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Organic degrading bacteria and nitrifying bacteria stimulate the nutrient removal and biomass accumulation in microalgae-based system from piggery digestate
- Source :
- The Science of the total environment. 707
- Publication Year :
- 2019
-
Abstract
- The microalgae-based system has been applied in anaerobic digestate treatment for nutrient removal and biomass production. To optimize its performance in treating piggery digestate, here, commercial bacterial agents, including organic degrading bacteria (Cb) and nitrifying bacteria (Nb), were inoculated into the microalgae-based system dominated by Desmodesmus sp. CHX1 (D). Reactor DN (inoculated with D and Nb) and DCN (inoculated with D, and Cb to Nb at a ratio of 1:2) have better performance on NH4+-N removal, with a final efficiency at 40.26% and 39.87%, respectively, and no NO3−-N or NO2−-N accumulations. The final total chlorophyll concentration, an indicator of microalgal growth, reached 4.74 and 5.47 mg/L in DN and DCN, respectively, three times more than that in D. These results suggested that high NH4+-N removal was achieved by the assimilation into high microalgal biomass after the inoculation with functional bacteria. High-throughput sequencing showed that the richness of microbial community decreased but the evenness increased by inoculating functional microorganisms. Microalgae aggregating bacteria were Cellvibrio, Sphingobacterium, Flavobacterium, Comamonas, Microbacterium, Dyadobacter, and Paenibacillus. This study revealed that the inoculation with functional bacteria reconstructed the microbial community which benefited for the microalgal growth and nutrient removal, providing a promising strategy for treating highly-concentrated digestate.
- Subjects :
- Environmental Engineering
010504 meteorology & atmospheric sciences
Nitrogen
Microorganism
Microbacterium
010501 environmental sciences
Wastewater
01 natural sciences
Paenibacillus
Microalgae
Environmental Chemistry
Food science
Biomass
Waste Management and Disposal
0105 earth and related environmental sciences
Comamonas
biology
Bacteria
Chemistry
Phosphorus
biology.organism_classification
Pollution
Nitrifying bacteria
Digestate
Flavobacterium
Subjects
Details
- ISSN :
- 18791026
- Volume :
- 707
- Database :
- OpenAIRE
- Journal :
- The Science of the total environment
- Accession number :
- edsair.doi.dedup.....dadc8cb09437a099101860db3d658ab9