СЪДЪРЖАНИЕ
- М. Хаджийски. Юбилеен 30-и симпозиум „Управление на енергийни, индустриални и екологични системи”
- моделиране на енергийни системи
И. Симеонов, Н. Пан, Х. Ван, Я. Тян, Е. Чорукова, Н. Христов. Сравнителни изследвания на добивите на енергия при едностъпални и двустъпални процеси на анаеробна биодеградация - А. В. Атанасов, Д. Пилев, Ф. Томова. Бимодална система за разпознаване на емоции, базирана на дълбоки невронни мрежи (Deep Neural Networks)
- С. Йорданов, Г. Михалев, С. Иванов, Х. Стойчева. Интелигентна система за управление на събирането на твърди отпадъци
- Д. Първанов, П. Томов, Т. Балабанов. Фина настройка на LibreOffice Calc NLP Solver за многокритериална оптимизация
- Клуб САИ през 2022 г.
- 23-а международна конференция „Компютърни системи и технологии“ CompSysTech’22, 17-18 юни 2022 г., Русе
- 1st IFAC Workshop on Control for Smart Cities CSC 2022, 27-30 юни 2022 г., Созопол
- Дни на Джон Атанасов и IEEE International Conference Automatics and Informatics’2022 (ICAI’22), 6-8 октомври 2022 г., Варна
- Юбилеен 30-и международен симпозиум „Управление на енергийни, екологични и индустриални системи“, 10-11 ноември 2022 г., София
Key Words: Anaerobic digestion; one-stage anaerobic digestion processes; two-stage anaerobic digestion processes; mathematical modeling; static characteristics; biogas yields; energy yield.
Abstract. Compared to traditional one-stage anaerobic digestion processes (OSAD) with biomethane production, this paper focuses on the study of energy yield of the two-stage anaerobic digestion processes (TSAD), which are able to produce simultaneously biohydrogen and biomethane. In TSAD, relatively fast growing acidogens and H 2-producing bacteria are developed in the first-stage hydrogenic bioreactor and are involved in the production of volatile fatty acides (VFA) and H2. On the other hand, the slow growing acetogens and methanogens are developed in the second-stage methanogenic bioreactor, in which the produced VFA are further converted to CH4 and CO2. This separation allows to optimize physico-chemical parameters for both groups of microorganisms which are not the same. Using mathematical models (mass balance type) developed by our team, theoretical comparative analysis of the energy yield from one-stage and two-stage anaerobic digestion systems is performed. Transforming the differential equations of these balance models, some algebraic equations called static characteristics for both bioreactors were obtained. They represent dependencies of the main process variables from the control variable (dilution rate). On the basis of theese results, the theoretical maximal values of the corresponding enery carriers (hydrogen and methane) yields can be found for different values of the inlet organics (perturbation). The possible maximal biohydrogen and biomethane yields and the overall energy production are calculated by the static characteristics and extremum points of both systems. From the performed analytical and simulation studies, it can be seen that the energy obtained with TSAD is from 32% to 48% greater compared to OSAD under similar conditions (depending on the concentration of the incoming organics).
