期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 95, 期 -, 页码 151-159出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2014.05.027
关键词
Constructed wetlands; River water; Domestic wastewater; Denitrifying bacteria; Hydraulic retention time
资金
- National Natural Science Foundation of China [51378300, 50978156]
- Nature Science Foundation of Shandong Province [ZR2009BZ007]
- Key Research Foundation of Shandong Provincial Environmental protection bureau [hcyf0602]
- Technology Development Projects of Shandong Province [2009GG2GC06002]
Nutrient removal in constructed wetland (CW) microcosms planted with Phragmites and inoculated with a consortium of six denitrifying bacteria was evaluated as a possible treatment for polluted river water (RW) and domestic wastewater (DW) in northern China. Experiments were conducted using the batch-loaded method over a 15 day period. Biol (RW with Phragmites inoculated with the bacterial consortium) and Abio1 (DW with Phragmites and bacterial inoculation) showed significant decreases in chemical oxygen demand (CODcr), and increases in total nitrogen (TN), ammonia (NH3-N) and total phosphorus (TV) removal compared with Bio2 and Abio2, i.e., Phragmites without bacteria inoculation. On the 7th day, the removal efficiencies of Biol were found to be 75.7% for CODcr, 96.7% for TN, 96.8% for NH3-N and 90.4% for TP in RW microcosms, and 85.7% for CODcr, 75% for TN, 88.6% for NH3-N and 88% for TP in Abio1 DW microcosms. Optimal hydraulic retention time (HRT) was 7 days. We conclude that bioaugmentation in CWs with inoculation repeated every 14 days is a cost-effective measure for nutrient removal of polluted river water. (C) 2014 Elsevier Ltd. All rights reserved.
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