Carine Baggiotto , Samara Terezinha Decezaro , Carlos Alexandre Lutterbeck , Marciano Friedrich , Rolando Jose Manuel González Ramírez , Delmira Beatriz Wolff
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引用次数: 0
Abstract
This study aims to evaluate the performance of a vertical flow constructed wetland (VFCW) with an area of 24.50 m2 for nitrogen removal under two different operational strategies: effluent recirculation and partial saturation. The system operated over two phases. In Phase 1, recirculation was applied with a hydraulic loading rate (HLR) of 90 mm d−1, while in Phase 2, recirculation was halted, and a 25 cm saturated layer was introduced at the bottom of the VFCW, with an HLR of 57 mm d−1. The efficiency of the system in removing chemical oxygen demand (COD), total suspended solids (TSS), ammonia nitrogen (NH₄+-N), and total nitrogen (TN) was compared between the two phases. In Phase 1, removal efficiencies of 88 %, 92 %, 79 %, and 70 % were recorded for COD, TSS, NH₄+-N, and TN, respectively. In Phase 2, the system achieved 93 %, 95 %, 61 %, and 69 % removal for COD, TSS, NH₄+-N, and TN, respectively. Statistically, there were no significant differences in COD and TN removal between the two phases, suggesting that partial saturation can perform comparably to recirculation. However, partial saturation offers the added benefits of reduced energy consumption (no need for pumping) and operational simplicity. The results underscore the potential of partially saturated VFCWs as a cost-effective, energy-efficient alternative for decentralized wastewater treatment, particularly where minimizing operational complexity is a priority.
本研究旨在评价一个面积为24.50 m2的垂直流人工湿地（VFCW）在污水再循环和部分饱和两种不同操作策略下的脱氮性能。该系统分两个阶段运行。在第一阶段，再循环的水力加载速率（HLR）为90 mm d - 1，而在第二阶段，停止再循环，并在VFCW底部引入25 cm的饱和层，HLR为57 mm d - 1。比较了两相对化学需氧量（COD）、总悬浮物（TSS）、氨氮（NH₄+-N）和总氮（TN）的去除效果。在第一阶段，COD、TSS、NH₄+-N和TN的去除率分别为88%、92%、79%和70%。在第二阶段，该系统对COD、TSS、NH₄+-N和TN的去除率分别达到93%、95%、61%和69%。从统计学上看，两相的COD和TN去除率没有显著差异，说明部分饱和与再循环的效果相当。然而，部分饱和还带来了降低能耗（不需要泵送）和操作简单的额外好处。研究结果强调了部分饱和VFCWs作为分散污水处理的一种经济高效的替代方案的潜力，特别是在最小化操作复杂性是优先考虑的情况下。
期刊介绍：
Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers.
Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.
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