Enhanced methane production by using phytoremediated Halogeton glomeratus as substrate via anaerobic digestion

The phytoremediated plant contains rich carbon resources, but the anaerobic digestion (AD) process can be inhibited due to high Heavy metals (HMs). In this study, the phytoremediated Halogeton glomeratus (H. glomeratus) was utilized in AD. Results showed that suitable HMs improved the AD efficiency, and the HMs were positively correlated to methane production and microbiota. Compared to CK (without HMs contaminated), H. glomeratus containing HMs (TG) enhanced methane production (increased 85.5%). Also, the highest VS removal rate of 66.5% were achieved. Furthermore, the increased of hydrolytic and acidogenic Acinetbacter and Hydrogenophaga improved substrates degradation. Besides, the methanogenic Methanosarcina increased from 6.5 to 89.5%, and the methanogenic pathway shifted from hydrogenotrophic methanogenesis to aceticlastic methanogenesis. Thus, substrates conversion to methane was improved. Finally, the HMs in digestion slurry were successfully removed and decreased its secondary pollution. This study provided a potential for the resourceful utilization of the phytoremediated plants with suitable HMs concentration. © 2022 Elsevier Ltd

Авторы
Zhang J. 1 , Mao C.1 , Khan A.1 , Zhao S.1 , Gao T.2 , Mikhailovna Redina M. , Zhang Q.1 , Song P.1 , Liu P. 1 , Li X. 1
Журнал
Издательство
Elsevier Ltd
Язык
Английский
Страницы
28-39
Статус
Опубликовано
Том
194
Год
2022
Организации
  • 1 Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, China
  • 2 School of Biological and Environmental Engineering, Xi'an University, Xi'an, 710065, China
  • 3 Peoples' Friendship University of Russia, Miklukho-Maklaya str., 6, Moscow, 117198, Russian Federation
Ключевые слова
Anaerobic digestion; Heavy metals; Methane; Microbial community; Phytoremediated residues
Дата создания
06.07.2022
Дата изменения
06.07.2022
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/83555/
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