Abstract：
:To enhance nutrient removal more cost-efficiently in microaerobic process treating piggery wastewater characterized by high ammonium (NH4+-N) and low chemical oxygen demand (COD) to total nitrogen (TN) ratio, a novel upflow microaerobic biofilm reactor (UMBR) was constructed and the efficiency in nutrient removal was evaluated with various influent COD/TN ratios and reflux ratios. The results showed that the biofilm on the carriers had increased the biomass in the UMBR and enhanced the enrichment of slow-growth-rate bacteria such as nitrifiers, denitrifiers and anammox bacteria. The packed bed allowed the microaerobic biofilm process perform well at a low reflux ratio of 35 with a NH4+-N and TN removal as high as 93.1% and 89.9%, respectively. Compared with the previously developed upflow microaerobic sludge reactor, the UMBR had not changed the dominant anammox approach to nitrogen removal, but was more cost-efficiently in treating organic wastewater with high NH4+-N and low COD/TN ratio.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Meng J,Li J,Li J,Antwi P,Deng K,Nan J,Xu Pdoi
10.1016/j.biortech.2017.10.108subject
Has Abstractpub_date
2018-02-01 00:00:00pages
935-942eissn
0960-8524issn
1873-2976pii
S0960-8524(17)31948-Xjournal_volume
249pub_type
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