Role of Colocasia esculenta in Constructed Wetlands for Treating Rice mill Wastewater

T. Balachandran, A. Nanthakumaran, S. Devaisy, K. Sivanesan
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引用次数: 2

Abstract

This study was conducted to assess the efficiency of aquatic macrophyte – Colocasia esculenta to treat the rice mill wastewater especially for (suspended and dissolved) solids, organics, and nutrients in a pilot scale vertical subsurface flow constructed wetlands. Two units of constructed wetlands were assembled with growing media comprised of three layers (soil-sand-gravel), one as control (without macrophyte) and the second as experimental unit (with macrophyte). The collected inlet and outlet samples were analyzed for various water quality parameters and statistical analysis was done to study the significance of Colocasia esculenta in wastewater treatment. The results revealed that Colocasia esculenta was effective in reducing suspended solids (34.5% ± 15.9), BOD5 (53.0% ± 5.7), COD (50.3% ± 11.1), nitrate (55.7% ± 13.5) and phosphate (76.1% ± 20.5) from the wastewater. Besides this, the growing media itself significantly reduced suspended and dissolved solids through sedimentation. Authors claim the Colocasia esculenta was observed to be efficient in treating rice mill wastewater compared to Canna indica for the same experimental conditions. In addition, long term operation of this experiment is needed to study the interactive role of microorganisms to make the treatment system highly efficient, cost effective and sustainable.
绿藻在人工湿地处理米厂废水中的作用
本研究在一个中试垂直潜流人工湿地中,评估了水生植物巨藻(Colocasia esculenta)处理米厂废水的效率,特别是(悬浮和溶解的)固体、有机物和营养物质。两个人工湿地单元由三层生长介质(土壤-沙子-砾石)组成,一个作为对照(不含大型植物),另一个作为实验单元(含大型植物)。对收集的进水和出水样品进行各种水质参数分析,并进行统计分析,研究绿藻在污水处理中的意义。结果表明,绿藻对废水中悬浮物(34.5%±15.9)、BOD5(53.0%±5.7)、COD(50.3%±11.1)、硝酸盐(55.7%±13.5)和磷酸盐(76.1%±20.5)的还原效果较好。此外,生长介质本身通过沉降作用显著减少了悬浮和溶解固体。作者声称,在相同的实验条件下,与美人蕉相比,土芋草对米厂废水的处理效率更高。此外,本实验需要长期运行,以研究微生物的相互作用,使处理系统高效、经济、可持续。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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