文章基本信息

标题：Wastewater Treatment: An Ecological Sanitation Approach in a Constructed Wetland
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作者：Jaya S.Pillai ; Vijayan N.
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
卷号：2
期号：10
页码：5193
出版社：S&S Publications
摘要：This study investigates the potential of constructed wetlands to function as Ecological Sanitation systems,achieving water reuse, nutrient reuse and biomass production. Vertical flow constructed wetland systems planted withindigenous species such as Napier Bajra Hybrid grass (Pennisetum purpureum x Pennisetum typhoides) and Guineagrass (Panicum maximum) were developed for the treatment and utilization of Greywater for non-potable purposes. Theperformance of the control and experimental systems were analysed and compared based on water quality parameterssuch as Turbidity, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids(TSS), Nitrates, Phosphates, and Total Nitrogen (TN). The study also estimated and compared the above groundbiomass yield from the constructed wetland systems. For all the water quality parameters analysed during the studyperiod, the vertical flow constructed wetland system planted with Napier Bajra Hybrid grass achieved high removalefficiency. Best removal efficiencies observed were: Turbidity (99%), TSS (93%), BOD (94%), COD (82%), Nitrates(88%), Phosphates (63%) and TN (60%). The final effluent concentration of the parameters tested reached thestandards required for non-potable purposes as per the USEPA guidelines for water reuse. The annual above groundbiomass yield (from 6-8 harvests) of Napier Bajra Hybrid grass was found to be higher (200 -250 t/ha) when comparedto Guinea grass (60-72 t/ha). Based on the results, the constructed wetland system planted with Napier Bajra Hybridgrass proved to be a reliable, onsite and decentralised Ecological Sanitation system.
关键词：Ecological Sanitation; Vertical flow constructed wetland; Water reuse; Nutrient reuse; Biomass Production