Helmholtz Center for Environmental Research (UFZ), Environmental and Biotechnology Center (UBZ), Permoserstrasse 15, 04318 Leipzig, Germany.
Helmholtz Center for Environmental Research (UFZ), Environmental and Biotechnology Center (UBZ), Permoserstrasse 15, 04318 Leipzig, Germany.
Bioresour Technol. 2014 Jun;162:166-74. doi: 10.1016/j.biortech.2014.03.100. Epub 2014 Apr 3.
In this study, a side-by-side comparison of two pilot-scale vertical subsurface flow constructed wetlands (6.2 m(2)×0.85 m, q(i)=95 L/m(2) d, τ(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.
本研究并排对比了两个中试规模的侧向潜流人工湿地（6.2 m(2)×0.85 m，q(i)=95 L/m(2) d，τ(n)=3.5 d）处理初级处理生活污水的情况。一个系统（VA-i）设置为间歇曝气，而另一个系统则连续曝气（VAp-c）。间歇曝气系统 VA-i 的曝气模式为 8 h 开/4 h 关。间歇曝气湿地 VA-i 的硝酸盐氮质量流出量比连续曝气湿地 VAp-c 少 70%。间歇曝气被证明可以提高 TN 的处理性能，同时节省曝气运行能源成本的 33%。在两个湿地中进行的平行示踪剂实验表明水力特性类似于连续搅拌釜式反应器（CSTR）。间歇曝气并没有显著影响系统的水力功能。水力效率 VA-pc 为 78%，VA-i 为 76%。
