| Autor: |
LUO Xuejing, ZHONG Yijian, LI Jincheng, LU Zuxian, WANG Xiaoxiao, LI Xinyue |
| Jazyk: |
čínština |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Gongye shui chuli, Vol 44, Iss 6, Pp 117-126 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1005-829X |
| DOI: |
10.19965/j.cnki.iwt.2023-0590 |
| Popis: |
Coffee pectin hydrolysate as an additional carbon source, the denitrification performance was explored by analyzing the denitrification effect in denitrifying biofilter(DNBF) reactor under different HRT and m(COD)/m(TN) (C/N) and microbial community characteristics, and compared with the traditional carbon source of sodium acetate. The results showed that the optimal HRT for the coffee pectin hydrolysate system was 1 h, and the optimal C/N was 6. Under these conditions, when the influent TN and NH4+-N were (33.97±2.06) mg/L and (3.09±0.19) mg/L respectively, coffee pectin hydrolysate as carbon source could reduce the effluent TN and NH4+-N to (3.12±0.59) mg/L and(2.19±0.14) mg/L, respectively. The effluent NO3--N was stabilized below 1 mg/L, and the removal rate reached 97.13%. NO2--N had no obvious accumulation. The NO3--N removed by denitrification per unit COD was 0.22 g/g, which was close to that of the control group sodium acetate. The microbial diversity in the system of coffee pectin hydrolysate was better than that of sodium acetate. There were a large quantities of microorganisms with organic degradation function and denitrification function, such as Zoogloea, Ignavibacterium, unclassified_prolixibacitraceae and Longilinea, which ensured the denitrification effect of coffee pectin hydrolysate as a carbon source. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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