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Performance of autotrophic nitrogen removal from digested piggery wastewater
- Source :
- Bioresource Technology. 241:465-472
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- The performance of an autotrophic nitrogen removal process to treat digested piggery wastewater (DPW) was investigated by gradually shortening the HRT and enhancing the DPW concentration during 390 days of operation. The results showed that the total nitrogen removal rate and efficiency reached 3.9 kg-N m −3 day −1 and 73%, which were significantly higher than the levels reported previously. A high relative abundance of Nitrosomonas (4.2%) and functional microbes (12.15%) resulted in a high aerobic ammonium oxidizing activity (1.25 ± 0.1 g-N g VSS −1 d −1 ), and a good settling ability (SVI, 78.42 mL g −1 SS) resulted in a high sludge concentration (VSS, 11.01 g L −1 ), which laid a solid foundation for the excellent performance. High-throughput pyrosequencing indicated that, compared with synthetic wastewater, the DPW decreased the relative abundances of every functional group of nitrogen removal microbes, and increased relative abundances of anaerobes (15.7%), sulfur-oxidizing bacteria (9.4%) and methanogens (40.8%).
- Subjects :
- 0301 basic medicine
Environmental Engineering
Nitrogen
Bioengineering
Wastewater
010501 environmental sciences
Waste Disposal, Fluid
01 natural sciences
03 medical and health sciences
chemistry.chemical_compound
Bioreactors
Animal science
Settling
Oxidizing agent
Ammonium
Autotroph
Waste Management and Disposal
Relative species abundance
Nitrosomonas
0105 earth and related environmental sciences
Autotrophic Processes
biology
Renewable Energy, Sustainability and the Environment
Environmental engineering
General Medicine
biology.organism_classification
030104 developmental biology
chemistry
Denitrification
Bacteria
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 241
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....ae93397fb456c35054fc0c97be6500bc