Abstract：
:Nitrate-dependent anaerobic ferrous oxidizing (NAFO) is a valuable biological process, which utilizes ferrous iron to convert nitrate into nitrogen gas, removing nitrogen from wastewater. In this work, the performance of NAFO process was investigated as a nitrate removal technology. The results showed that NAFO system was feasible for autotrophic denitrification. The volumetric loading rate (VLR) and volumetric removal rate (VRR) under steady state were 0.159±0.01 kg-N/(m(3) d) and 0.073±0.01 kg-N/(m(3) d), respectively. In NAFO system, the effluent pH was suggested as an indicator which demonstrated a good correlation with nitrogen removal. The nitrate concentration was preferred to be less than 130 mg-N/L. Organic matters had little influence on NAFO performance. Abundant iron compounds were revealed to accumulate in NAFO sludge with peak value of 51.73% (wt), and they could be recycled for phosphorus removal, with capacity of 16.57 mg-P/g VS and removal rate of 94.77±2.97%, respectively.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang M,Zheng P,Li W,Wang R,Ding S,Abbas Gdoi
10.1016/j.biortech.2014.12.036subject
Has Abstractpub_date
2015-03-01 00:00:00pages
543-548eissn
0960-8524issn
1873-2976pii
S0960-8524(14)01773-8journal_volume
179pub_type
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