期刊
BIORESOURCE TECHNOLOGY
卷 302, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.122864
关键词
Immobilized particles; Partial nitrification; Anammox; Salinity
资金
- National Natural Science Foundation of China [51978348]
- Shandong Key Research and Development Program [2019GSF110014]
- Beijing Postdoctoral Research Foundation [2018-ZZ-012]
The impact of the addition of salinity on partial nitrification and anammox (PN/A) was investigated in this study. The sludge was immobilized by polyethylene glycol (PEG)-modified polyvinyl alcohol (PVA)-sodium alginate (SA) immobilization technology, and the effective diffusion coefficient (D-e) of the immobilized particles was measured to be 0.313 x 10(-9) m(2).s(-1), indicating that the system has excellent mass transfer performance. An experiment was carried out by adding NaCl to create a salinity gradient. It was found that the initiation of partial nitrification was achieved at a concentration of 10 g.L-1 NaCl and the nitrite accumulation rate (NAR) reached 81.03%, which could provide sufficient NO2--N for subsequent anammox. Additionally, an anammox reactor operating at the same salinity maintained a stable state after acclimation, and the removal rates of NH4+-N and NO2--N reached 80%. The dominant population in the anammox system was Planctomycetes. Salinity is a feasible factor for controlling the PN/A process.
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