Enhanced denitrification and organics removal in hybrid wetland columns: comparative experiments
Saeed, Tanveer, and Sun, Guangzhi (2011) Enhanced denitrification and organics removal in hybrid wetland columns: comparative experiments. Bioresource Technology, 102 (2). pp. 967-974.
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This study investigated three lab-scale hybrid wetland systems with traditional (gravel) and alternative substrates (wood mulch and zeolite) for removing organic, inorganic pollutants and coliforms from a synthetic wastewater, in order to investigate the efficiency of alternative substrates, and monitor the stability of system performance. The hybrid systems were operated under controlled variations of hydraulic load (q, 0.3-0.9 m3/m2 d), influent ammoniacal nitrogen (NH4-N, 22.0-80.0 mg/L), total nitrogen (TN, 24.0-84.0 mg/L) and biodegradable organics concentration (BOD5, 14.5-102.0 mg/L). Overall, mulch and zeolite showed promising prospect as wetland substrates, as both media enhanced the removal of nitrogen and organics. Average NH4-N, TN and BOD5 removal percentages were over 99%, 72% and 97%, respectively, across all three systems, indicating stable removal performances regardless of variable operating conditions. Higher Escherichia coli removal efficiencies (99.9%) were observed across the three systems, probably due to dominancy of aerobic conditions in vertical wetland columns of the hybrid systems.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||constructed wetland; denitrification; nitrification; organic; stability|
|FoR Codes:||09 ENGINEERING > 0905 Civil Engineering > 090508 Water Quality Engineering @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 100%|
|Deposited On:||30 Aug 2011 15:07|
|Last Modified:||30 Aug 2011 15:07|
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