Abstract：
:The performance of a BAF system configuring simultaneous chemical phosphorus precipitation in the pre-denitrification stage was examined using a continuously operated setup to treat real domestic wastewater. The effects of using no chemical, dosing sole Fe(2+), and dosing combined Fe(2+), PAM, and NaHCO3 in the pre-denitrification tank were assessed by monitoring COD, nitrogen, and phosphorus removal and hydraulic headloss development in the BAF column. Though dosing sole Fe(2+) significantly enhanced phosphorus removal, it would consume alkalinity through hydrolysis and form smaller-sized sludge flocs in the pre-denitrification tank, and hence resulted in affected NH4(+)-N, insoluble COD, and SS removal in the BAF. Dosing combined Fe(2+), PAM, and NaHCO3 can enhance sludge flocculation to form larger flocs and compensate alkalinity consumption. It exhibited sound performance on COD, nitrogen, and phosphorus removal, and led to less frequent BAF backwashing by slowing clogging development in the BAF filter layer.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Wang H,Dong W,Li T,Liu Tdoi
10.1016/j.biortech.2015.03.132subject
Has Abstractpub_date
2015-01-01 00:00:00pages
44-52eissn
0960-8524issn
1873-2976pii
S0960-8524(15)00464-2journal_volume
189pub_type
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