The production of cyanobacterial carbon under nitrogen-limited cultivation and its potential for nitrate removal
Huang, Y; Li, P; Chen, G; Peng, L; Chen, X
| HERO ID | 4121846 |
|---|---|
| In Press | No |
| Year | 2018 |
| Title | The production of cyanobacterial carbon under nitrogen-limited cultivation and its potential for nitrate removal |
| Authors | Huang, Y; Li, P; Chen, G; Peng, L; Chen, X |
| Journal | Chemosphere |
| Volume | 190 |
| Page Numbers | 1-8 |
| Abstract | Harmful cyanobacterial blooms (CyanoHABs) represent a serious threat to aquatic ecosystems. A beneficial use for these harmful microorganisms would be a promising resolution of this urgent issue. This study applied a simple method, nitrogen limitation, to cultivate cyanobacteria aimed at producing cyanobacterial carbon for denitrification. Under nitrogen-limited conditions, the common cyanobacterium, Microcystis, efficiently used nitrate, and had a higher intracellular C/N ratio. More importantly, organic carbons easily leached from its dry powder; these leachates were biodegradable and contained a larger amount of dissolved organic carbon (DOC) and carbohydrates, but a smaller amount of dissolved total nitrogen (DTN) and proteins. When applied to an anoxic system with a sediment-water interface, a significant increase of the specific NOX(-)-N removal rate was observed that was 14.2 times greater than that of the control. This study first suggests that nitrogen-limited cultivation is an efficient way to induce organic and carbohydrate accumulation in cyanobacteria, as well as a high C/N ratio, and that these cyanobacteria can act as a promising carbon source for denitrification. The results indicate that application as a carbon source is not only a new way to utilize cyanobacteria, but it also contributes to nitrogen removal in aquatic ecosystems, further limiting the proliferation of CyanoHABs. |
| Doi | 10.1016/j.chemosphere.2017.09.125 |
| Pmid | 28968514 |
| Wosid | WOS:000414881600001 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |