期刊
BIORESOURCE TECHNOLOGY
卷 363, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.128007
关键词
Anaerobic denitrification; Biotrickling filter; Deodorization; HN-AD pathway; Nitrogen balance
资金
- Sichuan Science and Technology Program [2021ZDZX0012, 2022JDTD0027]
- Major Research and Development program of Shanxi Province [201903D211013-2]
- CAS Light of West China Program [2019XBZG_JCTD_ZDSYS_001]
A strain of Paracoccus denitrificans named HY-1 with excellent capacity of heterotrophic nitrifying aerobic denitrification was isolated from activated sludge. HY-1 was capable of removing NH4+, NO2-, and NO3-, and also could perform denitrification under anaerobic conditions. The study found that HY-1 required less energy investment at a carbon-nitrogen ratio of 1.
A heterotrophic nitrifying aerobic denitrifying (HN-AD) strain HY-1 with excellent capacity, identified as Paracoccus denitrificans, was isolated from activated sludge. HY-1 was capable of removing NH4+, NO2-, and NO3- with the corresponding rate of 17.33 mg-NmiddotL(-1)middoth(-1), 21.83 mg-NmiddotL(-1)middoth(-1), and 32.37 mg-NmiddotL(-1)middoth(-1), as well as the mixture of multiple nitrogen sources. Meanwhile, HY-1 could execute denitrification function under anaerobic conditions with a rate of 14.56 mg-NmiddotL(-1)middoth(-1). HY-1 required less energy investment, which exhibited average denitrification rate of 5.19 mg-NmiddotL(-1)middoth(-1) at carbon-nitrogen ratio was 1. After nitrification-denitrification metabolic pathway analysis, HY-1 was applied in a biological trickling filter reactor for compost deodorization. The results showed that adding of HY-1 greatly reduced the ionic concentration of NH4+ and NO3- in the circulating liquid without impairing the deodorization effect (NH3 removal rate>98.07%). These findings extend the field of application of HN-AD and provide new insights for biological deodorization.
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