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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">chemicallytech</journal-id><journal-title-group><journal-title xml:lang="en">Fine Chemical Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Тонкие химические технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-6593</issn><issn pub-type="epub">2686-7575</issn><publisher><publisher-name>MIREA – Russian Technological University (RTU MIREA).</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2410-6593-2024-19-6-508-516</article-id><article-id custom-type="edn" pub-id-type="custom">FPPYBU</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-2193</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOCHEMISTRY AND BIOTECHNOLOGY</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>БИОХИМИЯ И БИОТЕХНОЛОГИЯ</subject></subj-group></article-categories><title-group><article-title>Increasing the efficiency of bioreactor operation for cultivation of methane-oxidizing bacteria under conditions of decreasing carbon dioxide concentration in the cultural liquid</article-title><trans-title-group xml:lang="ru"><trans-title>Повышение эффективности работы биореактора для культивирования метанокисляющих бактерий за счет снижения концентрации углекислого газа в культуральной жидкости</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1194-9732</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кочетков</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Kochetkov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кочетков Владимир Михайлович, начальник технологического отдела</p><p>Scopus Author ID 58535713700</p><p>123112, Москва, ул. Тестовская, д. 10</p></bio><bio xml:lang="en"><p>Vladimir M. Kochetkov, Head of the Technological Department</p><p>Scopus Author ID 58535713700</p><p>10, Testovskaya ul., Moscow, 123112</p></bio><email xlink:type="simple">kwm@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4837-2332</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гаганов</surname><given-names>И. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Gaganov</surname><given-names>I. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гаганов Иван Сергеевич, ведущий инженер-технолог</p><p>Scopus Author ID 57224575918</p><p>123112, Москва, ул. Тестовская, д. 10</p></bio><bio xml:lang="en"><p>Ivan S. Gaganov, Leading Engineer-Technologist</p><p>Scopus Author ID 57224575918</p><p>10, Testovskaya ul., Moscow, 123112</p></bio><email xlink:type="simple">ivan.gaganov@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-4415-6683</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Толкин</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tolkin</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Толкин Дмитрий Владимирович, ведущий инженер</p><p>123112, Москва, ул. Тестовская, д. 10</p></bio><bio xml:lang="en"><p>Dmitry V. Tolkin, Leading Engineer</p><p>10, Testovskaya ul., Moscow, 123112</p></bio><email xlink:type="simple">tolkin.d@gibios.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1570-5893</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кочетков</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kochetkov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кочетков Владимир Владимирович, техник-технолог</p><p>Scopus Author ID 59376710800</p><p>123112, Москва, ул. Тестовская, д. 10</p></bio><bio xml:lang="en"><p>Vladimir V. Kochetkov, Technician-Technologist</p><p>Scopus Author ID 59376710800</p><p>10, Testovskaya ul., Moscow, 123112</p></bio><email xlink:type="simple">vvkochetkov@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1232-7460</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нюньков</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nynkov</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нюньков Павел Андреевич, генеральный директор</p><p>Scopus Author ID 58536061400</p><p>123112, Москва, ул. Тестовская, д. 10</p></bio><bio xml:lang="en"><p>Pavel A. Nynkov, General Manager</p><p>Scopus Author ID 58536061400</p><p>10, Testovskaya ul., Moscow, 123112</p></bio><email xlink:type="simple">nyunkov.P@gibios.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО «ГИПРОБИОСИНТЕЗ»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Giprobiosintez</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>18</day><month>01</month><year>2025</year></pub-date><volume>19</volume><issue>6</issue><fpage>508</fpage><lpage>516</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kochetkov V.M., Gaganov I.S., Tolkin D.V., Kochetkov V.V., Nynkov P.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кочетков В.М., Гаганов И.С., Толкин Д.В., Кочетков В.В., Нюньков П.А.