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Anammox reactor exposure to thiocyanate: Long-term performance and microbial community dynamics
- Source :
- Bioresource technology. 317
- Publication Year :
- 2020
-
Abstract
- Anaerobic ammonium oxidation (anammox) is an autotrophic denitrification process that has broad application potential for treating coking wastewaters. The present study estimated the effects of thiocyanate (SCN−), a common pollutant in coking wastewaters, on anammox processes and microbial communities in anammox reactors for over two years of continuous exposure. The addition of SCN− (from 50 to 200 mg L−1) showed negative effects on the denitrification performance of the anammox reactors. In SCN−-dosed reactors, increased effluent ammonium concentrations indicated the occurrence of SCN−-based biodegradation processes. Microbial analysis revealed that the anammox species almost disappeared in the reactor dosed with SCN− at over 100 mg L−1. Instead, an abundance of chemolithoautotrophic bacteria belonging to the Thiobacillus genus demonstrated a linear increase with SCN− addition. The competition between anammox species and SCN−-degrading microorganisms was expected to dominate the inhibition effects of SCN− addition on the performance of anammox reactors.
- Subjects :
- 0106 biological sciences
endocrine system
Environmental Engineering
Denitrification
Nitrogen
ved/biology.organism_classification_rank.species
Bioengineering
010501 environmental sciences
complex mixtures
01 natural sciences
Thiobacillus
chemistry.chemical_compound
Bioreactors
010608 biotechnology
Ammonium Compounds
Ammonium
Autotroph
Anaerobiosis
Waste Management and Disposal
Effluent
0105 earth and related environmental sciences
Renewable Energy, Sustainability and the Environment
ved/biology
Microbiota
technology, industry, and agriculture
General Medicine
Biodegradation
nervous system
Microbial population biology
chemistry
Anammox
Environmental chemistry
sense organs
Oxidation-Reduction
Thiocyanates
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 317
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....9fecf147bd049e3c01b35d5289cfb57d