Organic carbon quantity and quality jointly triggered the switch between dissimilatory nitrate reduction to ammonium (DNRA) and denitrification in biofilters
| Autor: | Xufa Ma, Chunlei Song, Feng Sun, Xiuyun Cao, Yiyong Zhou, Qinghui Deng, Xiaowen Li, Mengjuan Tang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
inorganic chemicals
Environmental Engineering Denitrification Nitrogen Health Toxicology and Mutagenesis 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences Corncob 01 natural sciences chemistry.chemical_compound Nitrate Ammonium Compounds Environmental Chemistry Ammonium Nitrite 0105 earth and related environmental sciences Total organic carbon Nitrates Public Health Environmental and Occupational Health food and beverages General Medicine General Chemistry Pollution Carbon 020801 environmental engineering chemistry Environmental chemistry Biofilter Oxidation-Reduction Sodium acetate |
| Zdroj: | Chemosphere. 280:130917 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2021.130917 |
| Popis: | The effect of organic carbon (OC) quality and quantity on switch between dissimilatory nitrate reduction to ammonium (DNRA) and denitrification (DEN) was studied in biofilter systems. High OC in matrix could promote significantly nitrate (NO3−-N) removal due to the reinforce of DEN. Sodium acetate (SA) addition in influent further fueled NO3−-N removal in groups with low OC in matrix but increased ammonium (NH4+-N) and nitrite (NO2−-N) accumulation in groups with high OC in matrix. This indicated that high OC combined different species, facilitated the DNRA over DEN. Compared to bagasse, corncob was the better suitable OC source in matrix for DEN due to slow and continuous release of OC. Hence, in order to promote NO3−-N removal and decline NH4+-N accumulation in biofilters, it is very important to screen suitable OC source (mixed utilization of multiple C sources is recommended) and regulate its dosage (below 80 mg L−1). |
| Databáze: | OpenAIRE |
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