</copyright-holder><copyright-holder xml:lang="en">Kochetkov V.M., Gaganov I.S., Tolkin D.V., Kochetkov V.V., Nynkov P.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.finechem-mirea.ru/jour/article/view/2193">https://www.finechem-mirea.ru/jour/article/view/2193</self-uri><abstract><p>Objectives. The work set out to develop a bioreactor that incorporates a carbon dioxide removal unit within the apparatus gas phase, which is capable of operating without the need for supplementary compression apparatus. As part of testing the developed equipment in order to ascertain its capacity for enhanced biomass production, the principal fermentation system parameters that facilitate the optimal bioreactor productivity in conditions of carbon dioxide removal from the apparatus gas phase were identified.Methods. A series of tests were conducted on the fermentation unit with the objective of controlling the oxygen and carbon dioxide content in the gas phase of the bioreactor. This was achieved using an in-line gas analyzer fitted with electrochemical sensors. The oxygen and carbon dioxide content in the gas phase was determined by means of gas chromatography. The oxygen and natural gas flow rates were determined using a thermal electronic flow controller equipped with thermoresistive elements. The oxygen content of the cultural liquid was determined by means of an optical oxygen sensor with integrated transducer. The pH level in the bioreactor was monitored and maintained using an electrochemical pH sensor.Results. The efficacy of the newly devised jet-type bioreactor design, which permits the incorporation of a carbon dioxide removal unit into the fermentation system without requiring supplementary compression apparatus, was evaluated through experimentation. The system was tested with the carbon dioxide removal unit included in the design, resulting in a 64% increase in bioreactor productivity and a 18% reduction in oxygen consumption as a component of the gas supply.Conclusions. The operational parameters of a technological bioreactor that facilitate a stable continuous process of bacterial cultivation were identified.</p></abstract><trans-abstract xml:lang="ru"><p>Цели. Разработать конструкцию биореактора, позволяющую включить в свой состав узел удаления углекислого газа из газовой фазы аппарата, функционирующий без использования дополнительного компрессионного оборудования; провести испытания разработанного оборудования с целью увеличения его производительности по биомассе; определить основные параметры работы ферментационной системы, при которых достигается максимальная продуктивность биореактора в условиях извлечения углекислого газа из газовой фазы аппарата.Методы. Проведена серия испытаний ферментационной установки с осуществлением контроля содержания кислорода и углекислого газа в газовой фазе биореактора поточным газонализатором с электрохимическими сенсорами. Контрольное определение содержания в газовой фазе кислорода и углекислоты проводилось методом газовой хроматографии. Расход газовых компонентов (кислорода и природного газа) измерялся с помощью теплового электронного регулятора расхода с терморезистивными элементами. Содержание растворенного в культуральной жидкости кислорода определялось оптическим датчиком кислорода со встроенным преобразователем. Уровень рН в биореакторе контролировался и поддерживался с помощью электрохимического рН-датчика.Результаты. Разработан и испытан биореактор струйного типа. За счет использования внутренних рециркуляционных потоков в ферментационную систему интегрирован узел удаления углекислого газа без применения дополнительного компрессионного оборудования. В процессе испытаний системы с включенным в конструкцию узлом извлечения углекислого газа достигнута увеличенная на 64% продуктивность биореактора и снижен на 18% расход кислорода, как компонента газового питания.Выводы. Определены технологические параметры работы биореактора, при которых проходит стабильный процесс непрерывного культивирования бактерий.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>биореактор</kwd><kwd>ферментер</kwd><kwd>ферментация</kwd><kwd>биомасса</kwd><kwd>белок</kwd><kwd>углекислый газ</kwd><kwd>эжектор</kwd><kwd>метаноокисляющие бактерии</kwd><kwd>Methylococcus capsulatus</kwd></kwd-group><kwd-group xml:lang="en"><kwd>bioreactor</kwd><kwd>fermenter</kwd><kwd>fermentation</kwd><kwd>biomass</kwd><kwd>protein</kwd><kwd>carbon dioxide</kwd><kwd>ejector</kwd><kwd>methane-oxidizing bacteria</kwd><kwd>Methylococcus capsulatus</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ошкин И.Ю., Белова С.Э., Хохлачев Н.С., Семенова В.А., Червякова О.П., Чернушкин Д.В., Тихонова Е.Н., Марданов А.В., Равин Н.В., Попов В.О., Пименов Н.В., Дедыш С.Н. 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