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Practicing anammox in a novel hybrid anaerobic-aerobic baffled reactor for treating high-strength ammonium piggery wastewater with low COD/TN ratio
- Source :
- Bioresource technology. 294
- Publication Year :
- 2019
-
Abstract
- A novel hybrid anaerobic-aerobic baffled reactor (HAOBR) with four compartments was constructed to treat manure-free piggery wastewater with an average COD/TN ratio as low as 0.98, without any supplement of external carbon source. Inoculated with aerobic activated sludge and operated at hydraulic retention time 36 h, 32 °C and reflux ratio 2.0, the reactor could perform steadily within 24 days. The removal of COD, NH4+-N and TN within the 21-days steady phase averaged 87.0%, 100% and 91.3%, respectively. Analysis of stoichiometry and results of high-throughput pyrosequencing revealed that the excellent nitrogen removal in the HAOBR was achieved by the cooperation of heterotrophic and autotrophic denitrification with anammox as the dominant approach. Compared with the previously developed microaerobic treatment processes and the recently reported modified A/O process, the HAOBR was more cost-efficient in treating manure-free piggery wastewater because of the less energy consumption, rapid startup process and efficient nutrients removal.
- Subjects :
- 0106 biological sciences
Environmental Engineering
Denitrification
Hydraulic retention time
Nitrogen
Heterotroph
Bioengineering
010501 environmental sciences
Wastewater
01 natural sciences
Waste Disposal, Fluid
chemistry.chemical_compound
Bioreactors
010608 biotechnology
Ammonium Compounds
Ammonium
Autotroph
Anaerobiosis
Waste Management and Disposal
0105 earth and related environmental sciences
Renewable Energy, Sustainability and the Environment
General Medicine
Pulp and paper industry
Activated sludge
chemistry
Anammox
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 294
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....cca8e3128204e85d6e85ef34a3acc886