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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Impact of harvesting on constructed wetlands performance-a comparison between Scirpus grossus and Typha angustifolia
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Impact of harvesting on constructed wetlands performance-a comparison between Scirpus grossus and Typha angustifolia

机译：收获对人工湿地性能的影响-短尾短吻鳄和香蒲的比较

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摘要

Three units of free water surface (FWS) constructed wetlands treating domestic wastewater under tropical conditions were examined in terms of water quality and biomass characteristics. One unit (L2) was planted with Scirpus grossus, one with Typha angustifolia (L3), and the unplanted third (L1) served as control. Influent and effluent quality parameters: biological oxygen demand (BOD5), nitrate (NO_3~--N), ammonium (NH_4~+-N), phosphorus (P), total suspended solids (TSS) and fecal coliforms were regularly measured. The average BOD_5 reductions were 37.0%, 58.5%, and 53.8% for units L1, L2, and L3, respectively. The planted units removed pollutants more effectively although there was no significant difference between the Scirpus grossus and Typha angustifolia units. Plant growth was monitored in marked quadrats by measuring shoot height and other growth parameters. The above-ground organs in L2 and L3 was harvested whenever the shoots reached maximum shoot height and formed flowers. Scirpus grossus had sustainable above-ground biomass production but Typha angustifolia could not sustain repeated harvestings with the above-ground biomass production declining significantly following four consecutive harvests.
机译：根据水质和生物量特征，检查了三个单位的自由水面（FWS）人工湿地在热带条件下处理生活污水的能力。一个单位（L2）种植了Scupus grossus，一个单位种植了香蒲（Lypha angustifolia）（L3），而未种植的第三单位（L1）作为对照。进水和出水水质参数：定期测量生物需氧量（BOD5），硝酸盐（NO_3〜--N），铵（NH_4〜+ -N），磷（P），总悬浮固体（TSS）和粪大肠菌群。 L1，L2和L3单元的平均BOD_5减少分别为37.0％，58.5％和53.8％。种植的单位更有效地去除了污染物，尽管Scurpus Grossus和Typha angustifolia单位之间没有显着差异。通过测量枝条高度和其他生长参数，在标记的方眼中监测植物的生长。每当枝条达到最大枝条高度并形成花时，就会收获L2和L3的地上器官。短尾短吻鳄具有可持续的地上生物量生产能力，但香蒲不能持续重复收获，而连续四个收获后地上生物量产量显着下降。

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