Abbasi S A, Tauseef S M
Centre for Pollution Control and Environmental Engineering, Pondicherry University, Chinakalapet, Puducherry 605 014, India E-mail:
Environmental Research Institute, University of Petroleum and Energy Studies, Dehradun 248 007, India.
Water Sci Technol. 2018 May;77(7-8):2005-2013. doi: 10.2166/wst.2018.093.
The ornamental plant Alternanthera ficoidea (also named A. tenella), which is common and widespread throughout the tropics and is being increasingly regarded as an invasive, problematic weed, has been explored as a bioagent in greywater treatment. In the recently developed SHEFROL bioreactor, it was seen to treat greywater of varying strengths (250-1,300 mg/L chemical oxygen demand, COD) quickly and substantially to the extent of 75-77%. Biological oxygen demand (BOD), nitrogen, phosphorus, suspended solids, and heavy metals copper, nickel, manganese, and zinc were also removed to the extents of 83.5, 94.9, 33.1, 27.0, 44.8, 27.5, 38.2, and 43.2%, respectively. As all this was achieved in a single pot, single step, and in a simple reactor operation, at hydraulic retention times of a mere 6 h, it shows the process to be several times more efficient as well as potentially less expensive than the conventional treatment systems which utilize macrophytes in tanks or constructed wetlands.
观赏植物锦绣苋（也称为细叶锦绣苋）在热带地区很常见且分布广泛，现在越来越被视为一种具有侵入性的有害杂草，人们已对其作为中水生物处理剂展开研究。在最近开发的SHEFROL生物反应器中，该植物能快速且大幅地处理不同强度（化学需氧量为250 - 1300毫克/升）的中水，去除率达75 - 77%。生物需氧量、氮、磷、悬浮固体以及重金属铜、镍、锰和锌的去除率分别为83.5%、94.9%、33.1%、27.0%、44.8%、27.5%、38.2%和43.2%。由于所有这些都是在单个花盆、单一步骤以及简单的反应器操作中实现的，水力停留时间仅为6小时，这表明该处理过程比在水箱或人工湿地中利用大型植物的传统处理系统效率高几倍，且成本可能更低。
