Biological denitrification from mature landfill leachate using a food-waste-derived carbon source
Yan, F; Jiang, J; Zhang, H; Liu, N; Zou, Q
| HERO ID | 4736940 |
|---|---|
| In Press | No |
| Year | 2018 |
| Title | Biological denitrification from mature landfill leachate using a food-waste-derived carbon source |
| Authors | Yan, F; Jiang, J; Zhang, H; Liu, N; Zou, Q |
| Journal | Journal of Environmental Management |
| Volume | 214 |
| Page Numbers | 184-191 |
| Abstract | The mature landfill leachate containing high ammonia concentration (>1000 mg/L) is a serious threat to environment; however, the low COD to TN ratio (C/N, <3) strongly inhibits the denitrification process and poses a severe obstacle for efficient treatment. Herein, two kinds of acidogenic liquids, fermented from oil-removed food waste and oil-added food waste, were first applied as external carbon sources for the biological nitrogen removal from mature landfill leachate in an aerobic/anoxic membrane bioreactor. "Acidogenic liquid b" served quite better than commercial sodium acetate, considering the higher denitrification efficiency and the slightly rapider denitrification rate. The effect of C/N and temperature were investigated under hydraulic retention time (HRT) of 7 d, which showed that C/N ≥ 7 (25 °C) was enough to meet the general discharge standards of NH4+-N, TN and COD in China. Even for some special areas of China, the more stringent discharge standards (NH4+-N ≤ 8 mg/L, TN ≤ 20 mg/L) could also be achieved under longer HRT of 14 d and C/N ≥ 6. Notably, the COD concentration in effluent could also be well reduced to 50-55 mg/L, without further physical-chemical treatment. This proposed strategy, involving the high-value utilization of food waste, is thus promising for efficient nitrogen removal from mature landfill leachate. |
| Doi | 10.1016/j.jenvman.2018.03.003 |
| Pmid | 29525750 |
| Wosid | WOS:000430646600019 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |