-02194-2 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Environmental impact of water exchange blocking in a strait – a multidisciplinary study in the Baltic SeaLiblik, Taavi; Buschmann, Fred; Siht, Ergo; Kuprijanov, Ivan; Väli, Germo; Lipp, Maarja; Erm, Ants; Laanemets, Jaan; Eschbaum, Redik; Verliin, Aare; Saks, Lauri; Zekker, IvarOceanologia2023 / 17 p. : ill https://doi.org/10.1016/j.oceano.2023.06.002 Mainstream-sidestream wastewater switching promotes anammox nitrogen removal rate in organic-rich, low-temperature streamsZekker, Ivar; Raudkivi, Markus; Artemchuk, Oleg; Rikmann, Ergo; Priks, Hans; Jaagura, Madis; Tenno, TaavoEnvironmental technology2021 / 10 p. : ill https://doi.org/10.1080/09593330.2020.1721566 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Modification of nitrifying biofilm into nitritating one by combination of increased free ammonia concentrations, lowered HRT and dissolved oxygen concentrationZekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Menert, Anne; Lemmiksoo, Vallo; Saluste, Anne; Tenno, Taavo; Tomingas, MartinJournal of environmental sciences2011 / p. 1113-1121 : ill Nitritating-anammox biomass tolerant to high dissolved oxygen concentration and C/N ratio in treatment of yeast factory wastewaterZekker, Ivar; Rikmann, Ergo; Tenno, Toomas; Seiman, Andrus; Loorits, LiisEnvironmental technology2014 / p. 1565-1576 : ill A pilot study of three-stage biological-chemical treatment of landfill leachate applying continuous ferric sludge reuse in Fenton-like processKlein, Kati; Kivi, Arthur; Dulova, Niina; Zekker, Ivar; Mölder, Erik; Tenno, Toomas; Trapido, Marina; Tenno, TaavoClean technologies and environmental policy2017 / p. 541-551 : ill https://doi.org/10.1007/s10098-016-1245-5 Rapid start- up of autotrophic nitrogen removal process after inoculation with microorganisms from yeast factory anaerobic tankZekker, Ivar; Kroon, Kristel; Pitk, Peep; Loorits, LiisTÜ ja TTÜ doktorikool “Funktsionaalsed materjalid ja tehnoloogiad”2013 / [1] p. : ill Research of specific nitrite oxidation rate on high surfaced biofilms carriers with free ammonia and temperature variationsZekker, Ivar; Tenno, Toomas; Tenno, Taavo; Lemmiksoo, Vallo; Rikmann, Ergo; Menert, Anne; Kolberg, K.3rd EuCheMS Chemistry Congress : Chemistry - the Creative Force : 29.08.-02.09.2010, Nürnberg, Germany : [abstracts]2010 / [1] p https://www.etis.ee/Portal/Publications/Display/e183db0e-18fc-43e3-9bab-bdc76c638e92 Specific nitrite oxidation rate on high surfaced biofilm carriers dependent on free ammonia and temperatureZekker, Ivar; Tenno, Toomas; Tenno, Taavo; Lemmiksoo, Vallo; Rikmann, Ergo; Menert, Anne; Kolberg, K.; Tomingas, Martin; Kroon, K.; Vabamäe, Priit2nd Workshop on Bacterial and Fungal Biofilms : Ghent University Center for Sociomicrobiology, 22 September 20112011 https://www.etis.ee/Portal/Publications/Display/33df8771-46e4-46c6-a2da-dbd4efb91a17 Start-up of low-temperature anammox in UASB from mesophilic yeast factory anaerobic tank inoculumZekker, Ivar; Rikmann, Ergo; Seiman, Andrus; Loorits, LiisEnvironmental technology2015 / p. 214-225 : ill Sulfate-reducing anaerobic ammonium oxidation as a potential treatment method for high nitrogen-content wastewaterRikmann, Ergo; Zekker, Ivar; Tomingas, Martin; Tenno, Taavo; Menert, Anne; Loorits, Liis; Tenno, ToomasBiodegradation2012 / p. 509-524 : ill https://www.researchgate.net/publication/348845233_Sulfate-reducing_anaerobic_ammonium_oxidation_as_a_potential_treatment_method_for_high_nitrogen-content_wastewater Sulfate-reducing anaerobic ammonium oxidation as a potential treatment method for high nitrogen-content wastewaterRikmann, Ergo; Zekker, Ivar; Tomingas, Martin; Tenno, Toomas; Menert, Anne; Loorits, Liis; Tenno, TaavoAGRO 2011 : 8th IWA International Symposium on Waste Management Problems in Agroindustries : Cesme, Izmir, Turkey, 22-24 June 2011 : proceedings. 22011 / p. 755-762