Activated sludge process coupled with intermittent ozonation for sludge yield reduction and effluent water quality controlJärvik, Oliver; Viiroja, Andres; Kamenev, Sven; Kamenev, InnaJournal of chemical technology and biotechnology2011 / p. 978–984 : ill Aerobic bio-oxidation combined with ozonation for recalcitrant wastewater treatmentKamenev, Inna; Viiroja, Andres; Kallas, JuhaThird International Conference on Oxidation Technologies for Water and Wastewater Treatment - Special Topic: AOP's for Recycling and Reuse : 18-22 May 2003, Goslar, Germany2003 / p. 952-957 Aerobic bio-oxidation with ozonation for recalcitrant wastewater treatmentKamenev, Inna; Viiroja, Andres; Kallas, JuhaJournal of advanced oxidation technologies2008 / 2, p. 338-347 Aerobic bio-oxidation with ozonation in pulp and paper mill wastewater and phenolic wastewater treatmentKamenev, Inna; Viiroja, Andres; Kallas, JuhaProceedings of International Conference on Ozone : a Clean Source for Activated Oxygen Oxidations and Disinfection : 7-11 April, 2003, Berlin2003 / p. 247-264 Aktiivsuskoefitsiendi tuletisedViiroja, AndresXXIII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid1997 / lk. 156 Biooksüdatsioon koos keemilise oksüdatsioonigaJärvik, Oliver; Viiroja, Andres; Kamenev, Sven; Kamenev, InnaXXXII Eesti Keemiapäevad : teaduskonverentsi teesid2011 / lk. 30 : ill Chemical and biochemical oxidation in wastewater treatment technology : mass transfer and reaction kineticsKamenev, Inna; Viiroja, Andres; Kallas, JuhaScientific proceedings of Riga Technical University. Series: Material Science and Applied Chemistry2002 / p. 47-58 : ill Derivatives of the activity coefficientViiroja, Andres23rd Estonian Chemistry Days : abstracts of scientific conference1997 / p. 164 Enhancement of aerobic biooxidation with Ozone in Phenolic Wastewater TreatmentKamenev, Inna; Viiroja, Andres; Kallas, JuhaProceedings of 17th World Congress and Exhibition "Ozone and Related Oxidants. Innovative and Current Technologies" : Strasbourg, France, August 22-25, 20052005 / ? p Estimation of ozonation kinetics in a small bubble columnViiroja, Andres; Kamenev, Inna; Kallas, JuhaProceedings of 17th International Ozone Association World Congress and Exhibition "Ozone and Related Oxidants. Innovative and Current Technologies" : Strasbourg, France, August 22-25, 20052005 / ? p GAC-adsorption of 5-methylresorcinolViiroja, Andres; Joarand, Heiki; Kallas, Juha; Palosaari, SeppoOil shale1994 / 2, p. 107-115: ill Influence of activated carbon on ozonation of phenolic wastewaterJärvik, Oliver; Saarik, Vardo; Osadchuk, Irina; Viiroja, Andres; Kamenev, Inna20th IOA World Congress - 6th IUVA World Congress : Ozone and UV Leading-Edge Science and Technologies : Paris, France, 23-27 May 2011 : proceedings2011 / p. VIII.2.11-1 - VIII.2.11-9 Ksülidiini sisaldava vee adsorptsiooni dünaamika täidiskolonnisReinik, Janek; Viiroja, Andres; Kallas, JuhaXXVII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 27th Estonian Chemistry Days : abstracts of scientific conference2001 / lk. 113-114 Massivahetusprotsesside astmetega mudelite lahendamisest = Solving staged mass transfer modelsViiroja, AndresXVII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 17th Estonian Chemistry Days : abstracts of scientific conference1996 / lk. 225-226 https://www.ester.ee/record=b1070511*est Mathematical models, simulation and parameter estimation for water/wastewater treatment by ozone in semicontinious, countercurrent and cocurrent columnsKallas, Juha; Munter, Rein; Viiroja, Andres; Kõrvits, Madis12th Ozone World Congress, May 15th to 18th, 1995, Lille, France : proceedings. Vol. 21995 / p. 229-240 Organics and nitrogen removal from phenolic wastewater with combined treatmentKamenev, Inna; Viiroja, Andres; Munter, Rein; Kallas, JuhaProceedings IWA Spezialized Conference "Nutrient Management in Wastewater Treatment Processes and Recycle Streams" : Krakow, Poland, September 19-21, 20052005 / p. 1095-1099 Ozonation and AOP parameter estimation from countercurrent film absorber dataKallas, Juha; Huuskonen, M.; Kamenev, Sven; Munter, Rein; Viiroja, AndresOzone : science & engineering1995 / 5, p. 527-550: ill Ozonation and AOPs for oil shale industry's wastewater treatment : an overviewMunter, Rein; Trapido, Marina; Kallas, Juha; Kamenev, Sven; Preis, Sergei; Viiroja, Andres; Kamenev, Inna; Järvik, Oliver; Kulik, Niina; Veressinina, JelenaOzone news2009 / 4, p. 17-22 Ozonation and AOPs for oil shale industry's wastewater treatment : an overviewMunter, Rein; Trapido, Marina; Kallas, Juha; Kamenev, Sven; Preis, Sergei; Viiroja, Andres; Kamenev, Inna; Järvik, Oliver; Kulik, Niina; Veressinina, JelenaExecutive summaries : 5th International Conference. 10th IOA-EA3G Berlin Conference on Oxidation Technologies for Water and Wastewater Treatment : Berlin, Germany, March 30 - April 2, 20092009 / p. 14/PC25(1-8) Ozonation of lignin aqueous solutionsKamenev, Inna; Velts, Olga; Viiroja, Andres; Häkkinen, Antti; Kallas, JuhaExecutive summaries : 5th International Conference. 10th IOA-EA3G Berlin Conference on Oxidation Technologies for Water and Wastewater Treatment : Berlin, Germany, March 30 - April 2, 20092009 / p. 39-40/PC223(1-8) Pinch analysis helps save energy in an alcohol distillery in EstoniaKamenev, Inna; Klemeš, J.; Mikkal, Valdek; Preis, Sergei; Tali, Enn; Valdlo, K.; Viiroja, Andres12th International Congress of Chemical and Process Engineering : CHISA'96, Praha, Czech Republic, 25-30 August 1996 : summaries. 8, Process System Engineering1996 / p. 38 PINCH-analüüs aitab hoida kokku energiat = PINCH-analysis helps to save energy at alcohol distilleryKamenev, Inna; Klemensh, J.; Mikkal, Valdek; Preis, Sergei; Tali, Enn; Valdlo, K.; Viiroja, AndresXVII Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 17th Estonian Chemistry Days : abstracts of scientific conference1996 / lk. 65-66 https://www.ester.ee/record=b1070511*est Poolperioodse osoneerimise mudelidViiroja, Andres; Kamenev, Inna; Kallas, JuhaXXIX Eesti keemiapäevad : teaduskonverentsi ettekannete teesid = 29th Estonian Chemistry Days : abstracts of scientific conference2005 / lk. 134 Purification of phenolic wastewater using aerobic bio-oxidation combined with activated carbon treatment and ozonationJärvik, Oliver; Kamenev, Inna; Viiroja, Andres; Kallas, JuhaOzone & Related Oxidants in : Advanced Treatment of Water for Human Health and Environment Protection : IOA International Conference Brussels, Belgium, May 15-16, 20082008 / p. 1.2-1 - 1.2-10 Purification of phenolic wastewater using aerobic bio-oxidation combined with activated carbon treatment and ozonationJärvik, Oliver; Kamenev, Inna; Viiroja, Andres; Kallas, JuhaOzone : science & engineering2010 / 6, p. 417-423 : ill Purification of pulp and paper mill wastewater - aerobic bio-oxidation with ozonation in re-circulation systemKamenev, Inna; Roosalu, Kati; Vaks, Ursula; Viiroja, Andres; Kallas, JuhaInternational Conference on Ozone in Global Water Sanitation, Amsterdam, the Netherlands, October 1st to October 3rd 2002 : proceedings2002 / p. IV-6-1 - IV-6-18 : ill Samiiniga reostatud põhjavee puhastamine granuleeritud aktiivsöegaReinik, Janek; Viiroja, Andres; Kallas, Juha; Munter, Rein; Verenich, Svetlana; Preis, SergeiXXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 26th Estonian Chemistry Days : abstracts of scientific conference2000 / lk. 122-123 Simulation and parameter estimation of ozonation column modelsKallas, Juha; Munter, Rein; Viiroja, Andres; Kõrvits, MadisActa chimica hungarica1995 / 5, Models in chemistry, p. 807-829: ill Xylidine-polluted groundwater purification : adsorption experiments and breakthrough