| Literature DB >> 24035691 |
Weitang Zhang1, Yongzhen Peng, Nanqi Ren, Qingsong Liu, Yongzhi Chen.
Abstract
A two-sludge system, combining anaerobic/anoxic/aerobic process with biological aerated filter (AAO-BAF), is used to treat domestic wastewater with low COD/N ratio (around 3.6). The volume ratio of anoxic to aerobic zone (Vano/Vaer) of the AAO reactor gradually increased from 2:5 to 6:1, during which the nutrient removal was improved. However, phosphorous removal began to deteriorate noticeably while Vano/Vaer increased to 7:0. The favorable Vano/Vaer was between 2.5:1 and 6:1. When Vano/Vaer was 6:1, the average removal efficiencies of COD, TN and PO4(3-) were 89±4%, 83±3% and 99±1%, respectively. This study suggested the AAO-BAF system could achieve efficient nitrogen and phosphorous removal with limited carbon source.Entities:
Keywords: AAO; BAF; COD/N ratio; Denitrifying phosphorus removal; Domestic wastewater
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Year: 2013 PMID： 24035691 DOI： 10.1016/j.chemosphere.2013.08.047
Source DB: PubMed Journal: Chemosphere ISSN： 0045-6535 Impact factor: 7.086