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Improvement of sewage sludge anaerobic digestion through synergistic effect combined trace elements enhancer with enzyme pretreatment and microbial community response
- Source :
- Chemosphere. 286:131356
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- In this study, a double E strategy (enzymes and enhancer) characterized by high efficiency for enhancing sewage sludge anaerobic digestion (AD) is proposed. This strategy combines addition of trace elements (TEs) enhancer and enzyme pretreatment, inducing a synergistic effect on AD, and it is more effective and economical compared with TEs addition or enzyme pretreatment in isolation. When adding 400 U/g cocktail enzymes and 1.24% trance elements enhancers, the cumulative methane production and the maximum daily methane increased yield by 45.29% and 84.7%, respectively. According to microbial community analysis, the double E strategy significantly motivate the growth of acetogens and protein fermenting bacterium. The relative abundance of Fermentimonas and Lutispora increased by 6.15% and 5.4%, respectively. Archaeal community analysis and changes in the mcrA gene abundance demonstrate enrichment of hydrogenotrophic methanogens, with the methanogens exhibiting high vitalities and stress resistance. The double E strategy could be a promising way to improve industrial sewage sludge AD efficiency.
- Subjects :
- Environmental Engineering
Health, Toxicology and Mutagenesis
Methane
chemistry.chemical_compound
Bioreactors
Environmental Chemistry
Anaerobiosis
Food science
Enhancer
chemistry.chemical_classification
Sewage
biology
Microbiota
Public Health, Environmental and Occupational Health
General Medicine
General Chemistry
biology.organism_classification
Pollution
Trace Elements
Anaerobic digestion
Enzyme
chemistry
Microbial population biology
Fermentation
Sludge
Bacteria
Subjects
Details
- ISSN :
- 00456535
- Volume :
- 286
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi.dedup.....daa2b52253f12bc1f210133cbc5db585