calculationsReinik, Janek; Viiroja, Andres; Kallas, JuhaProceedings of the Estonian Academy of Sciences. Chemistry2001 / 4, p. 205-216 Влияние интенсивности массообмена на коэффициенты переносаViiroja, AndresIV республиканская конференция молодых ученых-химиков : тезисы докладов1981 / с. 123-124 https://www.ester.ee/record=b1309986*est Дистилляция частично растворимых смесей с водяным паром : автореферат ... кандидата технических наук (05.17.08)Viiroja, Andres1983 https://www.ester.ee/record=b1521551*est Использование метода UNIFAC при нахождении фазовых равновесий в многокомпонентных системахKallas, Juha; Viiroja, Andres; Siirde, EnnoЖурнал прикладной химии1978 / с. 2471-2475 : ил., табл https://www.ester.ee/record=b1182398*est Исследование процесса экстракции пневого осмолаViiroja, Andres; Evert, I.; Uus, EndelXX студенческая научно-техническая конференция вузов Прибалтийских республик, Белорусской ССР и Молдавской ССР : тезисы докладов. Часть 21974 / с. 368-369 https://www.ester.ee/record=b1306141*est Массо- и теплоперенос при дистилляции многокомпонентных смесей с насыщенным водяным паромViiroja, Andres; Kallas, Juha; Siirde, EnnoЖурнал прикладной химии1980 / с. 2262-2266 : ил https://www.ester.ee/record=b1182398*est Метод расчета непрерывного совмещенного реакционно-ректификационного процессвJoarand, Heiki; Viiroja, AndresДостижения в области физико-химических методов анализа и аналитический контроль производств : Научно-техническая конференция молодых ученых и специалистов (26-28 марта 1985 г.) : Тезисы докладов1985 / с. 71-72 Метод решения систем нелинейных уравненийViiroja, AndresПроцессы и аппараты химической технологии. 11987 / с. 12-17 Моделирование процесса периодической ректификации суммарных феноловReile, Rein; Viiroja, Andres; Bakalova, M.O.Республиканская научная конференция "Химия и применение фенолальдегидных смол" : тезисы докладов1987 / с. 21-22 : ил https://www.ester.ee/record=b1263082*est Моделирование ректификации многокомпонентных смесейViiroja, Andres5-я республиканская конференция молодых ученых-химиков : [тезисы докладов]1983 / с. 120 https://www.ester.ee/record=b1312297*est Процессы и аппараты химической технологииFeldmann, Liia; Pikkov, Lui; Viiroja, Andres; Roosimölder, Lembit; Munter, Rein; Sarv, Laur; Joarand, Heiki; Kallas, Juha; Kamenev, Inna; Preis, Sergei; Siirde, Enno; Koel, Mihkel; Tearo, Jelena; Loorits, Hilja; Mikkal, Valdek; Kamenev, Sven; Bakalova, M.O.; Orupõld, T.; Reile, Rein; Uus, Endel; Tearo, Eduard1987 https://www.ester.ee/record=b2191192*est Процессы и аппараты химической технологииFeldmann, Liia; Bakalova, M.O.; Kallas, Juha; Reile, Rein; Viiroja, Andres; Preis, Sergei; Munter, Rein; Siirde, Enno; Sarv, Laur; PIkkov, Lui; Veressinina, Jelena1988 https://www.ester.ee/record=b2191189*est Расчет периодической ректификации фенольного сырьяReile, Rein; Viiroja, Andres; Bakalova, M.O.Процессы и аппараты химической технологии. 21988 / с. 11-19 Расчет трехфазной контактной ступениViiroja, AndresIII республиканская конференция молодых ученых-химиков, 15-17 мая 1979 года : тезисы докладов1979 / с. 176 https://www.ester.ee/record=b1280470*est Сопряженная тепло- и массопередача в многокомпонентной парожидкостной системеViiroja, Andres; Joarand, Heiki; Kamenev, Inna; Reile, Rein; Kallas, JuhaСовременные проблемы тепло- и массообмена в химической технологии : материалы Международной школы-семинара. Ч. 11986 / с. 76-85 https://www.ester.ee/record=b2676985*est Успехи в теории и расчете перегонки и реактификации в присутствии водяного параKallas, Juha; Siirde, Enno; Viiroja, Andres; Reile, ReinXII Менделеевский съезд по общей и прикладной химии : рефераты докладов и сообщений. №.5, Теоретические основы химической технологии. Химические проблемы металлургии. Химия и технология силикатов1981 / с. 64-65 https://www.ester.ee/record=b2050266*est