Effects of organic loading rates on microbial communities and biogas production from water hyacinth: a case of mono‐ and co‐digestion
| Autor: | Rosina Nkuna, Ashira Roopnarain, Rasheed Adeleke |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
General Chemical Engineering
02 engineering and technology 010501 environmental sciences 01 natural sciences Inorganic Chemistry Food science Waste Management and Disposal Relative species abundance 0105 earth and related environmental sciences Biogas production biology Renewable Energy Sustainability and the Environment Chemistry Hyacinth Organic Chemistry 021001 nanoscience & nanotechnology biology.organism_classification Pollution Anaerobic digestion Fuel Technology Microbial population biology Composition (visual arts) Co digestion 0210 nano-technology Digestion Biotechnology |
| Zdroj: | Journal of Chemical Technology & Biotechnology. 94:1294-1304 |
| ISSN: | 1097-4660 0268-2575 |
| DOI: | 10.1002/jctb.5886 |
| Popis: | BACKGROUND: Anaerobic digestion is a microbial driven process, which results in biogas production. Although important, the relative abundance of microbial communities can be affected by disturbances such as feeding rates. In this study, the effects of irregular organic loading rates on anaerobic digestion of water hyacinth (mono‐ and co‐digestion) as well as on bacterial and archaeal communities were investigated. The process was conducted at different feeding stages during which the process stability, biogas production, composition and microbial community structure were monitored. RESULTS: Bacterial communities were more influenced by irregular organic loading rates in comparison with archaeal communities. Although microbial community shifts were observed in both mono‐ and co‐digestion, the shift was more prevalent in co‐digestion. Moreover, process stability was evidenced in some stages of mono‐digestion, where the FOS/TAC ratio was within the optimal range. However, for co‐digestion, the low FOS/TAC ratio showed process instability. CONCLUSION: Overall, irregularity in organic loading rates affected the microbial community composition as well as their CH₄ production. © 2018 Society of Chemical Industry |
| Databáze: | OpenAIRE |
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