Hydraulic characterization and optimization of total nitrogen removal in an aerated vertical subsurface flow treatment wetland

被引：78
作者：
Boog, Johannes [1 ]
Nivala, Jaime [1 ]
Aubron, Thomas [1 ]
Wallace, Scott [2 ]
van Afferden, Manfred [1 ]
Mueller, Roland Arno [1 ]
机构：
[1] Environm & Biotechnol Ctr UBZ, Helmholtz Ctr Environm Res UFZ, D-04318 Leipzig, Germany
[2] Nat Wallace Consulting LLC, Stillwater, MN 55082 USA
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 162卷
关键词：
Aerated vertical flow constructed wetland; Fluorescein; Intermittent aeration; Nitrogen removal; Tracer study; INFLUENT COD/N RATIOS; WASTE-WATER TREATMENT; CONSTRUCTED WETLANDS; ARTIFICIAL AERATION; OXYGEN-TRANSFER; LANDFILL LEACHATE; PERFORMANCE; DESIGN; TRANSFORMATIONS; DENITRIFICATION;
D O I：
10.1016/j.biortech.2014.03.100
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, a side-by-side comparison of two pilot-scale vertical subsurface flow constructed wetlands (6.2 m(2) Chi 0.85 m, q(i) = 95 L/m(2) d, tau(n) = 3.5 d) handling primary treated domestic sewage was conducted. One system (VA-i) was set to intermittent aeration while the other was aerated continuously (VAp-c). Intermittent aeration was provided to VA-i in an 8 h on/4 h off pattern. The intermittently aerated wetland, VA-i, was observed to have 70% less nitrate nitrogen mass outflow than the continuously aerated wetland, VAp-c. Intermittent aeration was shown to increase treatment performance for TN while saving 33% of running energy cost for aeration. Parallel tracer experiments in the two wetlands showed hydraulic characteristics similar to one Continuously Stirred Tank Reactor (CSTR). Intermittent aeration did not significantly affect the hydraulic functioning of the system. Hydraulic efficiencies were 78% for VAp-c and 76% for VA-i. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：166 / 174
页数：9
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